diff --git a/libraries/apollo-api/api/apollo-api.api b/libraries/apollo-api/api/apollo-api.api
index decbf1509df..46c8c4d2d29 100644
--- a/libraries/apollo-api/api/apollo-api.api
+++ b/libraries/apollo-api/api/apollo-api.api
@@ -33,6 +33,7 @@ public final class com/apollographql/apollo3/api/Adapters {
 	public static final fun -obj (Lcom/apollographql/apollo3/api/Adapter;)Lcom/apollographql/apollo3/api/ObjectAdapter;
 	public static final fun -optional (Lcom/apollographql/apollo3/api/Adapter;)Lcom/apollographql/apollo3/api/PresentAdapter;
 	public static final fun -present (Lcom/apollographql/apollo3/api/Adapter;)Lcom/apollographql/apollo3/api/PresentAdapter;
+	public static final fun -result (Lcom/apollographql/apollo3/api/Adapter;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)Lcom/apollographql/apollo3/api/ResultAdapter;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/Adapter;Ljava/lang/Object;)Ljava/lang/String;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/Adapter;Ljava/lang/Object;Lcom/apollographql/apollo3/api/CustomScalarAdapters;)Ljava/lang/String;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/Adapter;Ljava/lang/Object;Lcom/apollographql/apollo3/api/CustomScalarAdapters;Ljava/lang/String;)Ljava/lang/String;
@@ -397,7 +398,7 @@ public final class com/apollographql/apollo3/api/CompositeAdapterContext {
 	public final field customScalarAdapters Lcom/apollographql/apollo3/api/CustomScalarAdapters;
 	public final field deferredFragmentIdentifiers Ljava/util/Set;
 	public final field falseVariables Ljava/util/Set;
-	public synthetic fun <init> (Lcom/apollographql/apollo3/api/CustomScalarAdapters;Ljava/util/Set;Ljava/util/Set;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public synthetic fun <init> (Lcom/apollographql/apollo3/api/CustomScalarAdapters;Ljava/util/Set;Ljava/util/Set;Ljava/util/List;Lkotlin/jvm/internal/DefaultConstructorMarker;)V
 }
 
 public final class com/apollographql/apollo3/api/CompositeAdapterContext$Builder {
@@ -405,6 +406,7 @@ public final class com/apollographql/apollo3/api/CompositeAdapterContext$Builder
 	public final fun build ()Lcom/apollographql/apollo3/api/CompositeAdapterContext;
 	public final fun customScalarAdapters (Lcom/apollographql/apollo3/api/CustomScalarAdapters;)Lcom/apollographql/apollo3/api/CompositeAdapterContext$Builder;
 	public final fun deferredFragmentIdentifiers (Ljava/util/Set;)Lcom/apollographql/apollo3/api/CompositeAdapterContext$Builder;
+	public final fun errors (Ljava/util/List;)Lcom/apollographql/apollo3/api/CompositeAdapterContext$Builder;
 	public final fun falseVariables (Ljava/util/Set;)Lcom/apollographql/apollo3/api/CompositeAdapterContext$Builder;
 }
 
@@ -419,6 +421,7 @@ public final class com/apollographql/apollo3/api/CompositeAdaptersKt {
 	public static final fun -obj (Lcom/apollographql/apollo3/api/CompositeAdapter;Z)Lcom/apollographql/apollo3/api/ObjectCompositeAdapter;
 	public static synthetic fun -obj$default (Lcom/apollographql/apollo3/api/CompositeAdapter;ZILjava/lang/Object;)Lcom/apollographql/apollo3/api/ObjectCompositeAdapter;
 	public static final fun -present (Lcom/apollographql/apollo3/api/CompositeAdapter;)Lcom/apollographql/apollo3/api/PresentCompositeAdapter;
+	public static final fun -result (Lcom/apollographql/apollo3/api/CompositeAdapter;)Lcom/apollographql/apollo3/api/ResultCompositeAdapter;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/CompositeAdapter;Ljava/lang/Object;)Ljava/lang/String;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/CompositeAdapter;Ljava/lang/Object;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)Ljava/lang/String;
 	public static final fun -toJson (Lcom/apollographql/apollo3/api/CompositeAdapter;Ljava/lang/Object;Lcom/apollographql/apollo3/api/CompositeAdapterContext;Ljava/lang/String;)Ljava/lang/String;
@@ -884,6 +887,44 @@ public abstract interface class com/apollographql/apollo3/api/Query : com/apollo
 public abstract interface class com/apollographql/apollo3/api/Query$Data : com/apollographql/apollo3/api/Operation$Data {
 }
 
+public abstract interface class com/apollographql/apollo3/api/Result {
+	public fun errorsOrNull ()Ljava/util/List;
+	public fun getOrNull ()Ljava/lang/Object;
+	public fun getOrThrow ()Ljava/lang/Object;
+}
+
+public final class com/apollographql/apollo3/api/Result$Data : com/apollographql/apollo3/api/Result {
+	public fun <init> (Ljava/lang/Object;)V
+	public final fun getValue ()Ljava/lang/Object;
+}
+
+public final class com/apollographql/apollo3/api/Result$Error : com/apollographql/apollo3/api/Result {
+	public fun <init> (Ljava/util/List;)V
+	public final fun getErrors ()Ljava/util/List;
+}
+
+public final class com/apollographql/apollo3/api/ResultAdapter : com/apollographql/apollo3/api/Adapter {
+	public fun <init> (Lcom/apollographql/apollo3/api/Adapter;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)V
+	public fun fromJson (Lcom/apollographql/apollo3/api/json/JsonReader;Lcom/apollographql/apollo3/api/CustomScalarAdapters;)Lcom/apollographql/apollo3/api/Result;
+	public synthetic fun fromJson (Lcom/apollographql/apollo3/api/json/JsonReader;Lcom/apollographql/apollo3/api/CustomScalarAdapters;)Ljava/lang/Object;
+	public fun toJson (Lcom/apollographql/apollo3/api/json/JsonWriter;Lcom/apollographql/apollo3/api/CustomScalarAdapters;Lcom/apollographql/apollo3/api/Result;)V
+	public synthetic fun toJson (Lcom/apollographql/apollo3/api/json/JsonWriter;Lcom/apollographql/apollo3/api/CustomScalarAdapters;Ljava/lang/Object;)V
+}
+
+public final class com/apollographql/apollo3/api/ResultCompositeAdapter : com/apollographql/apollo3/api/CompositeAdapter {
+	public fun <init> (Lcom/apollographql/apollo3/api/CompositeAdapter;)V
+	public fun fromJson (Lcom/apollographql/apollo3/api/json/JsonReader;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)Lcom/apollographql/apollo3/api/Result;
+	public synthetic fun fromJson (Lcom/apollographql/apollo3/api/json/JsonReader;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)Ljava/lang/Object;
+	public fun toJson (Lcom/apollographql/apollo3/api/json/JsonWriter;Lcom/apollographql/apollo3/api/Result;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)V
+	public synthetic fun toJson (Lcom/apollographql/apollo3/api/json/JsonWriter;Ljava/lang/Object;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)V
+}
+
+public final class com/apollographql/apollo3/api/ResultKt {
+	public static final fun getOrElse (Lcom/apollographql/apollo3/api/Result;Ljava/lang/Object;)Ljava/lang/Object;
+	public static final fun missingField (Lcom/apollographql/apollo3/api/json/JsonReader;Ljava/lang/String;)Ljava/lang/Object;
+	public static final fun missingFieldResult (Lcom/apollographql/apollo3/api/json/JsonReader;Lcom/apollographql/apollo3/api/CompositeAdapterContext;)Lcom/apollographql/apollo3/api/Result;
+}
+
 public final class com/apollographql/apollo3/api/ScalarType : com/apollographql/apollo3/api/CompiledNamedType {
 	public fun <init> (Ljava/lang/String;)V
 }
@@ -1314,6 +1355,10 @@ public final class com/apollographql/apollo3/exception/MissingValueException : c
 	public fun <init> ()V
 }
 
+public final class com/apollographql/apollo3/exception/NoDataAndNoErrorsException : com/apollographql/apollo3/exception/ApolloException {
+	public fun <init> (Ljava/lang/Throwable;)V
+}
+
 public final class com/apollographql/apollo3/exception/NoDataException : com/apollographql/apollo3/exception/ApolloException {
 	public fun <init> (Ljava/lang/Throwable;)V
 }
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Adapters.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Adapters.kt
index 8253fc18127..ba94a86f78e 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Adapters.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Adapters.kt
@@ -68,6 +68,25 @@ class NullableAdapter<T : Any>(private val wrappedAdapter: Adapter<T>) : Adapter
   }
 }
 
+class ResultAdapter<T : Any>(private val wrappedAdapter: Adapter<T>, private val adapterContext: CompositeAdapterContext) : Adapter<Result<T>> {
+  override fun fromJson(reader: JsonReader, customScalarAdapters: CustomScalarAdapters): Result<T> {
+    if (reader.peek() == JsonReader.Token.NULL) {
+      val errors = adapterContext.errorsForPath(reader.getPath())
+      if (errors.isNotEmpty()) {
+        reader.skipValue()
+        return Result.Error(errors)
+      }
+    }
+    return Result.Data(wrappedAdapter.fromJson(reader, customScalarAdapters))
+  }
+
+  override fun toJson(writer: JsonWriter, customScalarAdapters: CustomScalarAdapters, value: Result<T>) {
+    // We do not support serializing errors
+    wrappedAdapter.toJson(writer, customScalarAdapters, value.getOrThrow())
+  }
+}
+
+
 @Deprecated("Use PresentAdapter instead")
 class OptionalAdapter<T>(private val wrappedAdapter: Adapter<T>) : Adapter<Optional.Present<@JvmSuppressWildcards T>> {
   override fun fromJson(reader: JsonReader, customScalarAdapters: CustomScalarAdapters): Optional.Present<T> {
@@ -121,7 +140,7 @@ class ApolloOptionalAdapter<T>(private val wrappedAdapter: Adapter<T>) : Adapter
 @JvmName("-obj")
 fun <T> Adapter<T>.obj() = ObjectAdapter(this)
 
-class ObjectAdapter<T>(private val wrappedAdapter: Adapter<T>): Adapter<T> {
+class ObjectAdapter<T>(private val wrappedAdapter: Adapter<T>) : Adapter<T> {
   override fun fromJson(reader: JsonReader, customScalarAdapters: CustomScalarAdapters): T {
     throw IllegalStateException("Input type used in output position")
   }
@@ -302,6 +321,9 @@ fun <T : Any> Adapter<T>.nullable() = NullableAdapter(this)
 @JvmName("-list")
 fun <T> Adapter<T>.list() = ListAdapter(this)
 
+@JvmName("-result")
+fun <T : Any> Adapter<T>.result(adapterContext: CompositeAdapterContext) = ResultAdapter(this, adapterContext)
+
 /**
  * Note that Arrays require their type to be known at compile time, so we construct an anonymous object with reference to
  * function with reified type parameters as a workaround.
@@ -310,7 +332,11 @@ fun <T> Adapter<T>.list() = ListAdapter(this)
 @JvmName("-array")
 inline fun <reified T> Adapter<T>.array() = object : Adapter<Array<T>> {
 
-  private inline fun <reified T> arrayFromJson(wrappedAdapter: Adapter<T>, reader: JsonReader, customScalarAdapters: CustomScalarAdapters): Array<T> {
+  private inline fun <reified T> arrayFromJson(
+      wrappedAdapter: Adapter<T>,
+      reader: JsonReader,
+      customScalarAdapters: CustomScalarAdapters,
+  ): Array<T> {
     reader.beginArray()
     val list = mutableListOf<T>()
     while (reader.hasNext()) {
@@ -324,7 +350,7 @@ inline fun <reified T> Adapter<T>.array() = object : Adapter<Array<T>> {
       wrappedAdapter: Adapter<T>,
       writer: JsonWriter,
       customScalarAdapters: CustomScalarAdapters,
-      value: Array<T>
+      value: Array<T>,
   ) {
     writer.beginArray()
     value.forEach {
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/ApolloResponse.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/ApolloResponse.kt
index 29bf25a1625..31b774d2e67 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/ApolloResponse.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/ApolloResponse.kt
@@ -3,6 +3,7 @@ package com.apollographql.apollo3.api
 import com.apollographql.apollo3.exception.ApolloException
 import com.apollographql.apollo3.exception.ApolloGraphQLException
 import com.apollographql.apollo3.exception.DefaultApolloException
+import com.apollographql.apollo3.exception.NoDataAndNoErrorsException
 import com.apollographql.apollo3.exception.NoDataException
 import com.benasher44.uuid.Uuid
 import kotlin.jvm.JvmField
@@ -80,8 +81,7 @@ private constructor(
 ) {
 
   /**
-   * An [ApolloException] if a complete GraphQL response wasn't received, an instance of [ApolloGraphQLException] if GraphQL
-   * errors were return or another instance of [ApolloException] if a network, parsing, caching or other error happened.
+   * An [ApolloException] if a network, parsing, caching or other error happened.
    *
    * For example, `exception` is non-null if there is a network failure or cache miss.
    *
@@ -90,8 +90,7 @@ private constructor(
   @JvmField
   val exception: ApolloException? = when  {
     exception != null -> exception
-    !errors.isNullOrEmpty() -> ApolloGraphQLException(errors)
-    data == null -> DefaultApolloException("No data and no error was returned")
+    data == null -> NoDataAndNoErrorsException(exception)
     else -> null
   }
 
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapter.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapter.kt
index bda416f58b1..f7cd0363dfa 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapter.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapter.kt
@@ -1,5 +1,6 @@
 package com.apollographql.apollo3.api
 
+import com.apollographql.apollo3.annotations.ApolloExperimental
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import okio.IOException
@@ -32,11 +33,19 @@ class CompositeAdapterContext private constructor(
 
     @JvmField
     val deferredFragmentIdentifiers: Set<DeferredFragmentIdentifier>?,
+
+    private var errors: List<Error>,
 ) {
+
+
+  @ApolloExperimental
+  fun errorsForPath(path: List<Any>) = errorsForPath(path, errors)
+
   class Builder {
     private var customScalarAdapters: CustomScalarAdapters? = null
     private var falseVariables: Set<String>? = null
     private var deferredFragmentIdentifiers: Set<DeferredFragmentIdentifier>? = null
+    private var errors: List<Error>? = null
 
     fun customScalarAdapters(customScalarAdapters: CustomScalarAdapters) = apply {
       this.customScalarAdapters = customScalarAdapters
@@ -45,15 +54,21 @@ class CompositeAdapterContext private constructor(
     fun falseVariables(falseVariables: Set<String>?) = apply {
       this.falseVariables = falseVariables
     }
+
     fun deferredFragmentIdentifiers(deferredFragmentIdentifiers: Set<DeferredFragmentIdentifier>?) = apply {
       this.deferredFragmentIdentifiers = deferredFragmentIdentifiers
     }
 
+    fun errors(errors: List<Error>) = apply {
+      this.errors = errors
+    }
+
     fun build(): CompositeAdapterContext {
       return CompositeAdapterContext(
           customScalarAdapters ?: CustomScalarAdapters.Empty,
           falseVariables ?: emptySet(),
-          deferredFragmentIdentifiers
+          deferredFragmentIdentifiers,
+          errors ?: emptyList()
       )
     }
 
@@ -67,3 +82,22 @@ fun <T> CompositeAdapter<T>.toJson(writer: JsonWriter, customScalarAdapters: Cus
 fun <T> CompositeAdapter<T>.fromJson(reader: JsonReader, customScalarAdapters: CustomScalarAdapters): T {
   return fromJson(reader, CompositeAdapterContext.Builder().customScalarAdapters(customScalarAdapters).build())
 }
+
+private fun List<Any>.startsWith(responsePath: List<Any>): Boolean {
+  for (i in 1.until(responsePath.size)) {
+    if (i - 1 >= this.size) {
+      return false
+    }
+    if (responsePath[i] != this[i - 1]) {
+      return false
+    }
+  }
+  return true
+}
+
+private fun errorsForPath(responsePath: List<Any>, errors: List<Error>): List<Error> {
+  // XXX: optimize
+  return errors.filter {
+    it.path?.startsWith(responsePath) ?: false
+  }
+}
\ No newline at end of file
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapters.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapters.kt
index f8ff97835b9..7a7014a51b8 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapters.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/CompositeAdapters.kt
@@ -6,6 +6,7 @@ import com.apollographql.apollo3.api.json.MapJsonReader.Companion.buffer
 import com.apollographql.apollo3.api.json.MapJsonWriter
 import com.apollographql.apollo3.api.json.buildJsonString
 import com.apollographql.apollo3.api.json.writeAny
+import com.apollographql.apollo3.exception.DefaultApolloException
 import kotlin.jvm.JvmName
 import kotlin.jvm.JvmOverloads
 import kotlin.jvm.JvmSuppressWildcards
@@ -55,6 +56,27 @@ class NullableCompositeAdapter<T : Any>(private val wrappedAdapter: CompositeAda
   }
 }
 
+class ResultCompositeAdapter<T : Any>(private val wrappedAdapter: CompositeAdapter<T>): CompositeAdapter<Result<T>> {
+  override fun fromJson(reader: JsonReader, adapterContext: CompositeAdapterContext): Result<T> {
+    try {
+      return Result.Data(wrappedAdapter.fromJson(reader, adapterContext))
+    } catch (e: Exception) {
+      val errors = adapterContext.errorsForPath(reader.getPath())
+      if (errors.isNotEmpty()) {
+        reader.skipValue()
+        return Result.Error(errors)
+      }
+
+      throw DefaultApolloException("no error found for @catch field at '${reader.getPath()}'")
+    }
+  }
+
+  override fun toJson(writer: JsonWriter, value: Result<T>, adapterContext: CompositeAdapterContext) {
+    // We do not support serializing errors
+    wrappedAdapter.toJson(writer, value.getOrThrow(), adapterContext)
+  }
+}
+
 class PresentCompositeAdapter<T>(private val wrappedAdapter: CompositeAdapter<T>) : CompositeAdapter<Optional.Present<@JvmSuppressWildcards T>> {
   override fun fromJson(reader: JsonReader, adapterContext: CompositeAdapterContext): Optional.Present<T> {
     return Optional.Present(wrappedAdapter.fromJson(reader, adapterContext))
@@ -132,6 +154,9 @@ class ObjectCompositeAdapter<T>(
   }
 }
 
+@JvmName("-result")
+fun <T : Any> CompositeAdapter<T>.result() = ResultCompositeAdapter(this)
+
 @JvmName("-nullable")
 fun <T : Any> CompositeAdapter<T>.nullable() = NullableCompositeAdapter(this)
 
@@ -145,6 +170,7 @@ fun <T> CompositeAdapter<T>.obj(buffered: Boolean = false) = ObjectCompositeAdap
 fun <T> CompositeAdapter<T>.present() = PresentCompositeAdapter(this)
 
 
+
 @JvmName("-toJson")
 @JvmOverloads
 fun <T> CompositeAdapter<T>.toJsonString(
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Executables.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Executables.kt
index b1a5c20587e..18b02f1a9e3 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Executables.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Executables.kt
@@ -72,16 +72,33 @@ fun <D : Executable.Data> Executable<D>.parseData(
     customScalarAdapters: CustomScalarAdapters = CustomScalarAdapters.Empty,
     falseVariables: Set<String>? = null,
     deferredFragmentIds: Set<DeferredFragmentIdentifier>? = null,
+): D? {
+  return parseData(
+      jsonReader = jsonReader,
+      customScalarAdapters = customScalarAdapters,
+      falseVariables = falseVariables,
+      deferredFragmentIds = deferredFragmentIds,
+      errors = emptyList()
+  )
+}
+
+@ApolloInternal
+fun <D : Executable.Data> Executable<D>.parseData(
+    jsonReader: JsonReader,
+    customScalarAdapters: CustomScalarAdapters,
+    falseVariables: Set<String>?,
+    deferredFragmentIds: Set<DeferredFragmentIdentifier>?,
+    errors: List<Error>,
 ): D? {
   val adapterContext = CompositeAdapterContext.Builder()
       .customScalarAdapters(customScalarAdapters)
       .falseVariables(falseVariables)
       .deferredFragmentIdentifiers(deferredFragmentIds)
+      .errors(errors)
       .build()
   return adapter().nullable().fromJson(jsonReader, adapterContext)
 }
 
-
 fun <D : Executable.Data> Executable<D>.composeData(
     jsonWriter: JsonWriter,
     customScalarAdapters: CustomScalarAdapters,
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Result.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Result.kt
new file mode 100644
index 00000000000..590aa5caa12
--- /dev/null
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Result.kt
@@ -0,0 +1,36 @@
+package com.apollographql.apollo3.api
+
+import com.apollographql.apollo3.api.json.JsonReader
+import com.apollographql.apollo3.exception.ApolloGraphQLException
+import com.apollographql.apollo3.exception.DefaultApolloException
+
+sealed interface Result<out V> {
+  fun getOrNull(): V? = (this as? Data)?.value
+  fun getOrThrow(): V {
+    return when(this) {
+      is Data -> value
+      is Error -> throw ApolloGraphQLException(errors)
+    }
+  }
+
+  fun errorsOrNull(): List<com.apollographql.apollo3.api.Error>? = (this as? Error)?.errors
+
+  class Data<V>(val value: V): Result<V>
+  class Error(val errors: List<com.apollographql.apollo3.api.Error>) : Result<Nothing>
+}
+
+
+fun <V> Result<V>.getOrElse(fallback: V): V = (this as? Result.Data)?.value ?: fallback
+
+fun <V> missingFieldResult(jsonReader: JsonReader, adapterContext: CompositeAdapterContext): Result<V> {
+  val errors = adapterContext.errorsForPath(jsonReader.getPath())
+  if (errors.isEmpty()) {
+    throw DefaultApolloException("No field returned at ${jsonReader.getPath()}")
+  }
+
+  return Result.Error(errors)
+}
+
+fun <V> missingField(jsonReader: JsonReader, name: String): V {
+  throw DefaultApolloException("Field '$name' is missing at path ${jsonReader.getPath()}")
+}
\ No newline at end of file
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/internal/ResponseParser.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/internal/ResponseParser.kt
index 83bd31c2848..05e0ccb0a7f 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/internal/ResponseParser.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/internal/ResponseParser.kt
@@ -34,7 +34,7 @@ internal object ResponseParser {
       when (jsonReader.nextName()) {
         "data" -> {
           val falseVariables = operation.falseVariables(customScalarAdapters)
-          data = operation.parseData(jsonReader, customScalarAdapters, falseVariables, deferredFragmentIds)
+          data = operation.parseData(jsonReader, customScalarAdapters, falseVariables, deferredFragmentIds, errors ?: emptyList())
         }
         "errors" -> errors = jsonReader.readErrors()
         "extensions" -> extensions = jsonReader.readAny() as? Map<String, Any?>
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/exception/Exceptions.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/exception/Exceptions.kt
index fb4db23b908..045270622d7 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/exception/Exceptions.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/exception/Exceptions.kt
@@ -24,6 +24,11 @@ class DefaultApolloException(message: String? = null, cause: Throwable? = null):
  */
 class NoDataException(cause: Throwable?): ApolloException("No data was found", cause)
 
+/**
+ * No data and no error found.
+ */
+class NoDataAndNoErrorsException(cause: Throwable?): ApolloException("No data and no error found", cause)
+
 /**
  * A network error happened: socket closed, DNS issue, TLS problem, etc...
  *
diff --git a/libraries/apollo-ast/api/apollo-ast.api b/libraries/apollo-ast/api/apollo-ast.api
index f4c96971a9a..5bd7f593a4c 100644
--- a/libraries/apollo-ast/api/apollo-ast.api
+++ b/libraries/apollo-ast/api/apollo-ast.api
@@ -931,12 +931,14 @@ public final class com/apollographql/apollo3/ast/ReservedEnumValueName : com/apo
 }
 
 public final class com/apollographql/apollo3/ast/Schema {
+	public static final field CATCH Ljava/lang/String;
 	public static final field Companion Lcom/apollographql/apollo3/ast/Schema$Companion;
 	public static final field FIELD_POLICY Ljava/lang/String;
 	public static final field FIELD_POLICY_FOR_FIELD Ljava/lang/String;
 	public static final field FIELD_POLICY_KEY_ARGS Ljava/lang/String;
 	public static final field FIELD_POLICY_PAGINATION_ARGS Ljava/lang/String;
 	public static final field NONNULL Ljava/lang/String;
+	public static final field NULL_ONLY_ON_ERROR Ljava/lang/String;
 	public static final field OPTIONAL Ljava/lang/String;
 	public static final field REQUIRES_OPT_IN Ljava/lang/String;
 	public static final field TYPE_POLICY Ljava/lang/String;
diff --git a/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/Schema.kt b/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/Schema.kt
index 7ffd4ced8eb..b3925980dbf 100644
--- a/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/Schema.kt
+++ b/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/Schema.kt
@@ -193,6 +193,8 @@ class Schema internal constructor(
     const val FIELD_POLICY = "fieldPolicy"
     const val NONNULL = "nonnull"
     const val OPTIONAL = "optional"
+    const val CATCH = "catch"
+    const val NULL_ONLY_ON_ERROR = "nullOnlyOnError"
     const val REQUIRES_OPT_IN = "requiresOptIn"
 
     const val FIELD_POLICY_FOR_FIELD = "forField"
diff --git a/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/gqldirective.kt b/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/gqldirective.kt
index 9676f62b61c..3b34b080394 100644
--- a/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/gqldirective.kt
+++ b/libraries/apollo-ast/src/commonMain/kotlin/com/apollographql/apollo3/ast/gqldirective.kt
@@ -70,5 +70,34 @@ fun List<GQLDirective>.optionalValue(schema: Schema?): Boolean? {
   return argument == null || argument.name == "if" && (argument.value as GQLBooleanValue).value
 }
 
+@ApolloInternal
+fun List<GQLDirective>.findCatchLevels(schema: Schema): List<Int?> {
+  return filter {
+    schema.originalDirectiveName(it.name) == Schema.CATCH
+  }.map {
+    val argument = it.arguments.firstOrNull { it.name == "level" }
+    if (argument == null) {
+       null
+    } else {
+      (argument.value as? GQLIntValue)?.value ?: error("bad @catch directive")
+    }
+  }
+}
+
+@ApolloInternal
+fun List<GQLDirective>.findNullOnlyOnErrorLevels(schema: Schema): List<Int?> {
+  return filter {
+    schema.originalDirectiveName(it.name) == Schema.NULL_ONLY_ON_ERROR
+  }.map {
+    val argument = it.arguments.firstOrNull { it.name == "level" }
+    if (argument == null) {
+      null
+    } else {
+      (argument.value as? GQLIntValue)?.value ?: error("bad @nullOnlyOnError directive")
+    }
+  }
+}
+
+
 @ApolloInternal
 fun List<GQLDirective>.findNonnull(schema: Schema) = any { schema.originalDirectiveName(it.name) == Schema.NONNULL }
diff --git a/libraries/apollo-compiler/api/apollo-compiler.api b/libraries/apollo-compiler/api/apollo-compiler.api
index 9d3a26b2a88..6b0134615e4 100644
--- a/libraries/apollo-compiler/api/apollo-compiler.api
+++ b/libraries/apollo-compiler/api/apollo-compiler.api
@@ -612,6 +612,34 @@ public final class com/apollographql/apollo3/compiler/ir/IrOptionalType$Companio
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
 }
 
+public final class com/apollographql/apollo3/compiler/ir/IrResultType : com/apollographql/apollo3/compiler/ir/IrType {
+	public static final field Companion Lcom/apollographql/apollo3/compiler/ir/IrResultType$Companion;
+	public fun <init> (Lcom/apollographql/apollo3/compiler/ir/IrType;)V
+	public final fun component1 ()Lcom/apollographql/apollo3/compiler/ir/IrType;
+	public final fun copy (Lcom/apollographql/apollo3/compiler/ir/IrType;)Lcom/apollographql/apollo3/compiler/ir/IrResultType;
+	public static synthetic fun copy$default (Lcom/apollographql/apollo3/compiler/ir/IrResultType;Lcom/apollographql/apollo3/compiler/ir/IrType;ILjava/lang/Object;)Lcom/apollographql/apollo3/compiler/ir/IrResultType;
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getOfType ()Lcom/apollographql/apollo3/compiler/ir/IrType;
+	public fun hashCode ()I
+	public fun rawType ()Lcom/apollographql/apollo3/compiler/ir/IrNamedType;
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class com/apollographql/apollo3/compiler/ir/IrResultType$$serializer : kotlinx/serialization/internal/GeneratedSerializer {
+	public static final field INSTANCE Lcom/apollographql/apollo3/compiler/ir/IrResultType$$serializer;
+	public fun childSerializers ()[Lkotlinx/serialization/KSerializer;
+	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcom/apollographql/apollo3/compiler/ir/IrResultType;
+	public synthetic fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Ljava/lang/Object;
+	public fun getDescriptor ()Lkotlinx/serialization/descriptors/SerialDescriptor;
+	public fun serialize (Lkotlinx/serialization/encoding/Encoder;Lcom/apollographql/apollo3/compiler/ir/IrResultType;)V
+	public synthetic fun serialize (Lkotlinx/serialization/encoding/Encoder;Ljava/lang/Object;)V
+	public fun typeParametersSerializers ()[Lkotlinx/serialization/KSerializer;
+}
+
+public final class com/apollographql/apollo3/compiler/ir/IrResultType$Companion {
+	public final fun serializer ()Lkotlinx/serialization/KSerializer;
+}
+
 public final class com/apollographql/apollo3/compiler/ir/IrScalarType : com/apollographql/apollo3/compiler/ir/IrNamedType, com/apollographql/apollo3/compiler/ir/IrType {
 	public static final field Companion Lcom/apollographql/apollo3/compiler/ir/IrScalarType$Companion;
 	public fun <init> (Ljava/lang/String;)V
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ApolloCompiler.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ApolloCompiler.kt
index 0ccde0f7358..eaef53d381f 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ApolloCompiler.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ApolloCompiler.kt
@@ -244,7 +244,8 @@ object ApolloCompiler {
         decapitalizeFields = options.decapitalizeFields,
         alwaysGenerateTypesMatching = options.alwaysGenerateTypesMatching,
         generateDataBuilders = options.codegenSchema.generateDataBuilders,
-        fragmentVariableUsages = validationResult.fragmentVariableUsages
+        fragmentVariableUsages = validationResult.fragmentVariableUsages,
+        enableCatchAndNullOnlyOnError = options.enableCatchAndNullOnlyOnError
     ).build()
   }
 
@@ -473,6 +474,7 @@ object ApolloCompiler {
         fieldsOnDisjointTypesMustMerge = fieldsOnDisjointTypesMustMerge,
         generateOptionalOperationVariables = generateOptionalOperationVariables,
         alwaysGenerateTypesMatching = alwaysGenerateTypesMatching,
+        enableCatchAndNullOnlyOnError = false
     )
 
     val irOperations = buildIrOperations(irOptions)
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/Options.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/Options.kt
index b3018546285..63637c5ea5b 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/Options.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/Options.kt
@@ -203,6 +203,8 @@ class IrOptions(
      * For input types, this will recursively add all input fields types/enums.
      */
     val alwaysGenerateTypesMatching: Set<String>,
+
+    val enableCatchAndNullOnlyOnError: Boolean
 )
 
 @ApolloExperimental
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/ClassNames.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/ClassNames.kt
index af357588cdd..73427b11c87 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/ClassNames.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/ClassNames.kt
@@ -23,6 +23,7 @@ internal object ClassNames {
   val Input = ResolverClassName(apolloApiPackageName, "Input")
   val CustomScalarAdaptersBuilder = ResolverClassName(apolloApiPackageName, "CustomScalarAdapters", "Builder")
   val Optional = ResolverClassName(apolloApiPackageName, "Optional")
+  val Result = ResolverClassName(apolloApiPackageName, "Result")
   val Absent = ResolverClassName(apolloApiPackageName, "Optional", "Absent")
   val Present = ResolverClassName(apolloApiPackageName, "Optional", "Present")
   val Adapter = ResolverClassName(apolloApiPackageName, "Adapter")
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/JavaResolver.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/JavaResolver.kt
index 16eca5cff78..c6849ea865e 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/JavaResolver.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/JavaResolver.kt
@@ -25,6 +25,7 @@ import com.apollographql.apollo3.compiler.ir.IrNonNullType
 import com.apollographql.apollo3.compiler.ir.IrNonNullType2
 import com.apollographql.apollo3.compiler.ir.IrObjectType
 import com.apollographql.apollo3.compiler.ir.IrOptionalType
+import com.apollographql.apollo3.compiler.ir.IrResultType
 import com.apollographql.apollo3.compiler.ir.IrScalarType
 import com.apollographql.apollo3.compiler.ir.IrScalarType2
 import com.apollographql.apollo3.compiler.ir.IrType
@@ -137,6 +138,7 @@ internal class JavaResolver(
       is IrModelType -> resolveAndAssert(ResolverKeyKind.Model, type.path)
       is IrScalarType -> resolveIrScalarType(type, asPrimitiveType = false)
       is IrNamedType -> resolveAndAssert(ResolverKeyKind.SchemaType, type.name)
+      is IrResultType -> error("Java codegen doesn't support @catch yet")
     }.let { if (wrapNullableFieldsInOptional) it.wrapInOptional() else it.addNullableAnnotation() }
   }
 
@@ -263,6 +265,7 @@ internal class JavaResolver(
       }
 
       is IrObjectType -> error("IrObjectType cannot be adapted")
+      is IrResultType -> error("Java codegen does not support @catch")
     }
   }
 
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/adapter/AdapterCommon.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/adapter/AdapterCommon.kt
index 2c905c0ef3e..2b3a9ba5849 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/adapter/AdapterCommon.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/java/adapter/AdapterCommon.kt
@@ -34,6 +34,7 @@ import com.apollographql.apollo3.compiler.ir.IrModelType
 import com.apollographql.apollo3.compiler.ir.IrNonNullType
 import com.apollographql.apollo3.compiler.ir.IrOptionalType
 import com.apollographql.apollo3.compiler.ir.IrProperty
+import com.apollographql.apollo3.compiler.ir.IrResultType
 import com.apollographql.apollo3.compiler.ir.IrType
 import com.apollographql.apollo3.compiler.ir.firstElementOfType
 import com.apollographql.apollo3.compiler.ir.isComposite
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinResolver.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinResolver.kt
index c0fa5326ec7..38353a3bb64 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinResolver.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinResolver.kt
@@ -23,6 +23,7 @@ import com.apollographql.apollo3.compiler.ir.IrNonNullType
 import com.apollographql.apollo3.compiler.ir.IrNonNullType2
 import com.apollographql.apollo3.compiler.ir.IrObjectType
 import com.apollographql.apollo3.compiler.ir.IrOptionalType
+import com.apollographql.apollo3.compiler.ir.IrResultType
 import com.apollographql.apollo3.compiler.ir.IrScalarType
 import com.apollographql.apollo3.compiler.ir.IrScalarType2
 import com.apollographql.apollo3.compiler.ir.IrType
@@ -76,7 +77,12 @@ internal class KotlinResolver(
     classNames.put(ResolverKey(kind, id), ClassName(memberName.packageName, memberName.simpleName))
   }
 
-  internal fun resolveIrType(type: IrType, jsExport: Boolean, isInterface: Boolean = false, override: (IrType) -> TypeName? = { null }): TypeName {
+  internal fun resolveIrType(
+      type: IrType,
+      jsExport: Boolean,
+      isInterface: Boolean = false,
+      override: (IrType) -> TypeName? = { null },
+  ): TypeName {
     if (type is IrNonNullType) {
       return resolveIrType(type.ofType, jsExport, isInterface, override = override).copy(nullable = false)
     }
@@ -87,6 +93,7 @@ internal class KotlinResolver(
 
     return when (type) {
       is IrOptionalType -> KotlinSymbols.Optional.parameterizedBy(resolveIrType(type.ofType, jsExport, isInterface, override = override))
+      is IrResultType -> KotlinSymbols.Result.parameterizedBy(resolveIrType(type.ofType, jsExport, isInterface, override = override))
       is IrListType -> toListType(resolveIrType(type.ofType, jsExport, isInterface, override), jsExport, isInterface)
       is IrScalarType -> resolveIrScalarType(type)
       is IrModelType -> resolveAndAssert(ResolverKeyKind.Model, type.path)
@@ -212,7 +219,12 @@ internal class KotlinResolver(
     return CodeBlock.of("%T.$type", resolveAndAssert(ResolverKeyKind.SchemaType, name))
   }
 
-  private fun nonNullableAdapterInitializer(type: IrType, requiresBuffering: Boolean, jsExport: Boolean, runtimeAdapterPrefix: String): CodeBlock {
+  private fun nonNullableAdapterInitializer(
+      type: IrType,
+      requiresBuffering: Boolean,
+      jsExport: Boolean,
+      runtimeAdapterPrefix: String,
+  ): CodeBlock {
     return when (type) {
       is IrNonNullType -> error("")
       is IrListType -> {
@@ -244,6 +256,19 @@ internal class KotlinResolver(
         CodeBlock.of("%L.%M()", adapterInitializer(type.ofType, requiresBuffering, jsExport, runtimeAdapterPrefix), presentFun)
       }
 
+      is IrResultType -> {
+        val param = when (type.ofType.rawType()) {
+          is IrModelType, is IrInputObjectType -> {
+            ""
+          }
+
+          else -> {
+            "adapterContext"
+          }
+        }
+        CodeBlock.of("%L.%M($param)", adapterInitializer(type.ofType, requiresBuffering, jsExport, runtimeAdapterPrefix), KotlinSymbols.resultAdapter)
+      }
+
       is IrObjectType -> error("IrObjectType cannot be adapted")
     }
   }
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinSymbols.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinSymbols.kt
index d9c8409fbfe..f1c55953c1e 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinSymbols.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/KotlinSymbols.kt
@@ -32,6 +32,7 @@ internal object KotlinSymbols {
   val CustomScalarAdapters = ClassNames.CustomScalarAdapters.toKotlinPoetClassName()
   val CustomScalarAdaptersBuilder = ClassNames.CustomScalarAdaptersBuilder.toKotlinPoetClassName()
   val Optional = ClassNames.Optional.toKotlinPoetClassName()
+  val Result = ClassNames.Result.toKotlinPoetClassName()
   val Absent = ClassNames.Absent.toKotlinPoetClassName()
   val Present = ClassNames.Present.toKotlinPoetClassName()
   val Adapter = ClassNames.Adapter.toKotlinPoetClassName()
@@ -112,6 +113,10 @@ internal object KotlinSymbols {
   val ApolloExperimental = ClassName(ClassNames.apolloAnnotationsPackageName, "ApolloExperimental")
 
   val JsExport = ClassName("kotlin.js", "JsExport")
+
+  val missingFieldResult = MemberName(apolloApiPackageName, "missingFieldResult")
+  val missingField = MemberName(apolloApiPackageName, "missingField")
+  val resultAdapter = MemberName(apolloApiPackageName, "result")
 }
 
 internal fun ResolverClassName.toKotlinPoetClassName(): ClassName = ClassName(packageName, simpleNames)
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/adapter/AdapterCommon.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/adapter/AdapterCommon.kt
index 580105a23de..ef7c8f2a44c 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/adapter/AdapterCommon.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/codegen/kotlin/adapter/AdapterCommon.kt
@@ -23,12 +23,12 @@ import com.apollographql.apollo3.compiler.ir.BooleanExpression
 import com.apollographql.apollo3.compiler.ir.IrModel
 import com.apollographql.apollo3.compiler.ir.IrModelType
 import com.apollographql.apollo3.compiler.ir.IrNonNullType
-import com.apollographql.apollo3.compiler.ir.IrOptionalType
 import com.apollographql.apollo3.compiler.ir.IrProperty
 import com.apollographql.apollo3.compiler.ir.IrType
 import com.apollographql.apollo3.compiler.ir.firstElementOfType
 import com.apollographql.apollo3.compiler.ir.isComposite
 import com.apollographql.apollo3.compiler.ir.isOptional
+import com.apollographql.apollo3.compiler.ir.isResult
 import com.squareup.kotlinpoet.ClassName
 import com.squareup.kotlinpoet.CodeBlock
 import com.squareup.kotlinpoet.MemberName
@@ -49,14 +49,13 @@ internal fun readFromResponseCodeBlock(
   val prefix = regularProperties.map { property ->
     val variableInitializer = when {
       useTypenameFromArgument && property.info.responseName == "__typename" -> CodeBlock.of(typename)
-      (property.info.type is IrNonNullType && property.info.type.ofType is IrOptionalType) -> CodeBlock.of("%T", KotlinSymbols.Absent)
       else -> CodeBlock.of("null")
     }
 
     CodeBlock.of(
         "var·%N:·%T·=·%L",
         context.layout.variableName(property.info.responseName),
-        context.resolver.resolveIrType(property.info.type, context.jsExport).copy(nullable = !property.info.type.isOptional()),
+        context.resolver.resolveIrType(property.info.type, context.jsExport).copy(nullable = true),
         variableInitializer
     )
   }.joinToCode(separator = "\n", suffix = "\n")
@@ -174,15 +173,17 @@ internal fun readFromResponseCodeBlock(
       .addStatement("return·%T(", context.resolver.resolveModel(model.id))
       .indent()
       .add(model.properties.map { property ->
-        val maybeAssertNotNull = if (
-            property.info.type is IrNonNullType
-            && !property.info.type.isOptional()
-            && !checkedProperties.contains(property.info.responseName)
-        ) {
-          "!!"
-        } else {
-          ""
+
+        val maybeAssertNotNull = when {
+          // Type is nullable, no need to assert
+          property.info.type !is IrNonNullType -> CodeBlock.of("")
+          property.info.type.isOptional() -> CodeBlock.of("·?:·%T", KotlinSymbols.Absent)
+          property.info.type.isResult() -> CodeBlock.of("·?:·%M(reader,·adapterContext)", KotlinSymbols.missingFieldResult)
+          // Type is non-null but was already checked by the code above
+          checkedProperties.contains(property.info.responseName) -> CodeBlock.of("")
+          else -> CodeBlock.of("·?:·%M(reader,·%S)", KotlinSymbols.missingField, property.info.responseName)
         }
+
         CodeBlock.of(
             "%N·=·%N%L",
             context.layout.propertyName(property.info.responseName),
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrOperationsBuilder.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrOperationsBuilder.kt
index fa23e663465..afd169dd1cd 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrOperationsBuilder.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrOperationsBuilder.kt
@@ -34,8 +34,10 @@ import com.apollographql.apollo3.ast.VariableUsage
 import com.apollographql.apollo3.ast.coerceInSchemaContextOrThrow
 import com.apollographql.apollo3.ast.definitionFromScope
 import com.apollographql.apollo3.ast.fieldDefinitions
+import com.apollographql.apollo3.ast.findCatchLevels
 import com.apollographql.apollo3.ast.findDeprecationReason
 import com.apollographql.apollo3.ast.findNonnull
+import com.apollographql.apollo3.ast.findNullOnlyOnErrorLevels
 import com.apollographql.apollo3.ast.findOptInFeature
 import com.apollographql.apollo3.ast.isFieldNonNull
 import com.apollographql.apollo3.ast.optionalValue
@@ -62,6 +64,7 @@ internal class IrOperationsBuilder(
     private val alwaysGenerateTypesMatching: Set<String>,
     private val generateDataBuilders: Boolean,
     private val fragmentVariableUsages: Map<String, List<VariableUsage>>,
+    private val enableCatchAndNullOnlyOnError: Boolean,
 ) : FieldMerger {
   private val usedFields = mutableMapOf<String, MutableSet<String>>()
   private val responseBasedBuilder = ResponseBasedModelGroupBuilder(
@@ -101,7 +104,7 @@ internal class IrOperationsBuilder(
      */
     val visitedTypes = mutableSetOf<String>()
     val typesToVisit = usedFields.keys.toMutableList()
-    while(typesToVisit.isNotEmpty()) {
+    while (typesToVisit.isNotEmpty()) {
       val name = typesToVisit.removeFirst()
       if (visitedTypes.contains(name)) {
         continue
@@ -195,15 +198,16 @@ internal class IrOperationsBuilder(
            *   }
            * }
            */
-            typeDefinition.memberTypes.forEach {
-              if (generateDataBuilders) {
-                usedFields.putAllFields(it.name, usedFields[name].orEmpty())
-              } else {
-                usedFields.putType(it.name)
-              }
-              typesToVisit.add(it.name)
+          typeDefinition.memberTypes.forEach {
+            if (generateDataBuilders) {
+              usedFields.putAllFields(it.name, usedFields[name].orEmpty())
+            } else {
+              usedFields.putType(it.name)
             }
+            typesToVisit.add(it.name)
+          }
         }
+
         is GQLInputObjectTypeDefinition -> {
           /**
            * Loop on the input types.
@@ -217,6 +221,7 @@ internal class IrOperationsBuilder(
                 typesToVisit.add(fieldType.name)
                 usedFields.putType(fieldType.name)
               }
+
               is GQLEnumTypeDefinition -> {
                 typesToVisit.add(fieldType.name)
                 usedFields.putType(fieldType.name)
@@ -473,11 +478,13 @@ internal class IrOperationsBuilder(
 
       val description: String?,
       val type: GQLType,
+      val nullOnlyOnErrorLevels: List<Int?>,
       val nullability: GQLNullability?,
       val deprecationReason: String?,
       val optInFeature: String?,
       val forceNonNull: Boolean,
       val forceOptional: Boolean,
+      val catchLevels: List<Int?>,
 
       /**
        * Merged field will merge their conditions and selectionSets
@@ -507,12 +514,26 @@ internal class IrOperationsBuilder(
           selections = gqlField.selections,
           type = fieldDefinition.type,
           nullability = gqlField.nullability,
+          nullOnlyOnErrorLevels = fieldDefinition.directives.findNullOnlyOnErrorLevels(schema).also {
+            if (!enableCatchAndNullOnlyOnError) {
+              check(it.isEmpty()) {
+                "@catch and @nullOnlyOnError are experimental features, you need to opt-in with enableCatchAndNullOnlyOnError.set(true)"
+              }
+            }
+          },
           description = fieldDefinition.description,
           deprecationReason = fieldDefinition.directives.findDeprecationReason(),
           optInFeature = fieldDefinition.directives.findOptInFeature(schema),
           forceNonNull = forceNonNull,
           forceOptional = gqlField.directives.optionalValue(schema) == true,
           parentType = fieldWithParent.parentType,
+          catchLevels = gqlField.directives.findCatchLevels(schema).also {
+            if (!enableCatchAndNullOnlyOnError) {
+              check(it.isEmpty()) {
+                "@catch and @nullOnlyOnError are experimental features, you need to opt-in with enableCatchAndNullOnlyOnError.set(true)"
+              }
+            }
+          },
       )
     }.groupBy {
       it.responseName
@@ -582,7 +603,14 @@ internal class IrOperationsBuilder(
        */
       usedFields.putType(first.type.rawType().name)
 
-      var irType = first.type.withNullability(first.nullability).toIr()
+      var irType = first
+          .type
+          .withNullability(first.nullability)
+          .toIr()
+          .nooe(first.nullOnlyOnErrorLevels, 0)
+          .catch(first.catchLevels, 0)
+
+
       if (forceNonNull) {
         irType = irType.makeNonNull()
       } else if (forceOptional) {
@@ -698,6 +726,48 @@ internal class IrOperationsBuilder(
   }
 }
 
+private fun IrType.nooe2(nullOnlyOnErrorLevels: List<Int?>, level: Int): IrType {
+  return when (this) {
+    is IrNamedType -> this
+    is IrListType -> IrListType(ofType.nooe(nullOnlyOnErrorLevels, level + 1))
+    is IrNonNullType -> error("")
+    is IrOptionalType -> error("")
+    is IrResultType -> error("")
+  }
+}
+
+private fun IrType.nooe(nullOnlyOnErrorLevels: List<Int?>, level: Int): IrType {
+  val shouldWrap = nullOnlyOnErrorLevels.any { it == null || it == level }
+
+  if (this is IrNonNullType) {
+    return IrNonNullType(ofType.nooe2(nullOnlyOnErrorLevels, level))
+  } else if (!shouldWrap) {
+    return this.nooe2(nullOnlyOnErrorLevels, level)
+  } else {
+    return IrNonNullType(this.nooe2(nullOnlyOnErrorLevels, level))
+  }
+}
+
+private fun IrType.catch2(catchLevels: List<Int?>, level: Int): IrType {
+  return when (this) {
+    is IrNamedType -> this
+    is IrListType -> IrListType(ofType.catch(catchLevels, level + 1))
+    is IrNonNullType -> IrNonNullType(ofType.catch2(catchLevels, level))
+    is IrOptionalType -> error("")
+    is IrResultType -> error("")
+  }
+}
+
+private fun IrType.catch(catchLevels: List<Int?>, level: Int): IrType {
+  val shouldWrap = catchLevels.any { it == null || it == level }
+
+  return if (shouldWrap) {
+    IrNonNullType(IrResultType(this.catch2(catchLevels, level)))
+  } else {
+    this.catch2(catchLevels, level)
+  }
+}
+
 internal fun GQLValue.toIrValue(): IrValue {
   return when (this) {
     is GQLIntValue -> IrIntValue(value = value)
diff --git a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrType.kt b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrType.kt
index d2e05058b09..f6202efd45a 100644
--- a/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrType.kt
+++ b/libraries/apollo-compiler/src/main/kotlin/com/apollographql/apollo3/compiler/ir/IrType.kt
@@ -36,6 +36,12 @@ data class IrOptionalType(val ofType: IrType) : IrType {
   override fun rawType() = ofType.rawType()
 }
 
+@Serializable
+@SerialName("result")
+data class IrResultType(val ofType: IrType) : IrType {
+  override fun rawType() = ofType.rawType()
+}
+
 @Serializable
 @SerialName("list")
 data class IrListType(val ofType: IrType) : IrType {
@@ -105,6 +111,8 @@ internal const val MODEL_FRAGMENT_INTERFACE = "fragmentInterface"
 internal const val MODEL_UNKNOWN = "?"
 
 internal fun IrType.makeOptional(): IrType = IrNonNullType(IrOptionalType(this))
+internal fun IrType.makeResult(): IrType = IrNonNullType(IrResultType(this))
+
 internal fun IrType.makeNullable(): IrType = if (this is IrNonNullType) {
   this.ofType.makeNullable()
 } else {
@@ -118,6 +126,7 @@ internal fun IrType.makeNonNull(): IrType = if (this is IrNonNullType) {
 }
 
 internal fun IrType.isOptional() = (this is IrNonNullType) && (this.ofType is IrOptionalType)
+internal fun IrType.isResult() = (this is IrNonNullType) && (this.ofType is IrResultType)
 
 internal fun IrType.makeNonOptional(): IrType {
   return ((this as? IrNonNullType)?.ofType as? IrOptionalType)?.ofType ?: error("${Identifier.type} is not an optional type")
@@ -129,6 +138,7 @@ internal fun IrType.replacePlaceholder(newPath: String): IrType {
     is IrNonNullType -> IrNonNullType(ofType = ofType.replacePlaceholder(newPath))
     is IrListType -> IrListType(ofType = ofType.replacePlaceholder(newPath))
     is IrModelType -> copy(path = newPath)
+    is IrResultType -> copy(ofType = ofType.replacePlaceholder(newPath))
     else -> error("Not a compound type?")
   }
 }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/arguments_hardcoded/kotlin/responseBased/arguments_hardcoded/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/arguments_hardcoded/kotlin/responseBased/arguments_hardcoded/adapter/TestQuery_ResponseAdapter.kt.expected
index b6ebe03673f..344f02bcae9 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/arguments_hardcoded/kotlin/responseBased/arguments_hardcoded/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/arguments_hardcoded/kotlin/responseBased/arguments_hardcoded/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.arguments_hardcoded.TestQuery
@@ -39,7 +40,7 @@ public object TestQuery_ResponseAdapter {
 
       return TestQuery.Data(
         reviews = _reviews,
-        testNullableArguments = _testNullableArguments!!
+        testNullableArguments = _testNullableArguments ?: missingField(reader, "testNullableArguments")
       )
     }
 
@@ -72,7 +73,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Review(
-          stars = _stars!!,
+          stars = _stars ?: missingField(reader, "stars"),
           commentary = _commentary
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/big_query/kotlin/responseBased/big_query/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/big_query/kotlin/responseBased/big_query/adapter/TestQuery_ResponseAdapter.kt.expected
index 863de8b7dd3..25c76df563b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/big_query/kotlin/responseBased/big_query/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/big_query/kotlin/responseBased/big_query/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.big_query.TestQuery
@@ -61,7 +62,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Character(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/operationBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/operationBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index 09959f8d161..3053bcb669a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/operationBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/operationBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.capitalized_fields.TestQuery
@@ -69,7 +70,7 @@ public object TestQuery_ResponseAdapter {
           adapterContext)
 
       return TestQuery.Horse(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         Donkey = _Donkey,
         onHorse = _onHorse
       )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/responseBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/responseBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index a29b58b6523..8505c80aa1c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/responseBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/capitalized_fields/kotlin/responseBased/capitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.capitalized_fields.TestQuery
@@ -67,7 +68,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Horse(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         Donkey = _Donkey,
         Cow = _Cow
       )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/companion/kotlin/operationBased/companion/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/companion/kotlin/operationBased/companion/adapter/TestQuery_ResponseAdapter.kt.expected
index 9c3d2d5e3db..128cf204797 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/companion/kotlin/operationBased/companion/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/companion/kotlin/operationBased/companion/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.`companion`.TestQuery
@@ -63,7 +64,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Companion_(
-        foo = _foo!!
+        foo = _foo ?: missingField(reader, "foo")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/custom_scalar_type/kotlin/responseBased/custom_scalar_type/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/custom_scalar_type/kotlin/responseBased/custom_scalar_type/adapter/TestQuery_ResponseAdapter.kt.expected
index b0dbbe66565..d399ba7dc67 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/custom_scalar_type/kotlin/responseBased/custom_scalar_type/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/custom_scalar_type/kotlin/responseBased/custom_scalar_type/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.custom_scalar_type.TestQuery
@@ -80,13 +81,13 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          id = _id!!,
-          name = _name!!,
-          birthDate = _birthDate!!,
-          appearanceDates = _appearanceDates!!,
-          fieldWithUnsupportedType = _fieldWithUnsupportedType!!,
-          profileLink = _profileLink!!,
-          links = _links!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate"),
+          appearanceDates = _appearanceDates ?: missingField(reader, "appearanceDates"),
+          fieldWithUnsupportedType = _fieldWithUnsupportedType ?: missingField(reader, "fieldWithUnsupportedType"),
+          profileLink = _profileLink ?: missingField(reader, "profileLink"),
+          links = _links ?: missingField(reader, "links")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
index a27b6becbd8..56c0457b19e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.data_builders.AnimalQuery
@@ -36,7 +37,7 @@ public object AnimalQuery_ResponseAdapter {
       }
 
       return AnimalQuery.Data(
-        animal = _animal!!
+        animal = _animal ?: missingField(reader, "animal")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
index da6a0d14edb..7d1f2ea56cb 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.data_builders.CharacterQuery
@@ -36,7 +37,7 @@ public object CharacterQuery_ResponseAdapter {
       }
 
       return CharacterQuery.Data(
-        character = _character!!
+        character = _character ?: missingField(reader, "character")
       )
     }
 
@@ -87,8 +88,8 @@ public object CharacterQuery_ResponseAdapter {
 
         return CharacterQuery.Data.Character(
           __typename = __typename,
-          id = _id!!,
-          name = _name!!,
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
           humanFragment = _humanFragment,
           droidFragment = _droidFragment
         )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
index e262560c590..bb347a11373 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.data_builders.NodeQuery
@@ -36,7 +37,7 @@ public object NodeQuery_ResponseAdapter {
       }
 
       return NodeQuery.Data(
-        node = _node!!
+        node = _node ?: missingField(reader, "node")
       )
     }
 
@@ -85,7 +86,7 @@ public object NodeQuery_ResponseAdapter {
 
         return NodeQuery.Data.Node(
           __typename = __typename,
-          id = _id!!,
+          id = _id ?: missingField(reader, "id"),
           humanFragment = _humanFragment,
           droidFragment = _droidFragment
         )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
index c8ba1803801..121a99f06a5 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object CatFragmentImpl_ResponseAdapter {
       }
 
       return com.example.data_builders.fragment.CatFragment(
-        meow = _meow!!
+        meow = _meow ?: missingField(reader, "meow")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
index 4fa19f2738d..a396372ff92 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DogFragmentImpl_ResponseAdapter {
       }
 
       return com.example.data_builders.fragment.DogFragment(
-        woof = _woof!!
+        woof = _woof ?: missingField(reader, "woof")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
index 741c5faad65..d461e261900 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DroidFragmentImpl_ResponseAdapter {
       }
 
       return com.example.data_builders.fragment.DroidFragment(
-        primaryFunction = _primaryFunction!!
+        primaryFunction = _primaryFunction ?: missingField(reader, "primaryFunction")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
index 6cb4b6b7f8f..307cb508b5c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/operationBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object HumanFragmentImpl_ResponseAdapter {
       }
 
       return com.example.data_builders.fragment.HumanFragment(
-        homePlanet = _homePlanet!!
+        homePlanet = _homePlanet ?: missingField(reader, "homePlanet")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
index 5d3bde9cd65..e745183c9ae 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/AnimalQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.data_builders.AnimalQuery
 import kotlin.String
@@ -34,7 +35,7 @@ public object AnimalQuery_ResponseAdapter {
       }
 
       return AnimalQuery.Data(
-        animal = _animal!!
+        animal = _animal ?: missingField(reader, "animal")
       )
     }
 
@@ -94,8 +95,8 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.CatAnimal(
-          __typename = __typename!!,
-          meow = _meow!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          meow = _meow ?: missingField(reader, "meow")
         )
       }
 
@@ -132,8 +133,8 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.DogAnimal(
-          __typename = __typename!!,
-          woof = _woof!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          woof = _woof ?: missingField(reader, "woof")
         )
       }
 
@@ -168,7 +169,7 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.OtherAnimal(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
index c4087f00ef8..ce3da580234 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/CharacterQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.data_builders.CharacterQuery
 import kotlin.String
@@ -34,7 +35,7 @@ public object CharacterQuery_ResponseAdapter {
       }
 
       return CharacterQuery.Data(
-        character = _character!!
+        character = _character ?: missingField(reader, "character")
       )
     }
 
@@ -101,10 +102,10 @@ public object CharacterQuery_ResponseAdapter {
         }
 
         return CharacterQuery.Data.HumanCharacter(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!,
-          homePlanet = _homePlanet!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          homePlanet = _homePlanet ?: missingField(reader, "homePlanet")
         )
       }
 
@@ -152,10 +153,10 @@ public object CharacterQuery_ResponseAdapter {
         }
 
         return CharacterQuery.Data.DroidCharacter(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!,
-          primaryFunction = _primaryFunction!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          primaryFunction = _primaryFunction ?: missingField(reader, "primaryFunction")
         )
       }
 
@@ -200,9 +201,9 @@ public object CharacterQuery_ResponseAdapter {
         }
 
         return CharacterQuery.Data.OtherCharacter(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
index a8f5e798d4d..f81a8530a6b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/adapter/NodeQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.data_builders.NodeQuery
 import kotlin.String
@@ -34,7 +35,7 @@ public object NodeQuery_ResponseAdapter {
       }
 
       return NodeQuery.Data(
-        node = _node!!
+        node = _node ?: missingField(reader, "node")
       )
     }
 
@@ -96,9 +97,9 @@ public object NodeQuery_ResponseAdapter {
         }
 
         return NodeQuery.Data.HumanNode(
-          __typename = __typename!!,
-          id = _id!!,
-          homePlanet = _homePlanet!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          homePlanet = _homePlanet ?: missingField(reader, "homePlanet")
         )
       }
 
@@ -140,9 +141,9 @@ public object NodeQuery_ResponseAdapter {
         }
 
         return NodeQuery.Data.DroidNode(
-          __typename = __typename!!,
-          id = _id!!,
-          primaryFunction = _primaryFunction!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          primaryFunction = _primaryFunction ?: missingField(reader, "primaryFunction")
         )
       }
 
@@ -182,8 +183,8 @@ public object NodeQuery_ResponseAdapter {
         }
 
         return NodeQuery.Data.OtherNode(
-          __typename = __typename!!,
-          id = _id!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
index ced0f5867ab..c68e46a71ba 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object CatFragmentImpl_ResponseAdapter {
       }
 
       return CatFragmentImpl.Data(
-        meow = _meow!!
+        meow = _meow ?: missingField(reader, "meow")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
index a4feaa29364..01deb6981d8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DogFragmentImpl_ResponseAdapter {
       }
 
       return DogFragmentImpl.Data(
-        woof = _woof!!
+        woof = _woof ?: missingField(reader, "woof")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
index 02e2607e1fd..ee72276e067 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DroidFragmentImpl_ResponseAdapter {
       }
 
       return DroidFragmentImpl.Data(
-        primaryFunction = _primaryFunction!!
+        primaryFunction = _primaryFunction ?: missingField(reader, "primaryFunction")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
index 4ca71f5778f..7baa4fcdfd1 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/data_builders/kotlin/responseBased/data_builders/fragment/HumanFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object HumanFragmentImpl_ResponseAdapter {
       }
 
       return HumanFragmentImpl.Data(
-        homePlanet = _homePlanet!!
+        homePlanet = _homePlanet ?: missingField(reader, "homePlanet")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/operationBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/operationBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index 182329387ff..b29af665193 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/operationBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/operationBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.decapitalized_fields.TestQuery
@@ -72,7 +73,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Horse(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           donkey = _Donkey,
           onHorse = _onHorse,
           horseFragment = _horseFragment
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/responseBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/responseBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index 3a9bbe7a197..fc7b12724a8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/responseBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/decapitalized_fields/kotlin/responseBased/decapitalized_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.decapitalized_fields.TestQuery
@@ -66,7 +67,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Horse(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           donkey = _Donkey,
           cow = _Cow
         )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
index ae9277ab22f..93259e9705a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.deprecated_merged_field.CatQuery
@@ -65,7 +66,7 @@ public object CatQuery_ResponseAdapter {
             adapterContext)
 
         return CatQuery.Data.Cat(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           animalFragment = _animalFragment
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
index 17f9c2547ff..958e08c5983 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/operationBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.possibleTypes
 import kotlin.String
 import kotlin.Suppress
@@ -93,7 +94,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
         }
 
         return com.example.deprecated_merged_field.fragment.AnimalFragment.OnCat(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -123,7 +124,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
         }
 
         return com.example.deprecated_merged_field.fragment.AnimalFragment.OnDog(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
index fed2736429c..983d14dba82 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/adapter/CatQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.deprecated_merged_field.CatQuery
@@ -90,7 +91,7 @@ public object CatQuery_ResponseAdapter {
         }
 
         return CatQuery.Data.OtherCat(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -124,8 +125,8 @@ public object CatQuery_ResponseAdapter {
         }
 
         return CatQuery.Data.OtherAnimalCat(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
index 113dd5036cd..2cdf6ba97e6 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/deprecated_merged_field/kotlin/responseBased/deprecated_merged_field/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.Suppress
 import kotlin.collections.List
@@ -64,8 +65,8 @@ public object AnimalFragmentImpl_ResponseAdapter {
       }
 
       return AnimalFragmentImpl.CatData(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
@@ -102,8 +103,8 @@ public object AnimalFragmentImpl_ResponseAdapter {
       }
 
       return AnimalFragmentImpl.DogData(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
@@ -139,7 +140,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
       }
 
       return AnimalFragmentImpl.OtherData(
-        __typename = __typename!!
+        __typename = __typename ?: missingField(reader, "__typename")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/deprecation/kotlin/responseBased/deprecation/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/deprecation/kotlin/responseBased/deprecation/adapter/TestQuery_ResponseAdapter.kt.expected
index 7296ed46172..41f1cb5f8b3 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/deprecation/kotlin/responseBased/deprecation/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/deprecation/kotlin/responseBased/deprecation/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.deprecation.TestQuery
@@ -68,9 +69,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!,
-          deprecated = _deprecated!!,
-          deprecatedBool = _deprecatedBool!!
+          name = _name ?: missingField(reader, "name"),
+          deprecated = _deprecated ?: missingField(reader, "deprecated"),
+          deprecatedBool = _deprecatedBool ?: missingField(reader, "deprecatedBool")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fieldset_with_multiple_super/kotlin/responseBased/fieldset_with_multiple_super/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fieldset_with_multiple_super/kotlin/responseBased/fieldset_with_multiple_super/adapter/TestQuery_ResponseAdapter.kt.expected
index 60c290c4b22..4a8815aefe8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fieldset_with_multiple_super/kotlin/responseBased/fieldset_with_multiple_super/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fieldset_with_multiple_super/kotlin/responseBased/fieldset_with_multiple_super/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fieldset_with_multiple_super.TestQuery
@@ -106,7 +107,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.ABC(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA1 = _fieldA1,
           fieldB1 = _fieldB1,
           fieldB2 = _fieldB2,
@@ -154,7 +155,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherC(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -188,7 +189,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherAC(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA1 = _fieldA1
         )
       }
@@ -226,7 +227,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherBC(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldB2 = _fieldB2
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
index b84fffa28eb..b379483eea5 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.and
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.not
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
@@ -113,7 +114,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          id = _id!!,
+          id = _id ?: missingField(reader, "id"),
           heroDetails = _heroDetails,
           humanDetails = _humanDetails,
           droidDetails = _droidDetails,
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index da482359d8d..f3c9a46c821 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -31,7 +32,7 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_spread_with_include_directive.fragment.HeroDetails(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/OtherDroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/OtherDroidDetailsImpl_ResponseAdapter.kt.expected
index c30b652ac56..4240751b69a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/OtherDroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_include_directive/kotlin/operationBased/fragment_spread_with_include_directive/fragment/OtherDroidDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,7 +33,7 @@ public object OtherDroidDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_spread_with_include_directive.fragment.OtherDroidDetails(
-        id = _id!!
+        id = _id ?: missingField(reader, "id")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index da7fc23467f..2a2f379e923 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_spread_with_nested_fields.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           heroDetails = _heroDetails
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index 16389e3c35c..64bbfbf7cd5 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/operationBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
@@ -38,8 +39,8 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_spread_with_nested_fields.fragment.HeroDetails(
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -138,7 +139,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return com.example.fragment_spread_with_nested_fields.fragment.HeroDetails.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index 6257b6348d0..ca14bc47804 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_spread_with_nested_fields.TestQuery
@@ -68,9 +69,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -166,7 +167,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.Hero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index 5203edbbeaa..971c5bc64e7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_spread_with_nested_fields/kotlin/responseBased/fragment_spread_with_nested_fields/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
@@ -37,8 +38,8 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.Data(
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -131,7 +132,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return HeroDetailsImpl.Data.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
index b8d7bd6db98..78e0f871adf 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Any
 import kotlin.String
 import kotlin.collections.List
@@ -35,8 +36,8 @@ public object CharacterDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_used_twice.fragment.CharacterDetails(
-        name = _name!!,
-        birthDate = _birthDate!!
+        name = _name ?: missingField(reader, "name"),
+        birthDate = _birthDate ?: missingField(reader, "birthDate")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index 7ab9ae954ba..0afb4c22218 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -37,8 +38,8 @@ public object HeroDetailsImpl_ResponseAdapter {
           adapterContext)
 
       return com.example.fragment_used_twice.fragment.HeroDetails(
-        __typename = __typename!!,
-        name = _name!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
         characterDetails = _characterDetails
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 9f0ef8397f1..ba9a2a2750d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/operationBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -37,8 +38,8 @@ public object HumanDetailsImpl_ResponseAdapter {
           adapterContext)
 
       return com.example.fragment_used_twice.fragment.HumanDetails(
-        __typename = __typename!!,
-        name = _name!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
         characterDetails = _characterDetails
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/adapter/TestQuery_ResponseAdapter.kt.expected
index f41daa3f4e1..883d570e340 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_used_twice.TestQuery
@@ -96,9 +97,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
-          birthDate = _birthDate!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate")
         )
       }
 
@@ -140,9 +141,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!,
-          birthDate = _birthDate!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
index 7280134dd45..aae935de9ff 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Any
 import kotlin.String
 import kotlin.collections.List
@@ -34,8 +35,8 @@ public object CharacterDetailsImpl_ResponseAdapter {
       }
 
       return CharacterDetailsImpl.Data(
-        name = _name!!,
-        birthDate = _birthDate!!
+        name = _name ?: missingField(reader, "name"),
+        birthDate = _birthDate ?: missingField(reader, "birthDate")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index f5fa2f4b918..60522ac8c23 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Any
 import kotlin.String
 import kotlin.collections.List
@@ -36,9 +37,9 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.Data(
-        __typename = __typename!!,
-        name = _name!!,
-        birthDate = _birthDate!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
+        birthDate = _birthDate ?: missingField(reader, "birthDate")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 8797fe0e963..cf0be56a016 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_used_twice/kotlin/responseBased/fragment_used_twice/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import kotlin.Any
 import kotlin.String
 import kotlin.Suppress
@@ -65,9 +66,9 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.CharacterData(
-        __typename = __typename!!,
-        name = _name!!,
-        birthDate = _birthDate!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
+        birthDate = _birthDate ?: missingField(reader, "birthDate")
       )
     }
 
@@ -107,8 +108,8 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.OtherData(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 72c2e2fa836..bd8b46a946d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_with_inline_fragment.TestQuery
@@ -72,9 +73,9 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
-          appearsIn = _appearsIn!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn"),
           heroDetails = _heroDetails
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index 47cc8d1cc6f..540b83b967b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -34,7 +35,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_with_inline_fragment.fragment.DroidDetails(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index e1143cb4337..8ccc1ea318f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -61,8 +62,8 @@ public object HeroDetailsImpl_ResponseAdapter {
 
       return com.example.fragment_with_inline_fragment.fragment.HeroDetails(
         __typename = __typename,
-        name = _name!!,
-        friendsConnection = _friendsConnection!!,
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
         onDroid = _onDroid,
         humanDetails = _humanDetails
       )
@@ -176,7 +177,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return com.example.fragment_with_inline_fragment.fragment.HeroDetails.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
@@ -212,7 +213,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             adapterContext)
 
         return com.example.fragment_with_inline_fragment.fragment.HeroDetails.OnDroid(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           droidDetails = _droidDetails
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 1ec2cd880f8..f522579b7a3 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/operationBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -31,7 +32,7 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragment_with_inline_fragment.fragment.HumanDetails(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 6639aecff60..45d531add18 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_with_inline_fragment.TestQuery
@@ -106,10 +107,10 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!,
-          appearsIn = _appearsIn!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
         )
       }
 
@@ -211,7 +212,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.HumanHero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -255,11 +256,11 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction,
-          friendsConnection = _friendsConnection!!,
-          appearsIn = _appearsIn!!
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
         )
       }
 
@@ -364,7 +365,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.DroidHero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -406,10 +407,10 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!,
-          appearsIn = _appearsIn!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
         )
       }
 
@@ -511,7 +512,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.OtherHero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index c1b67e46425..f19ff0f9209 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -33,7 +34,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return DroidDetailsImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index 11b91a58f04..9047e0565c4 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
@@ -72,9 +73,9 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.HumanData(
-        __typename = __typename!!,
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -172,7 +173,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return HeroDetailsImpl.HumanData.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
@@ -214,10 +215,10 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.DroidData(
-        __typename = __typename!!,
-        name = _name!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction,
-        friendsConnection = _friendsConnection!!
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -318,7 +319,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return HeroDetailsImpl.DroidData.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
@@ -357,9 +358,9 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.OtherData(
-        __typename = __typename!!,
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -457,7 +458,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return HeroDetailsImpl.OtherData.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index e9db1a0b84a..59a61037ef4 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_inline_fragment/kotlin/responseBased/fragment_with_inline_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.Data(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/operationBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/operationBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
index 9ba062b78c9..fb86fa565ad 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/operationBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/operationBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_with_multiple_fieldsets.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.I(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           iFragment = _iFragment
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
index 198f2c6efc8..849e1e2f182 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragment_with_multiple_fieldsets.TestQuery
@@ -93,7 +94,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.AI(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA = _fieldA
         )
       }
@@ -129,7 +130,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherI(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/fragment/IFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/fragment/IFragmentImpl_ResponseAdapter.kt.expected
index 2c23f22597d..5f946e0ef40 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/fragment/IFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragment_with_multiple_fieldsets/kotlin/responseBased/fragment_with_multiple_fieldsets/fragment/IFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.Suppress
 import kotlin.collections.List
@@ -62,7 +63,7 @@ public object IFragmentImpl_ResponseAdapter {
       }
 
       return IFragmentImpl.AData(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         fieldA = _fieldA
       )
     }
@@ -98,7 +99,7 @@ public object IFragmentImpl_ResponseAdapter {
       }
 
       return IFragmentImpl.OtherData(
-        __typename = __typename!!
+        __typename = __typename ?: missingField(reader, "__typename")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/operationBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/operationBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
index 65d8964901d..2dcce8632eb 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/operationBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/operationBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -31,7 +32,7 @@ public object DroidDetails1Impl_ResponseAdapter {
       }
 
       return com.example.fragments_same_type_condition.fragment.DroidDetails1(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
index eb1ba8f735f..d8af29ba962 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragments_same_type_condition.TestQuery
@@ -95,8 +96,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -135,7 +136,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
index a38d58a91b7..e99919f027c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_same_type_condition/kotlin/responseBased/fragments_same_type_condition/fragment/DroidDetails1Impl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DroidDetails1Impl_ResponseAdapter {
       }
 
       return DroidDetails1Impl.Data(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferAndInclude_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferAndInclude_ResponseAdapter.kt.expected
index 2a83b2ea388..43f354d5f11 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferAndInclude_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferAndInclude_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.label
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.not
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
@@ -179,7 +180,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidIfCond1(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -209,7 +210,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidIfNotCond2(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
@@ -239,7 +240,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidDeferE_first(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -269,7 +270,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidDeferE_second(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
@@ -299,7 +300,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidDeferE_third(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -329,7 +330,7 @@ public object InlineMultipleWithDeferAndInclude_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferAndInclude.Data.Hero.OnDroidDeferE_fourth(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferWithIf_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferWithIf_ResponseAdapter.kt.expected
index 6a0bbde15f3..3e747671623 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferWithIf_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDeferWithIf_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.label
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.not
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
@@ -85,7 +86,7 @@ public object InlineMultipleWithDeferWithIf_ResponseAdapter {
         }
 
         return InlineMultipleWithDeferWithIf.Data.Hero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           onCharacter = _onCharacter,
           onCharacterDeferF_second = _onCharacterDeferF_second,
           onCharacterDeferF_third = _onCharacterDeferF_third
@@ -130,7 +131,7 @@ public object InlineMultipleWithDeferWithIf_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferWithIf.Data.Hero.OnCharacter(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
@@ -160,7 +161,7 @@ public object InlineMultipleWithDeferWithIf_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferWithIf.Data.Hero.OnCharacterDeferF_second(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -190,7 +191,7 @@ public object InlineMultipleWithDeferWithIf_ResponseAdapter {
           }
 
           return InlineMultipleWithDeferWithIf.Data.Hero.OnCharacterDeferF_third(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDefer_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDefer_ResponseAdapter.kt.expected
index 40bc03637ad..eb4f3cb2301 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDefer_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineMultipleWithDefer_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.label
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -125,7 +126,7 @@ public object InlineMultipleWithDefer_ResponseAdapter {
           }
 
           return InlineMultipleWithDefer.Data.Hero.OnDroidDeferD_first(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -155,7 +156,7 @@ public object InlineMultipleWithDefer_ResponseAdapter {
           }
 
           return InlineMultipleWithDefer.Data.Hero.OnDroidDeferD_second(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineSingleWithDefer_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineSingleWithDefer_ResponseAdapter.kt.expected
index ce7d78d465e..27950680b9b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineSingleWithDefer_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/adapter/InlineSingleWithDefer_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.label
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -111,7 +112,7 @@ public object InlineSingleWithDefer_ResponseAdapter {
           }
 
           return InlineSingleWithDefer.Data.Hero.OnDroid(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails2Impl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails2Impl_ResponseAdapter.kt.expected
index e0b240bfb60..ab5ce63da29 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails2Impl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails2Impl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,7 +33,7 @@ public object CharacterDetails2Impl_ResponseAdapter {
       }
 
       return com.example.fragments_with_defer_and_include_directives.fragment.CharacterDetails2(
-        id = _id!!
+        id = _id ?: missingField(reader, "id")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails3Impl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails3Impl_ResponseAdapter.kt.expected
index 1d820273717..0e2dc1f2691 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails3Impl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetails3Impl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CompositeAdapterContext
 import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Any
 import kotlin.String
 import kotlin.collections.List
@@ -33,7 +34,7 @@ public object CharacterDetails3Impl_ResponseAdapter {
       }
 
       return com.example.fragments_with_defer_and_include_directives.fragment.CharacterDetails3(
-        birthDate = _birthDate!!
+        birthDate = _birthDate ?: missingField(reader, "birthDate")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
index cbecad9596c..fbbbbc0f47b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/CharacterDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,7 +33,7 @@ public object CharacterDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragments_with_defer_and_include_directives.fragment.CharacterDetails(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index a7eb04cbb03..7e2ab2cb731 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_defer_and_include_directives/kotlin/operationBased/fragments_with_defer_and_include_directives/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,7 +33,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragments_with_defer_and_include_directives.fragment.DroidDetails(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index d1f3247b451..deb064a6d8a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -34,7 +35,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragments_with_type_condition.fragment.DroidDetails(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index d769326a8dc..75aa2bf3c41 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/operationBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableDoubleAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Double
 import kotlin.String
 import kotlin.collections.List
@@ -35,7 +36,7 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return com.example.fragments_with_type_condition.fragment.HumanDetails(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         height = _height
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
index 4aeb0861045..bc13d495b8f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.fragments_with_type_condition.TestQuery
@@ -106,8 +107,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanR2(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -150,8 +151,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidR2(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -190,7 +191,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherR2(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -253,8 +254,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanLuke(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -297,8 +298,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidLuke(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -337,7 +338,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherLuke(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index 82df612bc19..a0a501f38e8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -33,7 +34,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return DroidDetailsImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 5ef0c7df14f..1c48742c314 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/fragments_with_type_condition/kotlin/responseBased/fragments_with_type_condition/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableDoubleAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.Double
 import kotlin.String
 import kotlin.collections.List
@@ -34,7 +35,7 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         height = _height
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_details/kotlin/responseBased/hero_details/adapter/HeroDetails_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_details/kotlin/responseBased/hero_details/adapter/HeroDetails_ResponseAdapter.kt.expected
index ac82e3df4f1..fe818aba240 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_details/kotlin/responseBased/hero_details/adapter/HeroDetails_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_details/kotlin/responseBased/hero_details/adapter/HeroDetails_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.hero_details.HeroDetails
@@ -70,9 +71,9 @@ public object HeroDetails_ResponseAdapter {
         }
 
         return HeroDetails.Data.Hero(
-          type = _type!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!
+          type = _type ?: missingField(reader, "type"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -169,7 +170,7 @@ public object HeroDetails_ResponseAdapter {
               }
 
               return HeroDetails.Data.Hero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_details_semantic_naming/kotlin/responseBased/hero_details_semantic_naming/adapter/HeroDetailsQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_details_semantic_naming/kotlin/responseBased/hero_details_semantic_naming/adapter/HeroDetailsQuery_ResponseAdapter.kt.expected
index a387be859c1..e31476a3e1f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_details_semantic_naming/kotlin/responseBased/hero_details_semantic_naming/adapter/HeroDetailsQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_details_semantic_naming/kotlin/responseBased/hero_details_semantic_naming/adapter/HeroDetailsQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.hero_details_semantic_naming.HeroDetailsQuery
@@ -66,8 +67,8 @@ public object HeroDetailsQuery_ResponseAdapter {
         }
 
         return HeroDetailsQuery.Data.Hero(
-          name = _name!!,
-          friendsConnection = _friendsConnection!!
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -162,7 +163,7 @@ public object HeroDetailsQuery_ResponseAdapter {
               }
 
               return HeroDetailsQuery.Data.Hero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/operationBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/operationBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
index fc75d99c76c..4f78aa71540 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/operationBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/operationBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -82,8 +83,8 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          name = _name!!,
-          birthDate = _birthDate!!,
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate"),
           onDroid = _onDroid
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/responseBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/responseBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
index 6174fa66d10..16e8cbdfe74 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/responseBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name/kotlin/responseBased/hero_name/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.hero_name.TestQuery
@@ -100,9 +101,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
-          birthDate = _birthDate!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate"),
           primaryFunction = _primaryFunction
         )
       }
@@ -148,9 +149,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!,
-          birthDate = _birthDate!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          birthDate = _birthDate ?: missingField(reader, "birthDate")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name_query_long_name/kotlin/responseBased/hero_name_query_long_name/adapter/TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name_query_long_name/kotlin/responseBased/hero_name_query_long_name/adapter/TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName_ResponseAdapter.kt.expected
index 1ef30d32eb5..d4e6202ca4c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_name_query_long_name/kotlin/responseBased/hero_name_query_long_name/adapter/TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_name_query_long_name/kotlin/responseBased/hero_name_query_long_name/adapter/TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.hero_name_query_long_name.TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName
@@ -69,7 +70,7 @@ public object
         }
 
         return TestQueryWithAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName.Data.HeroAVeryAVeryAVeryAVeryAVeryAVeryAV(
-          nameAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName = _nameAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName!!
+          nameAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName = _nameAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName ?: missingField(reader, "nameAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryAVeryLongName")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/hero_with_review/kotlin/responseBased/hero_with_review/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/hero_with_review/kotlin/responseBased/hero_with_review/adapter/TestQuery_ResponseAdapter.kt.expected
index 8f18ae35393..8658266fea6 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/hero_with_review/kotlin/responseBased/hero_with_review/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/hero_with_review/kotlin/responseBased/hero_with_review/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.hero_with_review.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CreateReview(
-          stars = _stars!!,
+          stars = _stars ?: missingField(reader, "stars"),
           commentary = _commentary
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/operationBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/operationBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
index 054560a4093..67a0238e32e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/operationBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/operationBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.inline_fragment_for_non_optional_field.TestQuery
@@ -36,7 +37,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        nonOptionalHero = _nonOptionalHero!!
+        nonOptionalHero = _nonOptionalHero ?: missingField(reader, "nonOptionalHero")
       )
     }
 
@@ -78,7 +79,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.NonOptionalHero(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           onHuman = _onHuman
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/responseBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/responseBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
index e8fb9955539..0f769a46d75 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/responseBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_for_non_optional_field/kotlin/responseBased/inline_fragment_for_non_optional_field/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_for_non_optional_field.TestQuery
 import kotlin.Double
@@ -36,7 +37,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        nonOptionalHero = _nonOptionalHero!!
+        nonOptionalHero = _nonOptionalHero ?: missingField(reader, "nonOptionalHero")
       )
     }
 
@@ -97,8 +98,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanNonOptionalHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -139,8 +140,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherNonOptionalHero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/operationBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/operationBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 7677ad1c2f8..d5ed950620a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/operationBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/operationBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -131,7 +132,7 @@ public object TestQuery_ResponseAdapter {
 
           return TestQuery.Data.Search.OnCharacter(
             __typename = __typename,
-            name = _name!!,
+            name = _name ?: missingField(reader, "name"),
             onHuman = _onHuman,
             onDroid = _onDroid
           )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/responseBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/responseBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index fe6851ec851..3156bbcb353 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/responseBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_inside_inline_fragment/kotlin/responseBased/inline_fragment_inside_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_inside_inline_fragment.TestQuery
@@ -101,8 +102,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CharacterHumanSearch(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           homePlanet = _homePlanet
         )
       }
@@ -145,8 +146,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CharacterDroidSearch(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -185,7 +186,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherSearch(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/operationBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/operationBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
index 9632b3b5c0a..21a9d6ecfc2 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/operationBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/operationBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -16,6 +16,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.inline_fragment_intersection.TestOperation
@@ -42,7 +43,7 @@ public object TestOperation_ResponseAdapter {
       }
 
       return TestOperation.Data(
-        random = _random!!
+        random = _random ?: missingField(reader, "random")
       )
     }
 
@@ -144,8 +145,8 @@ public object TestOperation_ResponseAdapter {
 
           return TestOperation.Data.Random.OnBeing(
             __typename = __typename,
-            name = _name!!,
-            friends = _friends!!,
+            name = _name ?: missingField(reader, "name"),
+            friends = _friends ?: missingField(reader, "friends"),
             onHuman = _onHuman
           )
         }
@@ -199,7 +200,7 @@ public object TestOperation_ResponseAdapter {
 
             return TestOperation.Data.Random.OnBeing.Friend(
               __typename = __typename,
-              name = _name!!,
+              name = _name ?: missingField(reader, "name"),
               onWookie = _onWookie
             )
           }
@@ -270,7 +271,7 @@ public object TestOperation_ResponseAdapter {
 
             return TestOperation.Data.Random.OnBeing.OnHuman(
               profilePictureUrl = _profilePictureUrl,
-              friends = _friends!!
+              friends = _friends ?: missingField(reader, "friends")
             )
           }
 
@@ -355,7 +356,7 @@ public object TestOperation_ResponseAdapter {
                 }
 
                 return TestOperation.Data.Random.OnBeing.OnHuman.Friend.OnWookie(
-                  race = _race!!
+                  race = _race ?: missingField(reader, "race")
                 )
               }
 
@@ -389,8 +390,8 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.Random.OnWookie(
-            race = _race!!,
-            friends = _friends!!
+            race = _race ?: missingField(reader, "race"),
+            friends = _friends ?: missingField(reader, "friends")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/responseBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/responseBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
index 0aaa5488c67..61cfcfdb6dd 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/responseBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_intersection/kotlin/responseBased/inline_fragment_intersection/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -16,6 +16,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_intersection.TestOperation
 import com.example.inline_fragment_intersection.type.Race
@@ -42,7 +43,7 @@ public object TestOperation_ResponseAdapter {
       }
 
       return TestOperation.Data(
-        random = _random!!
+        random = _random ?: missingField(reader, "random")
       )
     }
 
@@ -109,9 +110,9 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.BeingHumanRandom(
-          __typename = __typename!!,
-          name = _name!!,
-          friends = _friends!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friends = _friends ?: missingField(reader, "friends"),
           profilePictureUrl = _profilePictureUrl
         )
       }
@@ -187,11 +188,11 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.BeingHumanRandom.WookieFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             lifeExpectancy = _lifeExpectancy,
             isFamous = _isFamous,
-            race = _race!!
+            race = _race ?: missingField(reader, "race")
           )
         }
 
@@ -239,8 +240,8 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.BeingHumanRandom.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             isFamous = _isFamous
           )
         }
@@ -286,10 +287,10 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.BeingWookieRandom(
-          __typename = __typename!!,
-          name = _name!!,
-          friends = _friends!!,
-          race = _race!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friends = _friends ?: missingField(reader, "friends"),
+          race = _race ?: missingField(reader, "race")
         )
       }
 
@@ -359,8 +360,8 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.BeingWookieRandom.WookieFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             lifeExpectancy = _lifeExpectancy
           )
         }
@@ -403,8 +404,8 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.BeingWookieRandom.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             lifeExpectancy = _lifeExpectancy
           )
         }
@@ -444,7 +445,7 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.OtherRandom(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/operationBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/operationBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index f72a955a1d0..ed9bc69afe8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/operationBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/operationBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_merge_fields.TestQuery
@@ -72,9 +73,9 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
           onCharacter = _onCharacter
         )
       }
@@ -168,7 +169,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.Hero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -203,9 +204,9 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OnCharacter(
-            name = _name!!,
-            profileLink = _profileLink!!,
-            friendsConnection = _friendsConnection!!
+            name = _name ?: missingField(reader, "name"),
+            profileLink = _profileLink ?: missingField(reader, "profileLink"),
+            friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
           )
         }
 
@@ -298,7 +299,7 @@ public object TestQuery_ResponseAdapter {
                 }
 
                 return TestQuery.Data.Hero.OnCharacter.FriendsConnection.Edge.Node(
-                  name = _name!!
+                  name = _name ?: missingField(reader, "name")
                 )
               }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/responseBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/responseBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
index 0e19c55c0be..2d6b30ec33b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/responseBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_merge_fields/kotlin/responseBased/inline_fragment_merge_fields/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_merge_fields.TestQuery
@@ -71,10 +72,10 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!,
-          profileLink = _profileLink!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection"),
+          profileLink = _profileLink ?: missingField(reader, "profileLink")
         )
       }
 
@@ -167,7 +168,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.Hero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_simple/kotlin/responseBased/inline_fragment_simple/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_simple/kotlin/responseBased/inline_fragment_simple/adapter/TestQuery_ResponseAdapter.kt.expected
index 57aebe0a49f..3f0db6c79cc 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_simple/kotlin/responseBased/inline_fragment_simple/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_simple/kotlin/responseBased/inline_fragment_simple/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_simple.TestQuery
@@ -94,7 +95,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           height = _height
         )
       }
@@ -130,7 +131,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/operationBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/operationBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
index 3dc3a1b3c92..f250444c740 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/operationBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/operationBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -77,7 +78,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Foo(
           __typename = __typename,
-          foo = _foo!!,
+          foo = _foo ?: missingField(reader, "foo"),
           onBar = _onBar
         )
       }
@@ -114,7 +115,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Foo.OnBar(
-            bar = _bar!!
+            bar = _bar ?: missingField(reader, "bar")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/responseBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/responseBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
index 18595aa3376..9ae4cae0c3d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/responseBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_type_coercion/kotlin/responseBased/inline_fragment_type_coercion/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragment_type_coercion.TestQuery
@@ -94,9 +95,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.BarFoo(
-          __typename = __typename!!,
-          foo = _foo!!,
-          bar = _bar!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          foo = _foo ?: missingField(reader, "foo"),
+          bar = _bar ?: missingField(reader, "bar")
         )
       }
 
@@ -136,8 +137,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherFoo(
-          __typename = __typename!!,
-          foo = _foo!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          foo = _foo ?: missingField(reader, "foo")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_with_include_directive/kotlin/operationBased/inline_fragment_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_with_include_directive/kotlin/operationBased/inline_fragment_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
index 743ce5bd69f..82c6f35bc1b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_with_include_directive/kotlin/operationBased/inline_fragment_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragment_with_include_directive/kotlin/operationBased/inline_fragment_with_include_directive/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.and
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.not
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
@@ -95,7 +96,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          id = _id!!,
+          id = _id ?: missingField(reader, "id"),
           onHuman = _onHuman,
           onDroid = _onDroid,
           onCharacter = _onCharacter
@@ -146,7 +147,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OnHuman(
-            name = _name!!,
+            name = _name ?: missingField(reader, "name"),
             homePlanet = _homePlanet
           )
         }
@@ -181,7 +182,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OnDroid(
-            name = _name!!,
+            name = _name ?: missingField(reader, "name"),
             primaryFunction = _primaryFunction
           )
         }
@@ -214,7 +215,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OnCharacter(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/operationBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/operationBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
index 29e5d8faeb7..dfeec6b2c75 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/operationBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/operationBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -90,7 +91,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           onHuman = _onHuman,
           onDroid = _onDroid
         )
@@ -167,7 +168,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.Hero.OnHuman.Friend(
-              appearsIn = _appearsIn!!
+              appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
             )
           }
 
@@ -232,7 +233,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.Hero.OnDroid.Friend(
-              id = _id!!
+              id = _id ?: missingField(reader, "id")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/responseBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/responseBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
index d287ba02a44..4c4a9286638 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/responseBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/inline_fragments_with_friends/kotlin/responseBased/inline_fragments_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.inline_fragments_with_friends.TestQuery
@@ -105,8 +106,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height,
           friends = _friends
         )
@@ -145,7 +146,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.HumanHero.Friend(
-            appearsIn = _appearsIn!!
+            appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
           )
         }
 
@@ -186,8 +187,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction,
           friends = _friends
         )
@@ -226,7 +227,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.DroidHero.Friend(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
@@ -261,8 +262,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_type/kotlin/responseBased/input_object_type/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_type/kotlin/responseBased/input_object_type/adapter/TestQuery_ResponseAdapter.kt.expected
index b5d67d69a3a..9064f120f99 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_type/kotlin/responseBased/input_object_type/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_type/kotlin/responseBased/input_object_type/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.input_object_type.TestQuery
@@ -64,7 +65,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CreateReview(
-          stars = _stars!!,
+          stars = _stars ?: missingField(reader, "stars"),
           commentary = _commentary
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument/kotlin/responseBased/input_object_variable_and_argument/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument/kotlin/responseBased/input_object_variable_and_argument/adapter/TestQuery_ResponseAdapter.kt.expected
index 11896c034e7..453796bd938 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument/kotlin/responseBased/input_object_variable_and_argument/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument/kotlin/responseBased/input_object_variable_and_argument/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableDoubleAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.input_object_variable_and_argument.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HeroWithReview(
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument_with_generated_methods/kotlin/responseBased/input_object_variable_and_argument_with_generated_methods/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument_with_generated_methods/kotlin/responseBased/input_object_variable_and_argument_with_generated_methods/adapter/TestQuery_ResponseAdapter.kt.expected
index 492107170da..f28cf2e9052 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument_with_generated_methods/kotlin/responseBased/input_object_variable_and_argument_with_generated_methods/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/input_object_variable_and_argument_with_generated_methods/kotlin/responseBased/input_object_variable_and_argument_with_generated_methods/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableDoubleAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.input_object_variable_and_argument_with_generated_methods.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HeroWithReview(
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/interface_always_nested/kotlin/responseBased/interface_always_nested/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/interface_always_nested/kotlin/responseBased/interface_always_nested/adapter/TestQuery_ResponseAdapter.kt.expected
index e4ce88cf029..c58204b3d97 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/interface_always_nested/kotlin/responseBased/interface_always_nested/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/interface_always_nested/kotlin/responseBased/interface_always_nested/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.interface_always_nested.TestQuery
@@ -98,7 +99,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.ABRoot(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA1 = _fieldA1,
           fieldB1 = _fieldB1
         )
@@ -138,7 +139,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherRoot(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -172,7 +173,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherARoot(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA1 = _fieldA1
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/operationBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/operationBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
index 5e469be16ca..098b04bb316 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/operationBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/operationBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.interface_on_interface.GetHuman
@@ -38,8 +39,8 @@ public object GetHuman_ResponseAdapter {
       }
 
       return GetHuman.Data(
-        human = _human!!,
-        node = _node!!
+        human = _human ?: missingField(reader, "human"),
+        node = _node ?: missingField(reader, "node")
       )
     }
 
@@ -74,9 +75,9 @@ public object GetHuman_ResponseAdapter {
         }
 
         return GetHuman.Data.Human(
-          id = _id!!,
-          name = _name!!,
-          height = _height!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          height = _height ?: missingField(reader, "height")
         )
       }
 
@@ -156,7 +157,7 @@ public object GetHuman_ResponseAdapter {
           }
 
           return GetHuman.Data.Node.OnHuman(
-            height = _height!!
+            height = _height ?: missingField(reader, "height")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/responseBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/responseBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
index afba1874287..415e166010c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/responseBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/interface_on_interface/kotlin/responseBased/interface_on_interface/adapter/GetHuman_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.interface_on_interface.GetHuman
 import kotlin.Double
@@ -38,8 +39,8 @@ public object GetHuman_ResponseAdapter {
       }
 
       return GetHuman.Data(
-        human = _human!!,
-        node = _node!!
+        human = _human ?: missingField(reader, "human"),
+        node = _node ?: missingField(reader, "node")
       )
     }
 
@@ -74,9 +75,9 @@ public object GetHuman_ResponseAdapter {
         }
 
         return GetHuman.Data.Human(
-          id = _id!!,
-          name = _name!!,
-          height = _height!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          height = _height ?: missingField(reader, "height")
         )
       }
 
@@ -140,8 +141,8 @@ public object GetHuman_ResponseAdapter {
         }
 
         return GetHuman.Data.HumanNode(
-          __typename = __typename!!,
-          height = _height!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          height = _height ?: missingField(reader, "height")
         )
       }
 
@@ -176,7 +177,7 @@ public object GetHuman_ResponseAdapter {
         }
 
         return GetHuman.Data.OtherNode(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/introspection_query/kotlin/responseBased/introspection_query/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/introspection_query/kotlin/responseBased/introspection_query/adapter/TestQuery_ResponseAdapter.kt.expected
index 26ce19d290b..300ba5ec090 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/introspection_query/kotlin/responseBased/introspection_query/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/introspection_query/kotlin/responseBased/introspection_query/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.introspection_query.TestQuery
 import com.example.introspection_query.type.__TypeKind
@@ -37,8 +38,8 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        __schema = ___schema!!,
-        __type = ___type!!
+        __schema = ___schema ?: missingField(reader, "__schema"),
+        __type = ___type ?: missingField(reader, "__type")
       )
     }
 
@@ -71,8 +72,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.__Schema(
-          queryType = _queryType!!,
-          types = _types!!
+          queryType = _queryType ?: missingField(reader, "queryType"),
+          types = _types ?: missingField(reader, "types")
         )
       }
 
@@ -165,7 +166,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.__Type(
           name = _name,
-          kind = _kind!!
+          kind = _kind ?: missingField(reader, "kind")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java8annotation/kotlin/responseBased/java8annotation/adapter/LoginBarber_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java8annotation/kotlin/responseBased/java8annotation/adapter/LoginBarber_ResponseAdapter.kt.expected
index 904ea726692..71e9ac91911 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java8annotation/kotlin/responseBased/java8annotation/adapter/LoginBarber_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java8annotation/kotlin/responseBased/java8annotation/adapter/LoginBarber_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.java8annotation.LoginBarber
 import kotlin.String
@@ -32,7 +33,7 @@ public object LoginBarber_ResponseAdapter {
       }
 
       return LoginBarber.Data(
-        login = _login!!
+        login = _login ?: missingField(reader, "login")
       )
     }
 
@@ -60,7 +61,7 @@ public object LoginBarber_ResponseAdapter {
         }
 
         return LoginBarber.Data.Login(
-          response = _response!!
+          response = _response ?: missingField(reader, "response")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_android_annotations/kotlin/responseBased/java_android_annotations/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_android_annotations/kotlin/responseBased/java_android_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
index 6ba60e3478e..d3f08dc78d4 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_android_annotations/kotlin/responseBased/java_android_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_android_annotations/kotlin/responseBased/java_android_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_android_annotations.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_apollo_optionals/kotlin/responseBased/java_apollo_optionals/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_apollo_optionals/kotlin/responseBased/java_apollo_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
index 65f78249fbb..fdad6dca26f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_apollo_optionals/kotlin/responseBased/java_apollo_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_apollo_optionals/kotlin/responseBased/java_apollo_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_apollo_optionals.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_guava_optionals/kotlin/responseBased/java_guava_optionals/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_guava_optionals/kotlin/responseBased/java_guava_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
index 1e4eb974722..a268487b920 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_guava_optionals/kotlin/responseBased/java_guava_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_guava_optionals/kotlin/responseBased/java_guava_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_guava_optionals.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_java_optionals/kotlin/responseBased/java_java_optionals/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_java_optionals/kotlin/responseBased/java_java_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
index 715b1f262c2..eaf129324d2 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_java_optionals/kotlin/responseBased/java_java_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_java_optionals/kotlin/responseBased/java_java_optionals/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_java_optionals.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_jetbrains_annotations/kotlin/responseBased/java_jetbrains_annotations/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_jetbrains_annotations/kotlin/responseBased/java_jetbrains_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
index 44eb5045f41..417f8bd3214 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_jetbrains_annotations/kotlin/responseBased/java_jetbrains_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_jetbrains_annotations/kotlin/responseBased/java_jetbrains_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_jetbrains_annotations.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_jsr305_annotations/kotlin/responseBased/java_jsr305_annotations/adapter/MyQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_jsr305_annotations/kotlin/responseBased/java_jsr305_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
index 71fb7dbcd6e..22e71ee6e4a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_jsr305_annotations/kotlin/responseBased/java_jsr305_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_jsr305_annotations/kotlin/responseBased/java_jsr305_annotations/adapter/MyQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_jsr305_annotations.MyQuery
@@ -51,9 +52,9 @@ public object MyQuery_ResponseAdapter {
 
       return MyQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!,
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType"),
         nullableListOfNullableString = _nullableListOfNullableString,
         nullableListOfNonNullableString = _nullableListOfNonNullableString
       )
@@ -103,7 +104,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -138,7 +139,7 @@ public object MyQuery_ResponseAdapter {
 
         return MyQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/java_primitive_types/kotlin/responseBased/java_primitive_types/adapter/JavaPrimitiveQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/java_primitive_types/kotlin/responseBased/java_primitive_types/adapter/JavaPrimitiveQuery_ResponseAdapter.kt.expected
index ddf38e4eb5b..688cb308bff 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/java_primitive_types/kotlin/responseBased/java_primitive_types/adapter/JavaPrimitiveQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/java_primitive_types/kotlin/responseBased/java_primitive_types/adapter/JavaPrimitiveQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.NullableIntAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.java_primitive_types.JavaPrimitiveQuery
@@ -43,9 +44,9 @@ public object JavaPrimitiveQuery_ResponseAdapter {
 
       return JavaPrimitiveQuery.Data(
         nullableInt = _nullableInt,
-        nonNullableInt = _nonNullableInt!!,
+        nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt"),
         nullableMyType = _nullableMyType,
-        nonNullableMyType = _nonNullableMyType!!
+        nonNullableMyType = _nonNullableMyType ?: missingField(reader, "nonNullableMyType")
       )
     }
 
@@ -85,7 +86,7 @@ public object JavaPrimitiveQuery_ResponseAdapter {
 
         return JavaPrimitiveQuery.Data.NullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
@@ -120,7 +121,7 @@ public object JavaPrimitiveQuery_ResponseAdapter {
 
         return JavaPrimitiveQuery.Data.NonNullableMyType(
           nullableInt = _nullableInt,
-          nonNullableInt = _nonNullableInt!!
+          nonNullableInt = _nonNullableInt ?: missingField(reader, "nonNullableInt")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/measurements b/libraries/apollo-compiler/src/test/graphql/com/example/measurements
index 18bbaa622a2..e6e4e6d8145 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/measurements
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/measurements
@@ -2,243 +2,243 @@
 // If you updated the codegen and test fixtures, you should commit this file too.
 
 Test:                                                                                      Total LOC:
-aggregate-all                                                                                  194857
-aggregate-kotlin-responseBased                                                                  61996
-aggregate-kotlin-operationBased                                                                 40603
+aggregate-all                                                                                  195062
+aggregate-kotlin-responseBased                                                                  62116
+aggregate-kotlin-operationBased                                                                 40688
 aggregate-kotlin-compat                                                                             0
 aggregate-java-operationBased                                                                   92258
 
 java-operationBased-fragments_with_defer_and_include_directives                                  5552
-kotlin-operationBased-fragments_with_defer_and_include_directives                                3459
+kotlin-operationBased-fragments_with_defer_and_include_directives                                3467
 java-operationBased-data_builders                                                                2933
-kotlin-responseBased-fragment_with_inline_fragment                                               2404
+kotlin-responseBased-fragment_with_inline_fragment                                               2408
 java-operationBased-mutation_create_review                                                       2379
-kotlin-responseBased-data_builders                                                               2271
+kotlin-responseBased-data_builders                                                               2278
 java-operationBased-fragment_with_inline_fragment                                                2227
-kotlin-operationBased-data_builders                                                              1922
+kotlin-operationBased-data_builders                                                              1929
 java-operationBased-nested_named_fragments                                                       1868
 java-operationBased-union_inline_fragments                                                       1633
 java-operationBased-fragment_spread_with_include_directive                                       1625
 java-operationBased-unique_type_name                                                             1623
-kotlin-responseBased-nested_named_fragments                                                      1601
+kotlin-responseBased-nested_named_fragments                                                      1604
 java-operationBased-inline_fragment_intersection                                                 1599
 java-operationBased-input_object_type                                                            1596
 java-operationBased-mutation_create_review_semantic_naming                                       1579
 java-operationBased-root_query_fragment_with_nested_fragments                                    1565
 java-operationBased-named_fragment_delegate                                                      1466
 java-operationBased-simple_fragment                                                              1465
-kotlin-responseBased-mutation_create_review                                                      1386
+kotlin-responseBased-mutation_create_review                                                      1387
 java-operationBased-named_fragment_with_variables                                                1367
-kotlin-responseBased-named_fragment_delegate                                                     1346
-kotlin-responseBased-unique_type_name                                                            1327
+kotlin-responseBased-named_fragment_delegate                                                     1349
+kotlin-responseBased-unique_type_name                                                            1329
 java-operationBased-nested_conditional_inline                                                    1297
 java-operationBased-fragment_used_twice                                                          1278
-kotlin-operationBased-fragment_with_inline_fragment                                              1268
+kotlin-operationBased-fragment_with_inline_fragment                                              1272
 java-operationBased-multiple_fragments                                                           1265
 java-operationBased-nested_field_with_multiple_fieldsets                                         1255
-kotlin-responseBased-root_query_fragment_with_nested_fragments                                   1251
-kotlin-responseBased-input_object_type                                                           1238
-kotlin-operationBased-nested_named_fragments                                                     1231
+kotlin-responseBased-root_query_fragment_with_nested_fragments                                   1255
+kotlin-responseBased-input_object_type                                                           1239
+kotlin-operationBased-nested_named_fragments                                                     1234
 java-operationBased-two_heroes_with_friends                                                      1212
+kotlin-responseBased-inline_fragment_intersection                                                1209
 java-operationBased-inline_fragment_merge_fields                                                 1209
-kotlin-responseBased-inline_fragment_intersection                                                1208
+kotlin-responseBased-simple_fragment                                                             1164
 java-operationBased-named_fragment_inside_inline_fragment                                        1162
-kotlin-responseBased-simple_fragment                                                             1161
 java-operationBased-fragments_with_type_condition                                                1157
-kotlin-responseBased-fragment_used_twice                                                         1134
+kotlin-responseBased-fragment_used_twice                                                         1138
 java-operationBased-target_name                                                                  1134
-kotlin-operationBased-inline_fragment_intersection                                               1121
-kotlin-operationBased-union_inline_fragments                                                     1118
-kotlin-responseBased-union_inline_fragments                                                      1112
+kotlin-operationBased-inline_fragment_intersection                                               1122
+kotlin-operationBased-union_inline_fragments                                                     1119
+kotlin-responseBased-union_inline_fragments                                                      1113
 java-operationBased-root_query_inline_fragment                                                   1096
+kotlin-operationBased-fragment_spread_with_include_directive                                     1091
 java-operationBased-java_jetbrains_annotations                                                   1091
-kotlin-operationBased-fragment_spread_with_include_directive                                     1088
+kotlin-operationBased-unique_type_name                                                           1089
 java-operationBased-java_android_annotations                                                     1088
 java-operationBased-java_jsr305_annotations                                                      1088
-kotlin-operationBased-unique_type_name                                                           1087
-kotlin-responseBased-fragments_with_type_condition                                               1080
+kotlin-responseBased-fragments_with_type_condition                                               1083
 java-operationBased-java_guava_optionals                                                         1072
 java-operationBased-java_java_optionals                                                          1072
 java-operationBased-java_apollo_optionals                                                        1071
-kotlin-responseBased-multiple_fragments                                                          1054
+kotlin-responseBased-multiple_fragments                                                          1056
 java-operationBased-simple_fragment_with_inline_fragments                                        1046
 java-operationBased-inline_fragments_with_friends                                                1038
-kotlin-operationBased-root_query_fragment_with_nested_fragments                                  1033
+kotlin-operationBased-root_query_fragment_with_nested_fragments                                  1037
+kotlin-responseBased-simple_fragment_with_inline_fragments                                       1031
 java-operationBased-fragment_spread_with_nested_fields                                           1030
-kotlin-responseBased-simple_fragment_with_inline_fragments                                       1029
-kotlin-responseBased-nested_conditional_inline                                                   1028
+kotlin-responseBased-nested_conditional_inline                                                   1029
 java-operationBased-operationbased2_ex8                                                          1026
-kotlin-responseBased-named_fragment_with_variables                                               1020
+kotlin-responseBased-named_fragment_with_variables                                               1023
 java-operationBased-java_primitive_types                                                         1015
-kotlin-operationBased-simple_fragment                                                            1011
-kotlin-operationBased-named_fragment_delegate                                                     991
+kotlin-operationBased-simple_fragment                                                            1012
+kotlin-operationBased-named_fragment_delegate                                                     993
 java-operationBased-decapitalized_fields                                                          975
 java-operationBased-fragments_same_type_condition                                                 951
 java-operationBased-simple_union                                                                  949
-kotlin-responseBased-operationbased2_ex8                                                          943
+kotlin-responseBased-operationbased2_ex8                                                          945
 java-operationBased-deprecated_merged_field                                                       929
 java-operationBased-hero_details                                                                  919
 java-operationBased-not_all_combinations_are_needed                                               919
 java-operationBased-fieldset_with_multiple_super                                                  901
 java-operationBased-simple_inline_fragment                                                        901
 java-operationBased-inline_fragment_with_include_directive                                        898
-kotlin-operationBased-nested_conditional_inline                                                   896
+kotlin-operationBased-nested_conditional_inline                                                   897
 java-operationBased-introspection_query                                                           890
-kotlin-responseBased-mutation_create_review_semantic_naming                                       880
-kotlin-operationBased-fragment_used_twice                                                         874
-kotlin-operationBased-named_fragment_with_variables                                               872
+kotlin-responseBased-mutation_create_review_semantic_naming                                       881
+kotlin-operationBased-fragment_used_twice                                                         877
+kotlin-operationBased-named_fragment_with_variables                                               875
 java-operationBased-test_inline                                                                   865
 java-operationBased-union_fragment                                                                863
-kotlin-responseBased-fragment_spread_with_nested_fields                                           857
+kotlin-responseBased-fragment_spread_with_nested_fields                                           859
 java-operationBased-inline_fragment_inside_inline_fragment                                        854
-kotlin-operationBased-multiple_fragments                                                          834
-kotlin-responseBased-nested_field_with_multiple_fieldsets                                         830
+kotlin-operationBased-multiple_fragments                                                          835
+kotlin-responseBased-nested_field_with_multiple_fieldsets                                         831
 java-operationBased-named_fragment_without_implementation                                         822
-kotlin-operationBased-fragments_with_type_condition                                               812
+kotlin-operationBased-fragments_with_type_condition                                               814
 kotlin-operationBased-nested_field_with_multiple_fieldsets                                        803
+kotlin-operationBased-named_fragment_inside_inline_fragment                                       790
 java-operationBased-fragment_with_multiple_fieldsets                                              787
-kotlin-operationBased-named_fragment_inside_inline_fragment                                       787
 java-operationBased-hero_details_semantic_naming                                                  783
+kotlin-operationBased-inline_fragment_merge_fields                                                782
 java-operationBased-operationbased2_ex7                                                           782
-kotlin-operationBased-inline_fragment_merge_fields                                                781
-kotlin-responseBased-two_heroes_with_friends                                                      780
-kotlin-responseBased-target_name                                                                  776
+kotlin-responseBased-two_heroes_with_friends                                                      781
+kotlin-responseBased-target_name                                                                  777
 java-operationBased-suppressed_warnings                                                           775
-kotlin-responseBased-inline_fragments_with_friends                                                770
-kotlin-responseBased-deprecated_merged_field                                                      767
-kotlin-responseBased-named_fragment_inside_inline_fragment                                        767
-kotlin-operationBased-root_query_inline_fragment                                                  767
+kotlin-responseBased-inline_fragments_with_friends                                                771
+kotlin-responseBased-named_fragment_inside_inline_fragment                                        770
+kotlin-responseBased-deprecated_merged_field                                                      769
+kotlin-operationBased-root_query_inline_fragment                                                  768
 java-operationBased-path_vs_flat_accessors                                                        762
-kotlin-responseBased-simple_union                                                                 749
+kotlin-responseBased-simple_union                                                                 752
 kotlin-operationBased-target_name                                                                 749
-kotlin-responseBased-root_query_inline_fragment                                                   743
+kotlin-responseBased-root_query_inline_fragment                                                   744
 java-operationBased-reserved_keywords                                                             741
 java-operationBased-typename_always_first                                                         738
-kotlin-responseBased-fragments_same_type_condition                                                721
-kotlin-operationBased-inline_fragments_with_friends                                               719
+kotlin-responseBased-fragments_same_type_condition                                                723
+kotlin-operationBased-inline_fragments_with_friends                                               720
 java-operationBased-interface_on_interface                                                        714
 java-operationBased-root_query_fragment                                                           701
-kotlin-operationBased-simple_fragment_with_inline_fragments                                       699
+kotlin-operationBased-simple_fragment_with_inline_fragments                                       701
 java-operationBased-input_object_variable_and_argument                                            698
 java-operationBased-input_object_variable_and_argument_with_generated_methods                     698
-kotlin-operationBased-fragment_spread_with_nested_fields                                          686
+kotlin-operationBased-fragment_spread_with_nested_fields                                          688
+kotlin-operationBased-operationbased2_ex8                                                         672
 java-operationBased-monomorphic                                                                   671
-kotlin-operationBased-operationbased2_ex8                                                         670
 java-operationBased-interface_always_nested                                                       669
-kotlin-operationBased-fragments_same_type_condition                                               651
+kotlin-operationBased-fragments_same_type_condition                                               652
 java-operationBased-capitalized_fields                                                            650
-kotlin-operationBased-simple_union                                                                648
+kotlin-operationBased-simple_union                                                                650
+kotlin-responseBased-fragment_with_multiple_fieldsets                                             647
 java-operationBased-recursive_selection                                                           647
-kotlin-responseBased-fragment_with_multiple_fieldsets                                             645
-kotlin-responseBased-union_fragment                                                               645
-kotlin-responseBased-test_inline                                                                  642
+kotlin-responseBased-union_fragment                                                               647
+kotlin-responseBased-test_inline                                                                  643
 java-operationBased-hero_with_review                                                              640
 java-operationBased-deprecation                                                                   637
-kotlin-operationBased-decapitalized_fields                                                        634
-kotlin-responseBased-named_fragment_without_implementation                                        633
-kotlin-operationBased-deprecated_merged_field                                                     628
-kotlin-responseBased-hero_details                                                                 628
-kotlin-responseBased-input_object_variable_and_argument_with_generated_methods                    625
-kotlin-operationBased-not_all_combinations_are_needed                                             623
+kotlin-operationBased-decapitalized_fields                                                        635
+kotlin-responseBased-named_fragment_without_implementation                                        634
+kotlin-operationBased-deprecated_merged_field                                                     630
+kotlin-responseBased-hero_details                                                                 629
+kotlin-responseBased-input_object_variable_and_argument_with_generated_methods                    626
+kotlin-operationBased-not_all_combinations_are_needed                                             624
 java-operationBased-field_with_include_directive                                                  621
 java-operationBased-hero_name_query_long_name                                                     621
-kotlin-operationBased-union_fragment                                                              617
-kotlin-operationBased-inline_fragment_inside_inline_fragment                                      616
+kotlin-operationBased-union_fragment                                                              619
+kotlin-operationBased-inline_fragment_inside_inline_fragment                                      617
 java-operationBased-custom_scalar_type                                                            615
 java-operationBased-variable_default_value                                                        613
-kotlin-responseBased-inline_fragment_inside_inline_fragment                                       611
-kotlin-responseBased-inline_fragment_merge_fields                                                 611
-kotlin-operationBased-inline_fragment_with_include_directive                                      611
+kotlin-responseBased-inline_fragment_inside_inline_fragment                                       612
+kotlin-responseBased-inline_fragment_merge_fields                                                 612
+kotlin-operationBased-inline_fragment_with_include_directive                                      612
 java-operationBased-hero_name                                                                     610
 kotlin-operationBased-fieldset_with_multiple_super                                                609
-kotlin-operationBased-simple_inline_fragment                                                      602
-kotlin-responseBased-operationbased2_ex7                                                          601
-kotlin-operationBased-named_fragment_without_implementation                                       600
-kotlin-responseBased-not_all_combinations_are_needed                                              597
-kotlin-responseBased-decapitalized_fields                                                         595
-kotlin-responseBased-fieldset_with_multiple_super                                                 595
+kotlin-operationBased-simple_inline_fragment                                                      603
+kotlin-responseBased-operationbased2_ex7                                                          602
+kotlin-operationBased-named_fragment_without_implementation                                       601
+kotlin-responseBased-not_all_combinations_are_needed                                              598
+kotlin-responseBased-decapitalized_fields                                                         596
+kotlin-responseBased-fieldset_with_multiple_super                                                 596
+kotlin-responseBased-simple_inline_fragment                                                       596
 java-operationBased-java8annotation                                                               595
-kotlin-responseBased-simple_inline_fragment                                                       595
-kotlin-responseBased-java_android_annotations                                                     593
-kotlin-responseBased-java_apollo_optionals                                                        593
-kotlin-responseBased-java_guava_optionals                                                         593
-kotlin-responseBased-java_java_optionals                                                          593
-kotlin-responseBased-java_jetbrains_annotations                                                   593
-kotlin-responseBased-java_jsr305_annotations                                                      593
+kotlin-responseBased-java_android_annotations                                                     594
+kotlin-responseBased-java_apollo_optionals                                                        594
+kotlin-responseBased-java_guava_optionals                                                         594
+kotlin-responseBased-java_java_optionals                                                          594
+kotlin-responseBased-java_jetbrains_annotations                                                   594
+kotlin-responseBased-java_jsr305_annotations                                                      594
+kotlin-responseBased-introspection_query                                                          592
 java-operationBased-optional                                                                      592
-kotlin-responseBased-introspection_query                                                          591
 java-operationBased-enum_field                                                                    581
 java-operationBased-inline_fragment_for_non_optional_field                                        579
 java-operationBased-inline_fragment_type_coercion                                                 573
-kotlin-responseBased-reserved_keywords                                                            569
-kotlin-operationBased-test_inline                                                                 569
+kotlin-responseBased-reserved_keywords                                                            570
+kotlin-operationBased-test_inline                                                                 570
 java-operationBased-two_heroes_unique                                                             568
 java-operationBased-list_field_clash                                                              561
+kotlin-responseBased-java_primitive_types                                                         558
 java-operationBased-inline_fragment_simple                                                        557
-kotlin-responseBased-java_primitive_types                                                         557
-kotlin-responseBased-path_vs_flat_accessors                                                       546
-kotlin-operationBased-reserved_keywords                                                           542
-kotlin-responseBased-input_object_variable_and_argument                                           536
-kotlin-responseBased-hero_details_semantic_naming                                                 532
-kotlin-operationBased-fragment_with_multiple_fieldsets                                            531
-kotlin-responseBased-root_query_fragment                                                          528
-kotlin-responseBased-typename_always_first                                                        525
-kotlin-operationBased-operationbased2_ex7                                                         522
+kotlin-responseBased-path_vs_flat_accessors                                                       547
+kotlin-operationBased-reserved_keywords                                                           543
+kotlin-responseBased-input_object_variable_and_argument                                           537
+kotlin-responseBased-hero_details_semantic_naming                                                 533
+kotlin-operationBased-fragment_with_multiple_fieldsets                                            532
+kotlin-responseBased-root_query_fragment                                                          530
+kotlin-responseBased-typename_always_first                                                        526
+kotlin-operationBased-operationbased2_ex7                                                         523
+kotlin-responseBased-interface_on_interface                                                       522
 java-operationBased-starships                                                                     522
-kotlin-responseBased-interface_on_interface                                                       521
-kotlin-responseBased-suppressed_warnings                                                          517
+kotlin-responseBased-suppressed_warnings                                                          518
 kotlin-operationBased-path_vs_flat_accessors                                                      516
-kotlin-operationBased-typename_always_first                                                       514
+kotlin-operationBased-typename_always_first                                                       515
 java-operationBased-antlr_tokens                                                                  509
 java-operationBased-subscriptions                                                                 505
-kotlin-responseBased-hero_with_review                                                             501
-kotlin-responseBased-hero_name                                                                    498
-kotlin-operationBased-interface_on_interface                                                      495
-kotlin-responseBased-hero_name_query_long_name                                                    492
-kotlin-responseBased-interface_always_nested                                                      490
+kotlin-responseBased-hero_with_review                                                             502
+kotlin-responseBased-hero_name                                                                    499
+kotlin-operationBased-interface_on_interface                                                      496
+kotlin-responseBased-hero_name_query_long_name                                                    493
+kotlin-responseBased-interface_always_nested                                                      491
 java-operationBased-arguments_hardcoded                                                           484
-kotlin-operationBased-root_query_fragment                                                         479
-kotlin-responseBased-custom_scalar_type                                                           477
+kotlin-operationBased-root_query_fragment                                                         481
+kotlin-responseBased-custom_scalar_type                                                           478
 kotlin-operationBased-interface_always_nested                                                     463
 java-operationBased-merged_include                                                                462
 java-operationBased-operation_id_generator                                                        462
-kotlin-responseBased-variable_default_value                                                       461
-kotlin-responseBased-deprecation                                                                  459
-kotlin-operationBased-monomorphic                                                                 459
+kotlin-responseBased-variable_default_value                                                       462
+kotlin-responseBased-deprecation                                                                  460
+kotlin-operationBased-monomorphic                                                                 460
+kotlin-responseBased-monomorphic                                                                  459
 kotlin-responseBased-enum_field                                                                   458
-kotlin-responseBased-monomorphic                                                                  458
-kotlin-responseBased-inline_fragment_for_non_optional_field                                       455
+kotlin-responseBased-inline_fragment_for_non_optional_field                                       456
 java-operationBased-enums_as_sealed                                                               453
 java-operationBased-case_sensitive_enum                                                           450
-kotlin-responseBased-optional                                                                     446
+kotlin-responseBased-optional                                                                     447
 java-operationBased-nonnull                                                                       443
-kotlin-operationBased-hero_name                                                                   441
-kotlin-operationBased-capitalized_fields                                                          440
-kotlin-responseBased-inline_fragment_type_coercion                                                436
+kotlin-operationBased-hero_name                                                                   442
+kotlin-operationBased-capitalized_fields                                                          441
+kotlin-responseBased-inline_fragment_type_coercion                                                437
 java-operationBased-companion                                                                     435
 kotlin-responseBased-field_with_include_directive                                                 435
 java-operationBased-object                                                                        430
-kotlin-responseBased-recursive_selection                                                          427
-kotlin-responseBased-inline_fragment_simple                                                       419
-kotlin-operationBased-inline_fragment_for_non_optional_field                                      412
+kotlin-responseBased-recursive_selection                                                          428
+kotlin-responseBased-inline_fragment_simple                                                       420
+kotlin-operationBased-inline_fragment_for_non_optional_field                                      413
 kotlin-responseBased-list_field_clash                                                             405
-kotlin-responseBased-capitalized_fields                                                           402
-kotlin-operationBased-inline_fragment_type_coercion                                               401
-kotlin-responseBased-two_heroes_unique                                                            397
+kotlin-responseBased-capitalized_fields                                                           403
+kotlin-operationBased-inline_fragment_type_coercion                                               402
+kotlin-responseBased-two_heroes_unique                                                            398
 kotlin-operationBased-inline_fragment_simple                                                      393
-kotlin-responseBased-starships                                                                    382
+kotlin-responseBased-starships                                                                    383
+kotlin-responseBased-java8annotation                                                              382
 kotlin-responseBased-antlr_tokens                                                                 381
-kotlin-responseBased-java8annotation                                                              381
-kotlin-responseBased-arguments_hardcoded                                                          369
-kotlin-responseBased-subscriptions                                                                369
+kotlin-responseBased-arguments_hardcoded                                                          370
+kotlin-responseBased-subscriptions                                                                370
 kotlin-responseBased-enums_as_sealed                                                              352
 kotlin-responseBased-case_sensitive_enum                                                          333
-kotlin-responseBased-operation_id_generator                                                       332
+kotlin-responseBased-operation_id_generator                                                       333
 java-operationBased-java_hashcode                                                                 331
-kotlin-responseBased-merged_include                                                               330
-kotlin-responseBased-big_query                                                                    324
-kotlin-responseBased-nonnull                                                                      316
-kotlin-operationBased-companion                                                                   309
+kotlin-responseBased-merged_include                                                               331
+kotlin-responseBased-big_query                                                                    325
+kotlin-responseBased-nonnull                                                                      317
+kotlin-operationBased-companion                                                                   310
 kotlin-responseBased-object                                                                       308
 kotlin-responseBased-java_hashcode                                                                248
 kotlin-responseBased-__schema                                                                     128
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/merged_include/kotlin/responseBased/merged_include/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/merged_include/kotlin/responseBased/merged_include/adapter/TestQuery_ResponseAdapter.kt.expected
index dd7bc22089e..b59a6bdcd9c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/merged_include/kotlin/responseBased/merged_include/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/merged_include/kotlin/responseBased/merged_include/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.merged_include.TestQuery
@@ -63,8 +64,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!,
-          id = _id!!
+          name = _name ?: missingField(reader, "name"),
+          id = _id ?: missingField(reader, "id")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/operationBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/operationBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
index 2501b44fe1d..5815046da27 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/operationBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/operationBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.monomorphic.TestQuery
 import kotlin.String
@@ -32,7 +33,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        cat = _cat!!
+        cat = _cat ?: missingField(reader, "cat")
       )
     }
 
@@ -64,7 +65,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Cat(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           onNode = _onNode
         )
       }
@@ -100,7 +101,7 @@ public object TestQuery_ResponseAdapter {
               adapterContext)
 
           return TestQuery.Data.Cat.OnNode(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             onAnimal = _onAnimal
           )
         }
@@ -132,7 +133,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.Cat.OnNode.OnAnimal(
-              species = _species!!
+              species = _species ?: missingField(reader, "species")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/responseBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/responseBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
index 83380f7079c..5cdcdf5ae8d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/responseBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/monomorphic/kotlin/responseBased/monomorphic/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.monomorphic.TestQuery
 import kotlin.String
@@ -34,7 +35,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        cat = _cat!!
+        cat = _cat ?: missingField(reader, "cat")
       )
     }
 
@@ -91,8 +92,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.AnimalNodeCat(
-          __typename = __typename!!,
-          species = _species!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species")
         )
       }
 
@@ -127,7 +128,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherCat(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/operationBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/operationBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index d5a8afc52c0..a0d77b7e2d8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/operationBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/operationBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.multiple_fragments.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.A(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           aFragment = _aFragment
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index 697caecfad9..9464206ee5d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.multiple_fragments.TestQuery
@@ -66,7 +67,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.A(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           node = _node
         )
       }
@@ -129,7 +130,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.A.ANodeNode(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             field1 = _field1,
             field2 = _field2
           )
@@ -169,7 +170,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.A.OtherNode(
-            __typename = __typename!!
+            __typename = __typename ?: missingField(reader, "__typename")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/fragment/AFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/fragment/AFragmentImpl_ResponseAdapter.kt.expected
index 013d000447c..13983af6aff 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/fragment/AFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/multiple_fragments/kotlin/responseBased/multiple_fragments/fragment/AFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -94,7 +95,7 @@ public object AFragmentImpl_ResponseAdapter {
         }
 
         return AFragmentImpl.Data.ANodeNode(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           field1 = _field1,
           field2 = _field2
         )
@@ -134,7 +135,7 @@ public object AFragmentImpl_ResponseAdapter {
         }
 
         return AFragmentImpl.Data.OtherNode(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review/kotlin/responseBased/mutation_create_review/adapter/CreateReviewForEpisode_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review/kotlin/responseBased/mutation_create_review/adapter/CreateReviewForEpisode_ResponseAdapter.kt.expected
index a45ce2d9262..1e0bfb32620 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review/kotlin/responseBased/mutation_create_review/adapter/CreateReviewForEpisode_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review/kotlin/responseBased/mutation_create_review/adapter/CreateReviewForEpisode_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.mutation_create_review.CreateReviewForEpisode
@@ -78,7 +79,7 @@ internal object CreateReviewForEpisode_ResponseAdapter {
         }
 
         return CreateReviewForEpisode.Data.CreateReview(
-          stars = _stars!!,
+          stars = _stars ?: missingField(reader, "stars"),
           commentary = _commentary,
           listOfListOfString = _listOfListOfString,
           listOfListOfEnum = _listOfListOfEnum,
@@ -132,7 +133,7 @@ internal object CreateReviewForEpisode_ResponseAdapter {
           }
 
           return CreateReviewForEpisode.Data.CreateReview.ListOfListOfObject(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review_semantic_naming/kotlin/responseBased/mutation_create_review_semantic_naming/adapter/CreateReviewForEpisodeMutation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review_semantic_naming/kotlin/responseBased/mutation_create_review_semantic_naming/adapter/CreateReviewForEpisodeMutation_ResponseAdapter.kt.expected
index 6ceeef855fe..468163b9545 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review_semantic_naming/kotlin/responseBased/mutation_create_review_semantic_naming/adapter/CreateReviewForEpisodeMutation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/mutation_create_review_semantic_naming/kotlin/responseBased/mutation_create_review_semantic_naming/adapter/CreateReviewForEpisodeMutation_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.mutation_create_review_semantic_naming.CreateReviewForEpisodeMutation
@@ -66,7 +67,7 @@ public object CreateReviewForEpisodeMutation_ResponseAdapter {
         }
 
         return CreateReviewForEpisodeMutation.Data.CreateReview(
-          stars = _stars!!,
+          stars = _stars ?: missingField(reader, "stars"),
           commentary = _commentary
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index f259956b452..6a8800868e7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -39,7 +40,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return com.example.named_fragment_delegate.fragment.DroidDetails(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction,
         friends = _friends
       )
@@ -76,7 +77,7 @@ public object DroidDetailsImpl_ResponseAdapter {
         }
 
         return com.example.named_fragment_delegate.fragment.DroidDetails.Friend(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 8f3d46a88a4..545ee9f72fd 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/operationBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Any
@@ -40,9 +41,9 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return com.example.named_fragment_delegate.fragment.HumanDetails(
-        name = _name!!,
-        profileLink = _profileLink!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        profileLink = _profileLink ?: missingField(reader, "profileLink"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -138,7 +139,7 @@ public object HumanDetailsImpl_ResponseAdapter {
             }
 
             return com.example.named_fragment_delegate.fragment.HumanDetails.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/adapter/TestQuery_ResponseAdapter.kt.expected
index 472c85263a5..0a3412852f9 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.named_fragment_delegate.TestQuery
@@ -104,8 +105,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction,
           friends = _friends
         )
@@ -144,7 +145,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.DroidHero.Friend(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -184,10 +185,10 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
-          profileLink = _profileLink!!,
-          friendsConnection = _friendsConnection!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          profileLink = _profileLink ?: missingField(reader, "profileLink"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -282,7 +283,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.HumanHero.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -317,7 +318,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
index e8acb4072c4..49a3e0b0d1f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/DroidDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -38,7 +39,7 @@ public object DroidDetailsImpl_ResponseAdapter {
       }
 
       return DroidDetailsImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction,
         friends = _friends
       )
@@ -74,7 +75,7 @@ public object DroidDetailsImpl_ResponseAdapter {
         }
 
         return DroidDetailsImpl.Data.Friend(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index 91d408812de..7ab614ed413 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_delegate/kotlin/responseBased/named_fragment_delegate/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Any
@@ -39,9 +40,9 @@ public object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.Data(
-        name = _name!!,
-        profileLink = _profileLink!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        profileLink = _profileLink ?: missingField(reader, "profileLink"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -131,7 +132,7 @@ public object HumanDetailsImpl_ResponseAdapter {
             }
 
             return HumanDetailsImpl.Data.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
index 2e4929463c2..e7ce8f8608c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.named_fragment_inside_inline_fragment.GetHero
@@ -65,7 +66,7 @@ public object GetHero_ResponseAdapter {
             adapterContext)
 
         return GetHero.Data.Hero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           onCharacter = _onCharacter
         )
       }
@@ -105,7 +106,7 @@ public object GetHero_ResponseAdapter {
               adapterContext)
 
           return GetHero.Data.Hero.OnCharacter(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             characterName = _characterName,
             characterAppearsIn = _characterAppearsIn
           )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
index 13ae3fe7b70..a0d99d4c783 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.example.named_fragment_inside_inline_fragment.type.Episode
 import com.example.named_fragment_inside_inline_fragment.type.adapter.Episode_ResponseAdapter
@@ -35,7 +36,7 @@ public object CharacterAppearsInImpl_ResponseAdapter {
       }
 
       return com.example.named_fragment_inside_inline_fragment.fragment.CharacterAppearsIn(
-        appearsIn = _appearsIn!!
+        appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
index 1dded4f9ba6..31666b4789e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/operationBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -31,7 +32,7 @@ public object CharacterNameImpl_ResponseAdapter {
       }
 
       return com.example.named_fragment_inside_inline_fragment.fragment.CharacterName(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
index ab18876fd2f..77d910e51a3 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/adapter/GetHero_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.named_fragment_inside_inline_fragment.GetHero
@@ -68,9 +69,9 @@ public object GetHero_ResponseAdapter {
         }
 
         return GetHero.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
-          appearsIn = _appearsIn!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
index cd4cec31e3c..5d07c8bae65 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterAppearsInImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.example.named_fragment_inside_inline_fragment.type.Episode
 import com.example.named_fragment_inside_inline_fragment.type.adapter.Episode_ResponseAdapter
@@ -33,7 +34,7 @@ public object CharacterAppearsInImpl_ResponseAdapter {
       }
 
       return CharacterAppearsInImpl.Data(
-        appearsIn = _appearsIn!!
+        appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
index 8b29ba62b94..aad8b70c650 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_inside_inline_fragment/kotlin/responseBased/named_fragment_inside_inline_fragment/fragment/CharacterNameImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object CharacterNameImpl_ResponseAdapter {
       }
 
       return CharacterNameImpl.Data(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
index 2fdec853637..71f0d464546 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.example.named_fragment_with_variables.GetUser
 import kotlin.String
 import kotlin.collections.List
@@ -35,7 +36,7 @@ public object GetUser_ResponseAdapter {
           adapterContext)
 
       return GetUser.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         queryFragment = _queryFragment
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index 6da943b0f7c..79fcba1a898 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -66,8 +67,8 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return com.example.named_fragment_with_variables.fragment.QueryFragment.Organization(
-          id = _id!!,
-          user = _user!!
+          id = _id ?: missingField(reader, "id"),
+          user = _user ?: missingField(reader, "user")
         )
       }
 
@@ -104,7 +105,7 @@ public object QueryFragmentImpl_ResponseAdapter {
               adapterContext)
 
           return com.example.named_fragment_with_variables.fragment.QueryFragment.Organization.User(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             userFragment = _userFragment
           )
         }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
index d6d2bcbccee..1fac24b39bf 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/operationBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -35,9 +36,9 @@ public object UserFragmentImpl_ResponseAdapter {
       }
 
       return com.example.named_fragment_with_variables.fragment.UserFragment(
-        firstName = _firstName!!,
-        lastName = _lastName!!,
-        avatar = _avatar!!
+        firstName = _firstName ?: missingField(reader, "firstName"),
+        lastName = _lastName ?: missingField(reader, "lastName"),
+        avatar = _avatar ?: missingField(reader, "avatar")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
index eb6eaa31b8a..60060563ca2 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/adapter/GetUser_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.named_fragment_with_variables.GetUser
@@ -36,7 +37,7 @@ public object GetUser_ResponseAdapter {
       }
 
       return GetUser.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         organization = _organization
       )
     }
@@ -70,8 +71,8 @@ public object GetUser_ResponseAdapter {
         }
 
         return GetUser.Data.Organization(
-          id = _id!!,
-          user = _user!!
+          id = _id ?: missingField(reader, "id"),
+          user = _user ?: missingField(reader, "user")
         )
       }
 
@@ -109,10 +110,10 @@ public object GetUser_ResponseAdapter {
           }
 
           return GetUser.Data.Organization.User(
-            __typename = __typename!!,
-            firstName = _firstName!!,
-            lastName = _lastName!!,
-            avatar = _avatar!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            firstName = _firstName ?: missingField(reader, "firstName"),
+            lastName = _lastName ?: missingField(reader, "lastName"),
+            avatar = _avatar ?: missingField(reader, "avatar")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index d2e06696f1d..747cb3ce3e2 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -63,8 +64,8 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return QueryFragmentImpl.Data.Organization(
-          id = _id!!,
-          user = _user!!
+          id = _id ?: missingField(reader, "id"),
+          user = _user ?: missingField(reader, "user")
         )
       }
 
@@ -102,10 +103,10 @@ public object QueryFragmentImpl_ResponseAdapter {
           }
 
           return QueryFragmentImpl.Data.Organization.User(
-            __typename = __typename!!,
-            firstName = _firstName!!,
-            lastName = _lastName!!,
-            avatar = _avatar!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            firstName = _firstName ?: missingField(reader, "firstName"),
+            lastName = _lastName ?: missingField(reader, "lastName"),
+            avatar = _avatar ?: missingField(reader, "avatar")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
index 7e0a49c103b..a404c8eb299 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_with_variables/kotlin/responseBased/named_fragment_with_variables/fragment/UserFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -34,9 +35,9 @@ public object UserFragmentImpl_ResponseAdapter {
       }
 
       return UserFragmentImpl.Data(
-        firstName = _firstName!!,
-        lastName = _lastName!!,
-        avatar = _avatar!!
+        firstName = _firstName ?: missingField(reader, "firstName"),
+        lastName = _lastName ?: missingField(reader, "lastName"),
+        avatar = _avatar ?: missingField(reader, "avatar")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/operationBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/operationBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
index 70baa074641..9114c23c6ef 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/operationBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/operationBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -86,7 +87,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           humanDetails = _humanDetails,
           droidDetails = _droidDetails
         )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/responseBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/responseBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
index 1427d3d3eca..318f0c97e4c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/responseBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/named_fragment_without_implementation/kotlin/responseBased/named_fragment_without_implementation/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.named_fragment_without_implementation.TestQuery
@@ -100,8 +101,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -144,8 +145,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -186,8 +187,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/operationBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/operationBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
index 7be95aa54ac..01976ce709a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/operationBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/operationBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -87,7 +88,7 @@ public object TestQuery_ResponseAdapter {
 
         return TestQuery.Data.Hero(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           onHuman = _onHuman,
           onDroid = _onDroid
         )
@@ -173,7 +174,7 @@ public object TestQuery_ResponseAdapter {
 
             return TestQuery.Data.Hero.OnHuman.Friend(
               __typename = __typename,
-              name = _name!!,
+              name = _name ?: missingField(reader, "name"),
               onHuman = _onHuman
             )
           }
@@ -284,7 +285,7 @@ public object TestQuery_ResponseAdapter {
 
             return TestQuery.Data.Hero.OnDroid.Friend(
               __typename = __typename,
-              name = _name!!,
+              name = _name ?: missingField(reader, "name"),
               onHuman = _onHuman
             )
           }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/responseBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/responseBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
index e734b68e4b8..4eda41eae2a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/responseBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_conditional_inline/kotlin/responseBased/nested_conditional_inline/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.nested_conditional_inline.TestQuery
@@ -100,8 +101,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends
         )
       }
@@ -169,8 +170,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.HumanHero.HumanFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             height = _height
           )
         }
@@ -211,8 +212,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.HumanHero.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -252,8 +253,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends
         )
       }
@@ -321,8 +322,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.DroidHero.HumanFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             height = _height
           )
         }
@@ -363,8 +364,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.DroidHero.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -402,8 +403,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_field_with_multiple_fieldsets/kotlin/responseBased/nested_field_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_field_with_multiple_fieldsets/kotlin/responseBased/nested_field_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
index f4ff9ab024a..084285a064f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_field_with_multiple_fieldsets/kotlin/responseBased/nested_field_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_field_with_multiple_fieldsets/kotlin/responseBased/nested_field_with_multiple_fieldsets/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.nested_field_with_multiple_fieldsets.TestQuery
@@ -93,7 +94,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Impl1Iface1(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           iface2 = _iface2
         )
       }
@@ -163,7 +164,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Impl1Iface1.Impl2Iface2(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             scalar1 = _scalar1,
             scalar2 = _scalar2,
             scalar3 = _scalar3,
@@ -215,7 +216,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Impl1Iface1.OtherIface2(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             scalar1 = _scalar1,
             scalar3 = _scalar3
           )
@@ -258,7 +259,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherIface1(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           iface2 = _iface2
         )
       }
@@ -323,7 +324,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.OtherIface1.Impl2Iface2(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             scalar1 = _scalar1,
             scalar2 = _scalar2
           )
@@ -365,7 +366,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.OtherIface1.OtherIface2(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             scalar1 = _scalar1
           )
         }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
index 08ce20f763f..c464c41686f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.nested_named_fragments.AllStarships
@@ -126,7 +127,7 @@ public object AllStarships_ResponseAdapter {
                 adapterContext)
 
             return com.example.nested_named_fragments.AllStarships.Data.AllStarships.Edge.Node(
-              __typename = __typename!!,
+              __typename = __typename ?: missingField(reader, "__typename"),
               starshipFragment = _starshipFragment
             )
           }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
index 681b7387c07..837d3f22aca 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -73,7 +74,7 @@ public object PilotFragmentImpl_ResponseAdapter {
             adapterContext)
 
         return com.example.nested_named_fragments.fragment.PilotFragment.Homeworld(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           planetFragment = _planetFragment
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
index 2ef5dcb0857..f4eafb4679d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/operationBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -39,7 +40,7 @@ public object StarshipFragmentImpl_ResponseAdapter {
       }
 
       return com.example.nested_named_fragments.fragment.StarshipFragment(
-        id = _id!!,
+        id = _id ?: missingField(reader, "id"),
         name = _name,
         pilotConnection = _pilotConnection
       )
@@ -141,7 +142,7 @@ public object StarshipFragmentImpl_ResponseAdapter {
                 adapterContext)
 
             return com.example.nested_named_fragments.fragment.StarshipFragment.PilotConnection.Edge.Node(
-              __typename = __typename!!,
+              __typename = __typename ?: missingField(reader, "__typename"),
               pilotFragment = _pilotFragment
             )
           }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
index cdf9360dcb0..e20fc88d25e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/adapter/AllStarships_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.nested_named_fragments.AllStarships
@@ -130,8 +131,8 @@ public object AllStarships_ResponseAdapter {
             }
 
             return com.example.nested_named_fragments.AllStarships.Data.AllStarships.Edge.Node(
-              __typename = __typename!!,
-              id = _id!!,
+              __typename = __typename ?: missingField(reader, "__typename"),
+              id = _id ?: missingField(reader, "id"),
               name = _name,
               pilotConnection = _pilotConnection
             )
@@ -236,7 +237,7 @@ public object AllStarships_ResponseAdapter {
                   }
 
                   return com.example.nested_named_fragments.AllStarships.Data.AllStarships.Edge.Node.PilotConnection.Edge.Node(
-                    __typename = __typename!!,
+                    __typename = __typename ?: missingField(reader, "__typename"),
                     name = _name,
                     homeworld = _homeworld
                   )
@@ -277,7 +278,7 @@ public object AllStarships_ResponseAdapter {
                     }
 
                     return com.example.nested_named_fragments.AllStarships.Data.AllStarships.Edge.Node.PilotConnection.Edge.Node.Homeworld(
-                      __typename = __typename!!,
+                      __typename = __typename ?: missingField(reader, "__typename"),
                       name = _name
                     )
                   }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
index ce001c525fc..8adfd2a7df0 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/PilotFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -69,7 +70,7 @@ public object PilotFragmentImpl_ResponseAdapter {
         }
 
         return PilotFragmentImpl.Data.Homeworld(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           name = _name
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
index 1be0b576361..004f1763e37 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nested_named_fragments/kotlin/responseBased/nested_named_fragments/fragment/StarshipFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -38,7 +39,7 @@ public object StarshipFragmentImpl_ResponseAdapter {
       }
 
       return StarshipFragmentImpl.Data(
-        id = _id!!,
+        id = _id ?: missingField(reader, "id"),
         name = _name,
         pilotConnection = _pilotConnection
       )
@@ -135,7 +136,7 @@ public object StarshipFragmentImpl_ResponseAdapter {
             }
 
             return StarshipFragmentImpl.Data.PilotConnection.Edge.Node(
-              __typename = __typename!!,
+              __typename = __typename ?: missingField(reader, "__typename"),
               name = _name,
               homeworld = _homeworld
             )
@@ -174,7 +175,7 @@ public object StarshipFragmentImpl_ResponseAdapter {
               }
 
               return StarshipFragmentImpl.Data.PilotConnection.Edge.Node.Homeworld(
-                __typename = __typename!!,
+                __typename = __typename ?: missingField(reader, "__typename"),
                 name = _name
               )
             }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/nonnull/kotlin/responseBased/nonnull/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/nonnull/kotlin/responseBased/nonnull/adapter/TestQuery_ResponseAdapter.kt.expected
index d412be8c5d1..bbbb63c9b92 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/nonnull/kotlin/responseBased/nonnull/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/nonnull/kotlin/responseBased/nonnull/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.nonnull.TestQuery
 import kotlin.String
@@ -32,7 +33,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        hero = _hero!!
+        hero = _hero ?: missingField(reader, "hero")
       )
     }
 
@@ -60,7 +61,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/operationBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/operationBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
index 462c017997d..3487317d7cd 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/operationBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/operationBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -164,7 +165,7 @@ public object TestQuery_ResponseAdapter {
                 adapterContext)
 
             return TestQuery.Data.Root.OnA.OnB(
-              __typename = __typename!!,
+              __typename = __typename ?: missingField(reader, "__typename"),
               bFragment = _bFragment
             )
           }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/responseBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/responseBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
index 34a706479cf..c3bb310417e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/responseBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/not_all_combinations_are_needed/kotlin/responseBased/not_all_combinations_are_needed/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.not_all_combinations_are_needed.TestQuery
@@ -95,7 +96,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.ABRoot(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldA1 = _fieldA1,
           fieldB1 = _fieldB1
         )
@@ -135,7 +136,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherRoot(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operation_id_generator/kotlin/responseBased/operation_id_generator/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operation_id_generator/kotlin/responseBased/operation_id_generator/adapter/TestQuery_ResponseAdapter.kt.expected
index 33c2151a71f..7bf3caf3bdc 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operation_id_generator/kotlin/responseBased/operation_id_generator/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operation_id_generator/kotlin/responseBased/operation_id_generator/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.operation_id_generator.TestQuery
@@ -63,8 +64,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          id = _id!!,
-          name = _name!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/operationBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/operationBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
index 5242a027abf..6ebac4da58d 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/operationBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/operationBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -69,7 +70,7 @@ public object TestOperation_ResponseAdapter {
             adapterContext)
 
         return TestOperation.Data.Animal(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           onAnimal = _onAnimal
         )
       }
@@ -122,7 +123,7 @@ public object TestOperation_ResponseAdapter {
 
           return TestOperation.Data.Animal.OnAnimal(
             __typename = __typename,
-            species = _species!!,
+            species = _species ?: missingField(reader, "species"),
             onWarmBlooded = _onWarmBlooded,
             onPet = _onPet
           )
@@ -166,7 +167,7 @@ public object TestOperation_ResponseAdapter {
             }
 
             return TestOperation.Data.Animal.OnAnimal.OnWarmBlooded(
-              temperature = _temperature!!
+              temperature = _temperature ?: missingField(reader, "temperature")
             )
           }
 
@@ -195,7 +196,7 @@ public object TestOperation_ResponseAdapter {
             }
 
             return TestOperation.Data.Animal.OnAnimal.OnPet(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/responseBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/responseBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
index d79462e2ef5..764bc70b9fe 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/responseBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex7/kotlin/responseBased/operationbased2_ex7/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.operationbased2_ex7.TestOperation
@@ -109,10 +110,10 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.PetWarmBloodedAnimal(
-          __typename = __typename!!,
-          species = _species!!,
-          temperature = _temperature!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          temperature = _temperature ?: missingField(reader, "temperature"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -155,8 +156,8 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.OtherAnimal(
-          __typename = __typename!!,
-          species = _species!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species")
         )
       }
 
@@ -195,9 +196,9 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.OtherWarmBloodedAnimal(
-          __typename = __typename!!,
-          species = _species!!,
-          temperature = _temperature!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          temperature = _temperature ?: missingField(reader, "temperature")
         )
       }
 
@@ -239,9 +240,9 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.OtherPetAnimal(
-          __typename = __typename!!,
-          species = _species!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
index c8188501efb..c2cb623a06c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.operationbased2_ex8.TestOperation
@@ -65,7 +66,7 @@ public object TestOperation_ResponseAdapter {
             adapterContext)
 
         return TestOperation.Data.Animal(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           animalFragment = _animalFragment
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
index 83f919bee85..ee55df4951f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/operationBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import kotlin.Int
@@ -38,8 +39,8 @@ public object AnimalFragmentImpl_ResponseAdapter {
       }
 
       return com.example.operationbased2_ex8.fragment.AnimalFragment(
-        species = _species!!,
-        parent = _parent!!
+        species = _species ?: missingField(reader, "species"),
+        parent = _parent ?: missingField(reader, "parent")
       )
     }
 
@@ -92,7 +93,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
 
         return com.example.operationbased2_ex8.fragment.AnimalFragment.Parent(
           __typename = __typename,
-          species = _species!!,
+          species = _species ?: missingField(reader, "species"),
           onLion = _onLion,
           onCat = _onCat
         )
@@ -136,7 +137,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
           }
 
           return com.example.operationbased2_ex8.fragment.AnimalFragment.Parent.OnLion(
-            temperature = _temperature!!
+            temperature = _temperature ?: missingField(reader, "temperature")
           )
         }
 
@@ -166,7 +167,7 @@ public object AnimalFragmentImpl_ResponseAdapter {
           }
 
           return com.example.operationbased2_ex8.fragment.AnimalFragment.Parent.OnCat(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
index 4a42814c78b..7d45dbdde7b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/adapter/TestOperation_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.operationbased2_ex8.TestOperation
@@ -69,9 +70,9 @@ public object TestOperation_ResponseAdapter {
         }
 
         return TestOperation.Data.Animal(
-          __typename = __typename!!,
-          species = _species!!,
-          parent = _parent!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          parent = _parent ?: missingField(reader, "parent")
         )
       }
 
@@ -142,9 +143,9 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.Animal.LionParent(
-            __typename = __typename!!,
-            species = _species!!,
-            temperature = _temperature!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            species = _species ?: missingField(reader, "species"),
+            temperature = _temperature ?: missingField(reader, "temperature")
           )
         }
 
@@ -186,9 +187,9 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.Animal.CatParent(
-            __typename = __typename!!,
-            species = _species!!,
-            name = _name!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            species = _species ?: missingField(reader, "species"),
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -228,8 +229,8 @@ public object TestOperation_ResponseAdapter {
           }
 
           return TestOperation.Data.Animal.OtherParent(
-            __typename = __typename!!,
-            species = _species!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            species = _species ?: missingField(reader, "species")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
index 2c519865d9d..88dc2454618 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/operationbased2_ex8/kotlin/responseBased/operationbased2_ex8/fragment/AnimalFragmentImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
 import kotlin.String
@@ -37,8 +38,8 @@ public object AnimalFragmentImpl_ResponseAdapter {
       }
 
       return AnimalFragmentImpl.Data(
-        species = _species!!,
-        parent = _parent!!
+        species = _species ?: missingField(reader, "species"),
+        parent = _parent ?: missingField(reader, "parent")
       )
     }
 
@@ -104,9 +105,9 @@ public object AnimalFragmentImpl_ResponseAdapter {
         }
 
         return AnimalFragmentImpl.Data.LionParent(
-          __typename = __typename!!,
-          species = _species!!,
-          temperature = _temperature!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          temperature = _temperature ?: missingField(reader, "temperature")
         )
       }
 
@@ -148,9 +149,9 @@ public object AnimalFragmentImpl_ResponseAdapter {
         }
 
         return AnimalFragmentImpl.Data.CatParent(
-          __typename = __typename!!,
-          species = _species!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -190,8 +191,8 @@ public object AnimalFragmentImpl_ResponseAdapter {
         }
 
         return AnimalFragmentImpl.Data.OtherParent(
-          __typename = __typename!!,
-          species = _species!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          species = _species ?: missingField(reader, "species")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/optional/kotlin/responseBased/optional/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/optional/kotlin/responseBased/optional/adapter/TestQuery_ResponseAdapter.kt.expected
index 633a8c6192c..21e3342a3da 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/optional/kotlin/responseBased/optional/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/optional/kotlin/responseBased/optional/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.optional.TestQuery
@@ -66,7 +67,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           appearsIn = _appearsIn
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/path_vs_flat_accessors/kotlin/responseBased/path_vs_flat_accessors/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/path_vs_flat_accessors/kotlin/responseBased/path_vs_flat_accessors/adapter/TestQuery_ResponseAdapter.kt.expected
index f1a3c73ef9e..00ad0376c32 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/path_vs_flat_accessors/kotlin/responseBased/path_vs_flat_accessors/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/path_vs_flat_accessors/kotlin/responseBased/path_vs_flat_accessors/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.path_vs_flat_accessors.TestQuery
@@ -101,7 +102,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.ABRoot(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldB1 = _fieldB1,
           fieldB2 = _fieldB2
         )
@@ -141,7 +142,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherRoot(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -173,7 +174,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherARoot(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
@@ -207,7 +208,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherBRoot(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           fieldB2 = _fieldB2
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/recursive_selection/kotlin/responseBased/recursive_selection/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/recursive_selection/kotlin/responseBased/recursive_selection/adapter/TestQuery_ResponseAdapter.kt.expected
index a035f88754f..0fc7ffd225c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/recursive_selection/kotlin/responseBased/recursive_selection/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/recursive_selection/kotlin/responseBased/recursive_selection/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.recursive_selection.TestQuery
@@ -66,8 +67,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Tree(
-          name = _name!!,
-          children = _children!!,
+          name = _name ?: missingField(reader, "name"),
+          children = _children ?: missingField(reader, "children"),
           parent = _parent
         )
       }
@@ -102,7 +103,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Tree.Child(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -131,7 +132,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Tree.Parent(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/operationBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/operationBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
index d19204e91a1..858b54e0f77 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/operationBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/operationBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -72,8 +73,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Yield(
-          `while` = _while!!,
-          it = _it!!
+          `while` = _while ?: missingField(reader, "while"),
+          it = _it ?: missingField(reader, "it")
         )
       }
 
@@ -150,7 +151,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Object.OnCharacter(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/responseBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/responseBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
index 34572c8e06d..e00c56ccedc 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/responseBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/reserved_keywords/kotlin/responseBased/reserved_keywords/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.reserved_keywords.TestQuery
@@ -72,8 +73,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Yield(
-          `while` = _while!!,
-          it = _it!!
+          `while` = _while ?: missingField(reader, "while"),
+          it = _it ?: missingField(reader, "it")
         )
       }
 
@@ -135,8 +136,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CharacterObject(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -171,7 +172,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherObject(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 9829b89b129..844a2bc0aaf 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.example.root_query_fragment.TestQuery
 import kotlin.String
 import kotlin.collections.List
@@ -35,7 +36,7 @@ public object TestQuery_ResponseAdapter {
           adapterContext)
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         queryFragment = _queryFragment
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index a791c894a19..ca0b75853b8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/operationBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -35,7 +36,7 @@ public object QueryFragmentImpl_ResponseAdapter {
       }
 
       return com.example.root_query_fragment.fragment.QueryFragment(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero
       )
     }
@@ -68,7 +69,7 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return com.example.root_query_fragment.fragment.QueryFragment.Hero(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 639711c107b..58e12d8e208 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.root_query_fragment.TestQuery
@@ -35,7 +36,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero
       )
     }
@@ -67,7 +68,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index 2c6da6db844..8a1c522e7f9 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment/kotlin/responseBased/root_query_fragment/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -34,7 +35,7 @@ public object QueryFragmentImpl_ResponseAdapter {
       }
 
       return QueryFragmentImpl.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero
       )
     }
@@ -66,7 +67,7 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return QueryFragmentImpl.Data.Hero(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index 45f5d3d04c6..ce27fa92422 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.example.root_query_fragment_with_nested_fragments.TestQuery
 import kotlin.String
 import kotlin.collections.List
@@ -35,7 +36,7 @@ public object TestQuery_ResponseAdapter {
           adapterContext)
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         queryFragment = _queryFragment
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
index 37257a70afc..4439ec29c0b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -35,7 +36,7 @@ public object DroidFragmentImpl_ResponseAdapter {
       }
 
       return com.example.root_query_fragment_with_nested_fragments.fragment.DroidFragment(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
index d6cdd62a52f..3c6a8fde6eb 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,7 +33,7 @@ public object HeroFragmentImpl_ResponseAdapter {
       }
 
       return com.example.root_query_fragment_with_nested_fragments.fragment.HeroFragment(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index 5a0a0d3da52..1f164e886a7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/operationBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -41,7 +42,7 @@ public object QueryFragmentImpl_ResponseAdapter {
       }
 
       return com.example.root_query_fragment_with_nested_fragments.fragment.QueryFragment(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero,
         droid = _droid,
         human = _human
@@ -87,7 +88,7 @@ public object QueryFragmentImpl_ResponseAdapter {
             adapterContext)
 
         return com.example.root_query_fragment_with_nested_fragments.fragment.QueryFragment.Hero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           heroFragment = _heroFragment
         )
       }
@@ -126,7 +127,7 @@ public object QueryFragmentImpl_ResponseAdapter {
             adapterContext)
 
         return com.example.root_query_fragment_with_nested_fragments.fragment.QueryFragment.Droid(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           droidFragment = _droidFragment
         )
       }
@@ -165,7 +166,7 @@ public object QueryFragmentImpl_ResponseAdapter {
             adapterContext)
 
         return com.example.root_query_fragment_with_nested_fragments.fragment.QueryFragment.Human(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           onHuman = _onHuman
         )
       }
@@ -201,7 +202,7 @@ public object QueryFragmentImpl_ResponseAdapter {
           }
 
           return com.example.root_query_fragment_with_nested_fragments.fragment.QueryFragment.Human.OnHuman(
-            name = _name!!,
+            name = _name ?: missingField(reader, "name"),
             homePlanet = _homePlanet
           )
         }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index cc1b1e0bfe7..3ebb100a4ab 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.root_query_fragment_with_nested_fragments.TestQuery
@@ -40,7 +41,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero,
         droid = _droid,
         human = _human
@@ -82,8 +83,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -119,8 +120,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Droid(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -160,8 +161,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Human(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           homePlanet = _homePlanet
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
index a4cfc757d38..c6a738df2d4 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/DroidFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -33,7 +34,7 @@ public object DroidFragmentImpl_ResponseAdapter {
       }
 
       return DroidFragmentImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         primaryFunction = _primaryFunction
       )
     }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
index 6c058445706..68a9bdfded3 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/HeroFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object HeroFragmentImpl_ResponseAdapter {
       }
 
       return HeroFragmentImpl.Data(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
index 308419a7d42..fb5f516c157 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_fragment_with_nested_fragments/kotlin/responseBased/root_query_fragment_with_nested_fragments/fragment/QueryFragmentImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.NullableStringAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.String
@@ -39,7 +40,7 @@ public object QueryFragmentImpl_ResponseAdapter {
       }
 
       return QueryFragmentImpl.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero,
         droid = _droid,
         human = _human
@@ -81,8 +82,8 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return QueryFragmentImpl.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -118,8 +119,8 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return QueryFragmentImpl.Data.Droid(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -159,8 +160,8 @@ public object QueryFragmentImpl_ResponseAdapter {
         }
 
         return QueryFragmentImpl.Data.Human(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           homePlanet = _homePlanet
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/operationBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/operationBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 7bab9d9eaba..a795544f528 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/operationBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/operationBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -45,7 +46,7 @@ public object TestQuery_ResponseAdapter {
           adapterContext)
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         onQuery = _onQuery
       )
     }
@@ -81,7 +82,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OnQuery(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           hero = _hero,
           droid = _droid
         )
@@ -133,8 +134,8 @@ public object TestQuery_ResponseAdapter {
 
           return TestQuery.Data.OnQuery.Hero(
             __typename = __typename,
-            name = _name!!,
-            appearsIn = _appearsIn!!,
+            name = _name ?: missingField(reader, "name"),
+            appearsIn = _appearsIn ?: missingField(reader, "appearsIn"),
             onHuman = _onHuman
           )
         }
@@ -209,7 +210,7 @@ public object TestQuery_ResponseAdapter {
               adapterContext)
 
           return TestQuery.Data.OnQuery.Droid(
-            __typename = __typename!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
             onDroid = _onDroid
           )
         }
@@ -243,7 +244,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.OnQuery.Droid.OnDroid(
-              name = _name!!,
+              name = _name ?: missingField(reader, "name"),
               primaryFunction = _primaryFunction
             )
           }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/responseBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/responseBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index c36dab5c90b..0391d4e35be 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/responseBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/root_query_inline_fragment/kotlin/responseBased/root_query_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.root_query_inline_fragment.TestQuery
@@ -45,7 +46,7 @@ public object TestQuery_ResponseAdapter {
       }
 
       return TestQuery.Data(
-        __typename = __typename!!,
+        __typename = __typename ?: missingField(reader, "__typename"),
         hero = _hero,
         droid = _droid
       )
@@ -114,9 +115,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!,
-          appearsIn = _appearsIn!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn"),
           height = _height
         )
       }
@@ -163,9 +164,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          name = _name!!,
-          appearsIn = _appearsIn!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
+          appearsIn = _appearsIn ?: missingField(reader, "appearsIn")
         )
       }
 
@@ -205,8 +206,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Droid(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/operationBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/operationBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index e21a3468238..15aa0a6192c 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/operationBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/operationBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,8 +33,8 @@ internal object HumanDetailsImpl_ResponseAdapter {
       }
 
       return com.example.simple_fragment.fragment.HumanDetails(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 3620c051a49..34f6e85d3d7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.simple_fragment.TestQuery
@@ -92,8 +93,8 @@ internal object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -128,7 +129,7 @@ internal object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index e480986cc9c..c8218160797 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.Suppress
 import kotlin.collections.List
@@ -61,8 +62,8 @@ internal object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.HumanData(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
@@ -97,7 +98,7 @@ internal object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.OtherData(
-        __typename = __typename!!
+        __typename = __typename ?: missingField(reader, "__typename")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
index e4dc0690040..759c09bcc88 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment/kotlin/responseBased/simple_fragment/fragment/HumanDetailsImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -32,8 +33,8 @@ internal object HumanDetailsImpl_ResponseAdapter {
       }
 
       return HumanDetailsImpl.Data(
-        __typename = __typename!!,
-        name = _name!!
+        __typename = __typename ?: missingField(reader, "__typename"),
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index fe57414e190..3bf3dd74f1b 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.simple_fragment_with_inline_fragments.TestQuery
@@ -65,7 +66,7 @@ public object TestQuery_ResponseAdapter {
             adapterContext)
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           heroDetails = _heroDetails
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index d0e17f73524..ef49c76b9ef 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/operationBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -41,7 +42,7 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return com.example.simple_fragment_with_inline_fragments.fragment.HeroDetails(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         friends = _friends
       )
     }
@@ -96,7 +97,7 @@ public object HeroDetailsImpl_ResponseAdapter {
 
         return com.example.simple_fragment_with_inline_fragments.fragment.HeroDetails.Friend(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           onHuman = _onHuman,
           onDroid = _onDroid
         )
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index 57df61a09a0..fe3a7959eab 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.simple_fragment_with_inline_fragments.TestQuery
@@ -71,8 +72,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends
         )
       }
@@ -141,8 +142,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.HumanFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             height = _height
           )
         }
@@ -185,8 +186,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.DroidFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             primaryFunction = _primaryFunction
           )
         }
@@ -227,8 +228,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index d87ea68d83d..8b960c89ef9 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_fragment_with_inline_fragments/kotlin/responseBased/simple_fragment_with_inline_fragments/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Double
@@ -40,7 +41,7 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.Data(
-        name = _name!!,
+        name = _name ?: missingField(reader, "name"),
         friends = _friends
       )
     }
@@ -106,8 +107,8 @@ public object HeroDetailsImpl_ResponseAdapter {
         }
 
         return HeroDetailsImpl.Data.HumanFriend(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -150,8 +151,8 @@ public object HeroDetailsImpl_ResponseAdapter {
         }
 
         return HeroDetailsImpl.Data.DroidFriend(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -192,8 +193,8 @@ public object HeroDetailsImpl_ResponseAdapter {
         }
 
         return HeroDetailsImpl.Data.OtherFriend(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/operationBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/operationBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 37db65ae799..a523e9c0808 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/operationBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/operationBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -138,8 +139,8 @@ public object TestQuery_ResponseAdapter {
               adapterContext)
 
           return TestQuery.Data.Hero.OnCharacter(
-            __typename = __typename!!,
-            id = _id!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            id = _id ?: missingField(reader, "id"),
             onCharacter = _onCharacter
           )
         }
@@ -174,7 +175,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.Hero.OnCharacter.OnCharacter(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/responseBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/responseBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 0de9b2f1a13..3a312cde6ce 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/responseBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_inline_fragment/kotlin/responseBased/simple_inline_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.simple_inline_fragment.TestQuery
@@ -102,9 +103,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
           height = _height
         )
       }
@@ -153,9 +154,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -201,9 +202,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
index c015884a378..479b1a3194a 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object CatFragmentImpl_ResponseAdapter {
       }
 
       return com.example.simple_union.fragment.CatFragment(
-        meow = _meow!!
+        meow = _meow ?: missingField(reader, "meow")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
index e1bea23b534..a8be753a125 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/operationBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DogFragmentImpl_ResponseAdapter {
       }
 
       return com.example.simple_union.fragment.DogFragment(
-        woof = _woof!!
+        woof = _woof ?: missingField(reader, "woof")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/adapter/AnimalQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/adapter/AnimalQuery_ResponseAdapter.kt.expected
index 9b2165646df..3060f44a545 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/adapter/AnimalQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/adapter/AnimalQuery_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.simple_union.AnimalQuery
@@ -95,8 +96,8 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.CatAnimal(
-          __typename = __typename!!,
-          meow = _meow!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          meow = _meow ?: missingField(reader, "meow")
         )
       }
 
@@ -133,8 +134,8 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.DogAnimal(
-          __typename = __typename!!,
-          woof = _woof!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          woof = _woof ?: missingField(reader, "woof")
         )
       }
 
@@ -169,7 +170,7 @@ public object AnimalQuery_ResponseAdapter {
         }
 
         return AnimalQuery.Data.OtherAnimal(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
index 5f2b4fbe872..2e403d113d2 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/CatFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object CatFragmentImpl_ResponseAdapter {
       }
 
       return CatFragmentImpl.Data(
-        meow = _meow!!
+        meow = _meow ?: missingField(reader, "meow")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
index c2b65fcd2af..9f032745994 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/simple_union/kotlin/responseBased/simple_union/fragment/DogFragmentImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object DogFragmentImpl_ResponseAdapter {
       }
 
       return DogFragmentImpl.Data(
-        woof = _woof!!
+        woof = _woof ?: missingField(reader, "woof")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/starships/kotlin/responseBased/starships/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/starships/kotlin/responseBased/starships/adapter/TestQuery_ResponseAdapter.kt.expected
index 633fa4f027a..163ebd8c226 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/starships/kotlin/responseBased/starships/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/starships/kotlin/responseBased/starships/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.starships.TestQuery
@@ -68,8 +69,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Starship(
-          id = _id!!,
-          name = _name!!,
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
           coordinates = _coordinates
         )
       }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/subscriptions/kotlin/responseBased/subscriptions/adapter/TestSubscription_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/subscriptions/kotlin/responseBased/subscriptions/adapter/TestSubscription_ResponseAdapter.kt.expected
index bb2bbe6190d..98f87478451 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/subscriptions/kotlin/responseBased/subscriptions/adapter/TestSubscription_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/subscriptions/kotlin/responseBased/subscriptions/adapter/TestSubscription_ResponseAdapter.kt.expected
@@ -12,6 +12,7 @@ import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.subscriptions.TestSubscription
@@ -65,8 +66,8 @@ public object TestSubscription_ResponseAdapter {
         }
 
         return TestSubscription.Data.CommentAdded(
-          id = _id!!,
-          content = _content!!
+          id = _id ?: missingField(reader, "id"),
+          content = _content ?: missingField(reader, "content")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/suppressed_warnings/kotlin/responseBased/suppressed_warnings/adapter/CatQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/suppressed_warnings/kotlin/responseBased/suppressed_warnings/adapter/CatQuery_ResponseAdapter.kt.expected
index 397eae823ff..b98581ee6d3 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/suppressed_warnings/kotlin/responseBased/suppressed_warnings/adapter/CatQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/suppressed_warnings/kotlin/responseBased/suppressed_warnings/adapter/CatQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.IntAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.suppressed_warnings.CatQuery
@@ -71,7 +72,7 @@ public object CatQuery_ResponseAdapter {
         }
 
         return CatQuery.Data.Search(
-          mustaches = _mustaches!!
+          mustaches = _mustaches ?: missingField(reader, "mustaches")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/target_name/kotlin/responseBased/target_name/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/target_name/kotlin/responseBased/target_name/adapter/TestQuery_ResponseAdapter.kt.expected
index dfc0db798cc..cf003b991e7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/target_name/kotlin/responseBased/target_name/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/target_name/kotlin/responseBased/target_name/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.target_name.TestQuery
@@ -182,7 +183,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.ReservedObjectUnion(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           `field` = _field
         )
       }
@@ -218,7 +219,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherUnion(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/operationBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/operationBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
index c35af36ed74..9be41544981 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/operationBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/operationBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
 import com.example.test_inline.GetPage
@@ -35,7 +36,7 @@ public object GetPage_ResponseAdapter {
       }
 
       return GetPage.Data(
-        collection = _collection!!
+        collection = _collection ?: missingField(reader, "collection")
       )
     }
 
@@ -77,7 +78,7 @@ public object GetPage_ResponseAdapter {
 
         return GetPage.Data.Collection(
           __typename = __typename,
-          items = _items!!,
+          items = _items ?: missingField(reader, "items"),
           onParticularCollection = _onParticularCollection
         )
       }
@@ -114,7 +115,7 @@ public object GetPage_ResponseAdapter {
           }
 
           return GetPage.Data.Collection.Item(
-            title = _title!!
+            title = _title ?: missingField(reader, "title")
           )
         }
 
@@ -144,7 +145,7 @@ public object GetPage_ResponseAdapter {
           }
 
           return GetPage.Data.Collection.OnParticularCollection(
-            items = _items!!
+            items = _items ?: missingField(reader, "items")
           )
         }
 
@@ -220,7 +221,7 @@ public object GetPage_ResponseAdapter {
               }
 
               return GetPage.Data.Collection.OnParticularCollection.Item.OnParticularItem(
-                image = _image!!
+                image = _image ?: missingField(reader, "image")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/responseBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/responseBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
index 88297255d26..55c62506ce6 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/responseBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/test_inline/kotlin/responseBased/test_inline/adapter/GetPage_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.obj
 import com.example.test_inline.GetPage
 import kotlin.String
@@ -35,7 +36,7 @@ public object GetPage_ResponseAdapter {
       }
 
       return GetPage.Data(
-        collection = _collection!!
+        collection = _collection ?: missingField(reader, "collection")
       )
     }
 
@@ -93,8 +94,8 @@ public object GetPage_ResponseAdapter {
         }
 
         return GetPage.Data.ParticularCollectionCollection(
-          __typename = __typename!!,
-          items = _items!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          items = _items ?: missingField(reader, "items")
         )
       }
 
@@ -158,9 +159,9 @@ public object GetPage_ResponseAdapter {
           }
 
           return GetPage.Data.ParticularCollectionCollection.ParticularItemItem(
-            title = _title!!,
-            __typename = __typename!!,
-            image = _image!!
+            title = _title ?: missingField(reader, "title"),
+            __typename = __typename ?: missingField(reader, "__typename"),
+            image = _image ?: missingField(reader, "image")
           )
         }
 
@@ -200,8 +201,8 @@ public object GetPage_ResponseAdapter {
           }
 
           return GetPage.Data.ParticularCollectionCollection.OtherItem(
-            title = _title!!,
-            __typename = __typename!!
+            title = _title ?: missingField(reader, "title"),
+            __typename = __typename ?: missingField(reader, "__typename")
           )
         }
 
@@ -239,8 +240,8 @@ public object GetPage_ResponseAdapter {
         }
 
         return GetPage.Data.OtherCollection(
-          __typename = __typename!!,
-          items = _items!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          items = _items ?: missingField(reader, "items")
         )
       }
 
@@ -271,7 +272,7 @@ public object GetPage_ResponseAdapter {
           }
 
           return GetPage.Data.OtherCollection.Item(
-            title = _title!!
+            title = _title ?: missingField(reader, "title")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_unique/kotlin/responseBased/two_heroes_unique/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_unique/kotlin/responseBased/two_heroes_unique/adapter/TestQuery_ResponseAdapter.kt.expected
index 916aa2ae4a2..60bc60002b8 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_unique/kotlin/responseBased/two_heroes_unique/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_unique/kotlin/responseBased/two_heroes_unique/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.two_heroes_unique.TestQuery
@@ -67,7 +68,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.R2(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -98,8 +99,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Luke(
-          id = _id!!,
-          name = _name!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_with_friends/kotlin/responseBased/two_heroes_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_with_friends/kotlin/responseBased/two_heroes_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
index a1430c39761..e64a57b0dbc 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_with_friends/kotlin/responseBased/two_heroes_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/two_heroes_with_friends/kotlin/responseBased/two_heroes_with_friends/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.two_heroes_with_friends.TestQuery
@@ -72,8 +73,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.R2(
-          name = _name!!,
-          friendsConnection = _friendsConnection!!
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -166,7 +167,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.R2.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -202,9 +203,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Luke(
-          id = _id!!,
-          name = _name!!,
-          friendsConnection = _friendsConnection!!
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
+          friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
         )
       }
 
@@ -300,7 +301,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.Luke.FriendsConnection.Edge.Node(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/operationBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/operationBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
index 6e6922f0ec1..eab2c0a5d40 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/operationBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/operationBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -41,7 +42,7 @@ public object TestQuery_ResponseAdapter {
 
       return TestQuery.Data(
         hero = _hero,
-        __typename = __typename!!
+        __typename = __typename ?: missingField(reader, "__typename")
       )
     }
 
@@ -133,7 +134,7 @@ public object TestQuery_ResponseAdapter {
 
           return TestQuery.Data.Hero.OnHuman(
             height = _height,
-            __typename = __typename!!
+            __typename = __typename ?: missingField(reader, "__typename")
           )
         }
 
@@ -169,8 +170,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Hero.OnDroid(
-            name = _name!!,
-            __typename = __typename!!,
+            name = _name ?: missingField(reader, "name"),
+            __typename = __typename ?: missingField(reader, "__typename"),
             primaryFunction = _primaryFunction
           )
         }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/responseBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/responseBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
index ff8fc113a93..bb3e500f67f 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/responseBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/typename_always_first/kotlin/responseBased/typename_always_first/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.typename_always_first.TestQuery
@@ -41,7 +42,7 @@ public object TestQuery_ResponseAdapter {
 
       return TestQuery.Data(
         hero = _hero,
-        __typename = __typename!!
+        __typename = __typename ?: missingField(reader, "__typename")
       )
     }
 
@@ -104,7 +105,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.HumanHero(
-          __typename = __typename!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
           height = _height
         )
       }
@@ -144,8 +145,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.DroidHero(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           primaryFunction = _primaryFunction
         )
       }
@@ -184,7 +185,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherHero(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index 6f6e96e1644..36b618d6ee0 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -123,7 +124,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Search.OnStarship(
-            id = _id!!
+            id = _id ?: missingField(reader, "id")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
index b96a5e5e6f9..d14336a1cc7 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/operationBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object StarshipImpl_ResponseAdapter {
       }
 
       return com.example.union_fragment.fragment.Starship(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
index fa8e5450fcc..6bee86ab469 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.union_fragment.TestQuery
@@ -95,9 +96,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.StarshipSearch(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -135,7 +136,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherSearch(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
index 8458cbe284b..c351184c9aa 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_fragment/kotlin/responseBased/union_fragment/fragment/StarshipImpl_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import kotlin.String
 import kotlin.collections.List
 
@@ -30,7 +31,7 @@ public object StarshipImpl_ResponseAdapter {
       }
 
       return StarshipImpl.Data(
-        name = _name!!
+        name = _name ?: missingField(reader, "name")
       )
     }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/operationBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/operationBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index c0576c628fe..768735faa60 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/operationBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/operationBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -129,8 +130,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Search.OnCharacter(
-            id = _id!!,
-            name = _name!!,
+            id = _id ?: missingField(reader, "id"),
+            name = _name ?: missingField(reader, "name"),
             friends = _friends
           )
         }
@@ -233,7 +234,7 @@ public object TestQuery_ResponseAdapter {
               }
 
               return TestQuery.Data.Search.OnCharacter.Friend.OnCharacter(
-                name = _name!!
+                name = _name ?: missingField(reader, "name")
               )
             }
 
@@ -303,7 +304,7 @@ public object TestQuery_ResponseAdapter {
                     adapterContext)
 
                 return TestQuery.Data.Search.OnCharacter.Friend.OnHuman.Friend(
-                  __typename = __typename!!,
+                  __typename = __typename ?: missingField(reader, "__typename"),
                   onCharacter = _onCharacter
                 )
               }
@@ -337,7 +338,7 @@ public object TestQuery_ResponseAdapter {
                   }
 
                   return TestQuery.Data.Search.OnCharacter.Friend.OnHuman.Friend.OnCharacter(
-                    firstAppearsIn = _firstAppearsIn!!
+                    firstAppearsIn = _firstAppearsIn ?: missingField(reader, "firstAppearsIn")
                   )
                 }
 
@@ -407,7 +408,7 @@ public object TestQuery_ResponseAdapter {
                 }
 
                 return TestQuery.Data.Search.OnCharacter.Friend.OnDroid.Friend(
-                  id = _id!!
+                  id = _id ?: missingField(reader, "id")
                 )
               }
 
@@ -439,7 +440,7 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.Search.OnStarship(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/responseBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/responseBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
index 4a57ce78424..ca43c538241 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/responseBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/union_inline_fragments/kotlin/responseBased/union_inline_fragments/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.union_inline_fragments.TestQuery
@@ -104,9 +105,9 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.CharacterSearch(
-          __typename = __typename!!,
-          id = _id!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          id = _id ?: missingField(reader, "id"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends
         )
       }
@@ -184,8 +185,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.CharacterSearch.HumanFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             homePlanet = _homePlanet,
             friends = _friends
           )
@@ -227,8 +228,8 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.CharacterSearch.HumanFriend.Friend(
-              __typename = __typename!!,
-              firstAppearsIn = _firstAppearsIn!!
+              __typename = __typename ?: missingField(reader, "__typename"),
+              firstAppearsIn = _firstAppearsIn ?: missingField(reader, "firstAppearsIn")
             )
           }
 
@@ -271,8 +272,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.CharacterSearch.DroidFriend(
-            __typename = __typename!!,
-            name = _name!!,
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name"),
             primaryFunction = _primaryFunction,
             friends = _friends
           )
@@ -312,7 +313,7 @@ public object TestQuery_ResponseAdapter {
             }
 
             return TestQuery.Data.CharacterSearch.DroidFriend.Friend(
-              id = _id!!
+              id = _id ?: missingField(reader, "id")
             )
           }
 
@@ -347,8 +348,8 @@ public object TestQuery_ResponseAdapter {
           }
 
           return TestQuery.Data.CharacterSearch.OtherFriend(
-            __typename = __typename!!,
-            name = _name!!
+            __typename = __typename ?: missingField(reader, "__typename"),
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -386,8 +387,8 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.StarshipSearch(
-          __typename = __typename!!,
-          name = _name!!
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name")
         )
       }
 
@@ -422,7 +423,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.OtherSearch(
-          __typename = __typename!!
+          __typename = __typename ?: missingField(reader, "__typename")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
index 0c0a0e48dc7..4fc8cee3159 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
@@ -14,6 +14,7 @@ import com.apollographql.apollo3.api.evaluate
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.apollographql.apollo3.api.possibleTypes
@@ -85,7 +86,7 @@ public object HeroDetailQuery_ResponseAdapter {
 
         return com.example.unique_type_name.HeroDetailQuery.Data.HeroDetailQuery(
           __typename = __typename,
-          name = _name!!,
+          name = _name ?: missingField(reader, "name"),
           friends = _friends,
           onHuman = _onHuman
         )
@@ -128,7 +129,7 @@ public object HeroDetailQuery_ResponseAdapter {
           }
 
           return com.example.unique_type_name.HeroDetailQuery.Data.HeroDetailQuery.Friend(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
@@ -197,7 +198,7 @@ public object HeroDetailQuery_ResponseAdapter {
             }
 
             return com.example.unique_type_name.HeroDetailQuery.Data.HeroDetailQuery.OnHuman.Friend(
-              appearsIn = _appearsIn!!,
+              appearsIn = _appearsIn ?: missingField(reader, "appearsIn"),
               friends = _friends
             )
           }
@@ -237,7 +238,7 @@ public object HeroDetailQuery_ResponseAdapter {
                   adapterContext)
 
               return com.example.unique_type_name.HeroDetailQuery.Data.HeroDetailQuery.OnHuman.Friend.Friend(
-                __typename = __typename!!,
+                __typename = __typename ?: missingField(reader, "__typename"),
                 heroDetails = _heroDetails
               )
             }
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index f2882e8e28a..75bc7c7954e 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/operationBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
@@ -37,8 +38,8 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return com.example.unique_type_name.fragment.HeroDetails(
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -136,7 +137,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return com.example.unique_type_name.fragment.HeroDetails.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
index ebd98b2d343..ce806a98377 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/adapter/HeroDetailQuery_ResponseAdapter.kt.expected
@@ -15,6 +15,7 @@ import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.json.readTypename
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.unique_type_name.HeroDetailQuery
@@ -106,8 +107,8 @@ public object HeroDetailQuery_ResponseAdapter {
         }
 
         return com.example.unique_type_name.HeroDetailQuery.Data.HumanHeroDetailQuery(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends,
           height = _height
         )
@@ -152,8 +153,8 @@ public object HeroDetailQuery_ResponseAdapter {
           }
 
           return com.example.unique_type_name.HeroDetailQuery.Data.HumanHeroDetailQuery.Friend(
-            name = _name!!,
-            appearsIn = _appearsIn!!,
+            name = _name ?: missingField(reader, "name"),
+            appearsIn = _appearsIn ?: missingField(reader, "appearsIn"),
             friends = _friends
           )
         }
@@ -196,9 +197,9 @@ public object HeroDetailQuery_ResponseAdapter {
             }
 
             return com.example.unique_type_name.HeroDetailQuery.Data.HumanHeroDetailQuery.Friend.Friend(
-              __typename = __typename!!,
-              name = _name!!,
-              friendsConnection = _friendsConnection!!
+              __typename = __typename ?: missingField(reader, "__typename"),
+              name = _name ?: missingField(reader, "name"),
+              friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
             )
           }
 
@@ -300,7 +301,7 @@ public object HeroDetailQuery_ResponseAdapter {
                   }
 
                   return com.example.unique_type_name.HeroDetailQuery.Data.HumanHeroDetailQuery.Friend.Friend.FriendsConnection.Edge.Node(
-                    name = _name!!
+                    name = _name ?: missingField(reader, "name")
                   )
                 }
 
@@ -341,8 +342,8 @@ public object HeroDetailQuery_ResponseAdapter {
         }
 
         return com.example.unique_type_name.HeroDetailQuery.Data.OtherHeroDetailQuery(
-          __typename = __typename!!,
-          name = _name!!,
+          __typename = __typename ?: missingField(reader, "__typename"),
+          name = _name ?: missingField(reader, "name"),
           friends = _friends
         )
       }
@@ -379,7 +380,7 @@ public object HeroDetailQuery_ResponseAdapter {
           }
 
           return com.example.unique_type_name.HeroDetailQuery.Data.OtherHeroDetailQuery.Friend(
-            name = _name!!
+            name = _name ?: missingField(reader, "name")
           )
         }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
index 05f2cfbc64c..9c18a4c6356 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/unique_type_name/kotlin/responseBased/unique_type_name/fragment/HeroDetailsImpl_ResponseAdapter.kt.expected
@@ -13,6 +13,7 @@ import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
 import com.apollographql.apollo3.api.list
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import kotlin.Int
@@ -37,8 +38,8 @@ public object HeroDetailsImpl_ResponseAdapter {
       }
 
       return HeroDetailsImpl.Data(
-        name = _name!!,
-        friendsConnection = _friendsConnection!!
+        name = _name ?: missingField(reader, "name"),
+        friendsConnection = _friendsConnection ?: missingField(reader, "friendsConnection")
       )
     }
 
@@ -131,7 +132,7 @@ public object HeroDetailsImpl_ResponseAdapter {
             }
 
             return HeroDetailsImpl.Data.FriendsConnection.Edge.Node(
-              name = _name!!
+              name = _name ?: missingField(reader, "name")
             )
           }
 
diff --git a/libraries/apollo-compiler/src/test/graphql/com/example/variable_default_value/kotlin/responseBased/variable_default_value/adapter/TestQuery_ResponseAdapter.kt.expected b/libraries/apollo-compiler/src/test/graphql/com/example/variable_default_value/kotlin/responseBased/variable_default_value/adapter/TestQuery_ResponseAdapter.kt.expected
index cefec8a189e..5558fd4f5d1 100644
--- a/libraries/apollo-compiler/src/test/graphql/com/example/variable_default_value/kotlin/responseBased/variable_default_value/adapter/TestQuery_ResponseAdapter.kt.expected
+++ b/libraries/apollo-compiler/src/test/graphql/com/example/variable_default_value/kotlin/responseBased/variable_default_value/adapter/TestQuery_ResponseAdapter.kt.expected
@@ -11,6 +11,7 @@ import com.apollographql.apollo3.api.CustomScalarAdapters
 import com.apollographql.apollo3.api.StringAdapter
 import com.apollographql.apollo3.api.json.JsonReader
 import com.apollographql.apollo3.api.json.JsonWriter
+import com.apollographql.apollo3.api.missingField
 import com.apollographql.apollo3.api.nullable
 import com.apollographql.apollo3.api.obj
 import com.example.variable_default_value.TestQuery
@@ -61,7 +62,7 @@ public object TestQuery_ResponseAdapter {
         }
 
         return TestQuery.Data.Hero(
-          name = _name!!
+          name = _name ?: missingField(reader, "name")
         )
       }
 
diff --git a/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/MetadataTest.kt b/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/MetadataTest.kt
index 56f21c28c0a..5c1ff506a81 100644
--- a/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/MetadataTest.kt
+++ b/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/MetadataTest.kt
@@ -82,6 +82,7 @@ class MetadataTest {
         addTypename = defaultAddTypename,
         generateOptionalOperationVariables = defaultGenerateOptionalOperationVariables,
         alwaysGenerateTypesMatching = alwaysGenerateTypesMatching,
+        enableCatchAndNullOnlyOnError = false
     )
     val irOperations = ApolloCompiler.buildIrOperations(irOptions)
 
diff --git a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/api/Service.kt b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/api/Service.kt
index c9e9d8caaac..9fffada3469 100644
--- a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/api/Service.kt
+++ b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/api/Service.kt
@@ -634,6 +634,9 @@ interface Service {
   @ApolloExperimental
   val requiresOptInAnnotation: Property<String>
 
+  @ApolloExperimental
+  val enableCatchAndNullOnlyOnError: Property<Boolean>
+
   /**
    * Whether fields with different shape are disallowed to be merged in disjoint types.
    *
diff --git a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateIrTask.kt b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateIrTask.kt
index 17758b3eb80..e0bb8627cb9 100644
--- a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateIrTask.kt
+++ b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateIrTask.kt
@@ -67,6 +67,10 @@ abstract class ApolloGenerateIrTask: DefaultTask() {
   @get:Input
   abstract val alwaysGenerateTypesMatching: SetProperty<String>
 
+  @get:Input
+  @get:Optional
+  abstract val enableCatchAndNullOnlyOnError: Property<Boolean>
+
   @get:OutputFile
   abstract val outputFile: RegularFileProperty
 
@@ -87,6 +91,7 @@ abstract class ApolloGenerateIrTask: DefaultTask() {
         logger = logger(),
         generateOptionalOperationVariables = generateOptionalOperationVariables.getOrElse(defaultGenerateOptionalOperationVariables),
         alwaysGenerateTypesMatching = alwaysGenerateTypesMatching.get(),
+        enableCatchAndNullOnlyOnError = enableCatchAndNullOnlyOnError.getOrElse(false)
     )
 
     ApolloCompiler.buildIrOperations(options).writeTo(outputFile.asFile.get())
diff --git a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateSourcesTask.kt b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateSourcesTask.kt
index 0fcf8539728..dfea1cf8854 100644
--- a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateSourcesTask.kt
+++ b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/ApolloGenerateSourcesTask.kt
@@ -80,6 +80,10 @@ abstract class ApolloGenerateSourcesTask : ApolloGenerateSourcesBase() {
   @get:Optional
   abstract val fieldsOnDisjointTypesMustMerge: Property<Boolean>
 
+  @get:Input
+  @get:Optional
+  abstract val enableCatchAndNullOnlyOnError: Property<Boolean>
+
   @get:Input
   @get:Optional
   abstract val decapitalizeFields: Property<Boolean>
@@ -111,6 +115,7 @@ abstract class ApolloGenerateSourcesTask : ApolloGenerateSourcesBase() {
         logger = logger(),
         generateOptionalOperationVariables = generateOptionalOperationVariables.getOrElse(defaultGenerateOptionalOperationVariables),
         alwaysGenerateTypesMatching = alwaysGenerateTypesMatching.getOrElse(defaultAlwaysGenerateTypesMatching),
+        enableCatchAndNullOnlyOnError = enableCatchAndNullOnlyOnError.getOrElse(false)
     )
 
     val irOperations = ApolloCompiler.buildIrOperations(irOptions)
diff --git a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/DefaultApolloExtension.kt b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/DefaultApolloExtension.kt
index d7891eac781..a26671bb0a2 100644
--- a/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/DefaultApolloExtension.kt
+++ b/libraries/apollo-gradle-plugin-external/src/main/kotlin/com/apollographql/apollo3/gradle/internal/DefaultApolloExtension.kt
@@ -605,6 +605,7 @@ abstract class DefaultApolloExtension(
       task.failOnWarnings.set(service.failOnWarnings)
       task.generateOptionalOperationVariables.set(service.generateOptionalOperationVariables)
       task.alwaysGenerateTypesMatching.set(service.alwaysGenerateTypesMatching())
+      task.enableCatchAndNullOnlyOnError.set(service.enableCatchAndNullOnlyOnError)
 
       task.outputFile.set(BuildDirLayout.ir(project, service))
     }
@@ -782,6 +783,7 @@ abstract class DefaultApolloExtension(
       task.generateDataBuilders.set(service.generateDataBuilders)
       task.fieldsOnDisjointTypesMustMerge.set(service.fieldsOnDisjointTypesMustMerge)
       task.decapitalizeFields.set(service.decapitalizeFields)
+      task.enableCatchAndNullOnlyOnError.set(service.enableCatchAndNullOnlyOnError)
 
       configureBaseCodegenTask(project, task, service)
     }
diff --git a/libraries/apollo-runtime/src/commonMain/kotlin/com/apollographql/apollo3/ApolloClient.kt b/libraries/apollo-runtime/src/commonMain/kotlin/com/apollographql/apollo3/ApolloClient.kt
index aa5ff36d875..6167b7ad5ec 100644
--- a/libraries/apollo-runtime/src/commonMain/kotlin/com/apollographql/apollo3/ApolloClient.kt
+++ b/libraries/apollo-runtime/src/commonMain/kotlin/com/apollographql/apollo3/ApolloClient.kt
@@ -15,8 +15,8 @@ import com.apollographql.apollo3.api.Subscription
 import com.apollographql.apollo3.api.http.HttpHeader
 import com.apollographql.apollo3.api.http.HttpMethod
 import com.apollographql.apollo3.exception.ApolloException
-import com.apollographql.apollo3.exception.ApolloGraphQLException
 import com.apollographql.apollo3.exception.ApolloHttpException
+import com.apollographql.apollo3.exception.NoDataAndNoErrorsException
 import com.apollographql.apollo3.interceptor.ApolloInterceptor
 import com.apollographql.apollo3.interceptor.AutoPersistedQueryInterceptor
 import com.apollographql.apollo3.interceptor.DefaultInterceptorChain
@@ -166,9 +166,8 @@ private constructor(
         .let {
           if (request.useV3ExceptionHandling == true) {
             it.onEach { response ->
-              val exception = response.exception ?: return@onEach
-              if (exception !is ApolloGraphQLException) {
-                throw exception
+              if (response.exception != null && response.exception !is NoDataAndNoErrorsException) {
+                throw response.exception!!
               }
             }
           } else {
diff --git a/tests/catch/build.gradle.kts b/tests/catch/build.gradle.kts
new file mode 100644
index 00000000000..ed01e4e654d
--- /dev/null
+++ b/tests/catch/build.gradle.kts
@@ -0,0 +1,21 @@
+plugins {
+  id("org.jetbrains.kotlin.jvm")
+  id("com.apollographql.apollo3")
+}
+
+apolloTest()
+
+dependencies {
+  implementation(libs.apollo.api)
+  implementation(libs.apollo.testingsupport)
+  testImplementation(libs.kotlin.test)
+  testImplementation(libs.junit)
+  testImplementation(libs.okhttp)
+}
+
+apollo {
+  service("service") {
+    packageName.set("com.example")
+    enableCatchAndNullOnlyOnError.set(true)
+  }
+}
diff --git a/tests/catch/src/main/graphql/operations.graphql b/tests/catch/src/main/graphql/operations.graphql
new file mode 100644
index 00000000000..9c9f617f9c0
--- /dev/null
+++ b/tests/catch/src/main/graphql/operations.graphql
@@ -0,0 +1,19 @@
+query GetUserOrThrow {
+  user {
+    name
+  }
+}
+
+query GetUserPartial {
+  user @catch {
+    name
+  }
+}
+
+query GetNooePartial {
+  nullOnlyOnError @catch
+}
+
+query GetNooeOrThrow {
+  nullOnlyOnError
+}
\ No newline at end of file
diff --git a/tests/catch/src/main/graphql/schema.graphqls b/tests/catch/src/main/graphql/schema.graphqls
new file mode 100644
index 00000000000..c2e734d45ee
--- /dev/null
+++ b/tests/catch/src/main/graphql/schema.graphqls
@@ -0,0 +1,16 @@
+directive @nullOnlyOnError(level: Int = null) on FIELD_DEFINITION
+directive @catch(level: Int = null) on FIELD
+
+type Query {
+  nullable: Int
+  nullOnlyOnError: Int @nullOnlyOnError
+  deep: [[[Int]]] @nullOnlyOnError
+  user: User @nullOnlyOnError
+}
+
+type User {
+  name: String @nullOnlyOnError
+  friends: [User] @nullOnlyOnError
+}
+
+
diff --git a/tests/catch/src/test/kotlin/test/CatchTest.kt b/tests/catch/src/test/kotlin/test/CatchTest.kt
new file mode 100644
index 00000000000..d4a257aecfa
--- /dev/null
+++ b/tests/catch/src/test/kotlin/test/CatchTest.kt
@@ -0,0 +1,104 @@
+package test
+
+import com.apollographql.apollo3.api.CustomScalarAdapters
+import com.apollographql.apollo3.api.json.JsonReader
+import com.apollographql.apollo3.api.json.jsonReader
+import com.apollographql.apollo3.api.parseResponse
+import com.apollographql.apollo3.exception.ApolloException
+import com.example.GetNooeOrThrowQuery
+import com.example.GetNooePartialQuery
+import com.example.GetUserOrThrowQuery
+import com.example.GetUserPartialQuery
+import okio.Buffer
+import org.intellij.lang.annotations.Language
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertIs
+import kotlin.test.assertNull
+
+class CatchTest {
+  @Language("json")
+  val userError = """
+    {
+      "errors": [
+        {
+          "path": ["user", "name"], 
+          "message": "cannot resolve name"
+        }
+      ],
+      "data": {
+        "user": {
+          "name": null
+        }
+      }
+    }
+  """.trimIndent()
+
+  @Language("json")
+  val userSuccess = """
+    {
+      "data": {
+        "user": {
+          "name": "Pancakes"
+        }
+      }
+    }
+  """.trimIndent()
+
+  @Language("json")
+  val nooeError = """
+    {
+      "errors": [
+        {
+          "path": ["nullOnlyOnError"], 
+          "message": "cannot resolve nullOnlyOnError"
+        }
+      ],
+      "data": {
+        "nullOnlyOnError": null
+      }
+    }
+  """.trimIndent()
+
+  private fun String.jsonReader(): JsonReader = Buffer().writeUtf8(this).jsonReader()
+
+  @Test
+  fun simplePartial() {
+    val response = GetNooePartialQuery().parseResponse(nooeError.jsonReader(), null, CustomScalarAdapters.Empty, null)
+
+    assertEquals("cannot resolve nullOnlyOnError", response.data?.nullOnlyOnError?.errorsOrNull()?.single()?.message)
+    assertNull(response.exception)
+  }
+
+  @Test
+  fun simpleThrow() {
+    val response = GetNooeOrThrowQuery().parseResponse(nooeError.jsonReader(), null, CustomScalarAdapters.Empty, null)
+
+    assertNull(response.data)
+    assertIs<ApolloException>(response.exception)
+  }
+
+  @Test
+  fun userPartial() {
+    val response = GetUserPartialQuery().parseResponse(userError.jsonReader(), null, CustomScalarAdapters.Empty, null)
+
+    assertEquals("cannot resolve name", response.data?.user?.errorsOrNull()?.single()?.message)
+    assertNull(response.exception)
+  }
+
+  @Test
+  fun userThrow()  {
+    val response = GetUserOrThrowQuery().parseResponse(userError.jsonReader(), null, CustomScalarAdapters.Empty, null)
+
+    assertNull(response.data)
+    assertIs<ApolloException>(response.exception)
+  }
+
+  @Test
+  fun userSuccess()  {
+    val response = GetUserOrThrowQuery().parseResponse(userSuccess.jsonReader(), null, CustomScalarAdapters.Empty, null)
+
+    assertEquals("Pancakes", response.data?.user?.name)
+    assertNull(response.exception)
+  }
+}
diff --git a/tests/data-builders-kotlin/src/test/kotlin/test/FragmentTest.kt b/tests/data-builders-kotlin/src/test/kotlin/test/FragmentTest.kt
index 293847d220f..f980f5af728 100644
--- a/tests/data-builders-kotlin/src/test/kotlin/test/FragmentTest.kt
+++ b/tests/data-builders-kotlin/src/test/kotlin/test/FragmentTest.kt
@@ -1,12 +1,11 @@
 package test
 
+import com.apollographql.apollo3.exception.DefaultApolloException
 import data.builders.fragment.AnimalDetailsImpl
 import data.builders.fragment.CatDetailsImpl
-import data.builders.fragment.TrivialFragment
 import data.builders.fragment.TrivialFragmentImpl
 import data.builders.type.Animal
 import data.builders.type.buildLion
-import org.junit.Assert.assertNull
 import org.junit.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFails
@@ -44,7 +43,7 @@ class FragmentTest {
     // __typename is unknown so this fails
     // XXX: we could be smarter about this (the parsers are
     // data.builders.fragment.AnimalDetailsImpl_ResponseAdapter$OnAnimal.fromJson(AnimalDetailsImpl_ResponseAdapter.kt:85)
-    assertFailsWith(NullPointerException::class) {
+    assertFailsWith(DefaultApolloException::class) {
       TrivialFragmentImpl.Data(Animal) {
         __typename = "Brontaroc"
         species = "alien"
diff --git a/tests/integration-tests/src/commonTest/kotlin/test/ExceptionsTest.kt b/tests/integration-tests/src/commonTest/kotlin/test/ExceptionsTest.kt
index ff571c30007..80d95410e9d 100644
--- a/tests/integration-tests/src/commonTest/kotlin/test/ExceptionsTest.kt
+++ b/tests/integration-tests/src/commonTest/kotlin/test/ExceptionsTest.kt
@@ -70,7 +70,7 @@ class ExceptionsTest {
 
   @Test
   @Suppress("DEPRECATION")
-  fun toFlowDoesNotThrowOnV3() = runTest(before = { setUp() }, after = { tearDown() }) {
+  fun toFlowDoesNotThrowForGraphQLErrorsOnV3() = runTest(before = { setUp() }, after = { tearDown() }) {
     mockServer.enqueueString("""
         {
           "errors": [
diff --git a/tests/integration-tests/src/commonTest/kotlin/test/ParseResponseBodyTest.kt b/tests/integration-tests/src/commonTest/kotlin/test/ParseResponseBodyTest.kt
index 229ec8f3c00..b76aab27012 100644
--- a/tests/integration-tests/src/commonTest/kotlin/test/ParseResponseBodyTest.kt
+++ b/tests/integration-tests/src/commonTest/kotlin/test/ParseResponseBodyTest.kt
@@ -8,7 +8,6 @@ import com.apollographql.apollo3.api.json.MapJsonReader
 import com.apollographql.apollo3.api.json.jsonReader
 import com.apollographql.apollo3.api.toApolloResponse
 import com.apollographql.apollo3.api.toJsonString
-import com.apollographql.apollo3.exception.ApolloException
 import com.apollographql.apollo3.exception.DefaultApolloException
 import com.apollographql.apollo3.integration.httpcache.AllFilmsQuery
 import com.apollographql.apollo3.integration.httpcache.AllPlanetsQuery
@@ -24,7 +23,6 @@ import testFixtureToJsonReader
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertFalse
-import kotlin.test.assertIs
 import kotlin.test.assertNull
 import kotlin.test.assertTrue
 
@@ -166,12 +164,7 @@ class ParseResponseBodyTest {
   fun fieldMissing() {
     val exception = testFixtureToJsonReader("ResponseDataMissing.json").toApolloResponse(operation = HeroNameQuery()).exception
     if (exception is DefaultApolloException) {
-      // This is the (better) Java codegen case
       assertTrue(exception.message?.contains("Field 'name' is missing") == true)
-    } else {
-      // Kotlin codegen case
-      assertIs<ApolloException>(exception)
-      assertIs<NullPointerException>(exception.cause)
     }
   }