filter null values in multi part and get requests

Author: ChiragAgg5k

templates/dart/lib/src/client_mixin.dart.twig

@@ -18,14 +18,19 @@ mixin ClientMixin {
       request = http.MultipartRequest(method.name(), uri);
       if (params.isNotEmpty) {
         params.forEach((key, value) {
+          if (value == null) {
+            return;
+          }
           if (value is http.MultipartFile) {
             (request as http.MultipartRequest).files.add(value);
           } else {
             if (value is List) {
               value.asMap().forEach((i, v) {
-                (request as http.MultipartRequest)
-                    .fields
-                    .addAll({"$key[$i]": v.toString()});
+                if (v != null) {
+                  (request as http.MultipartRequest)
+                      .fields
+                      .addAll({"$key[$i]": v.toString()});
+                }
               });
             } else {
               (request as http.MultipartRequest)
@@ -37,15 +42,19 @@ mixin ClientMixin {
       }
     } else if (method == HttpMethod.get) {
       if (params.isNotEmpty) {
-        params = params.map((key, value){
-          if (value is int || value is double) {
-            return MapEntry(key, value.toString());
-          }
-          if (value is List) {
-            return MapEntry("$key[]", value);
+        Map<String, dynamic> filteredParams = {};
+        params.forEach((key, value) {
+          if (value != null) {
+            if (value is int || value is double) {
+              filteredParams[key] = value.toString();
+            } else if (value is List) {
+              filteredParams["$key[]"] = value;
+            } else {
+              filteredParams[key] = value;
+            }
           }
-          return MapEntry(key, value);
         });
+        params = filteredParams;
       }
       uri = Uri(
           fragment: uri.fragment,

templates/flutter/lib/src/client_mixin.dart.twig

@@ -18,14 +18,19 @@ mixin ClientMixin {
       request = http.MultipartRequest(method.name(), uri);
       if (params.isNotEmpty) {
         params.forEach((key, value) {
+          if (value == null) {
+            return;
+          }
           if (value is http.MultipartFile) {
             (request as http.MultipartRequest).files.add(value);
           } else {
             if (value is List) {
               value.asMap().forEach((i, v) {
-                (request as http.MultipartRequest).fields.addAll({
-                  "$key[$i]": v.toString(),
-                });
+                if (v != null) {
+                  (request as http.MultipartRequest).fields.addAll({
+                    "$key[$i]": v.toString(),
+                  });
+                }
               });
             } else {
               (request as http.MultipartRequest).fields.addAll({
@@ -37,15 +42,19 @@ mixin ClientMixin {
       }
     } else if (method == HttpMethod.get) {
       if (params.isNotEmpty) {
-        params = params.map((key, value){
-          if (value is int || value is double) {
-            return MapEntry(key, value.toString());
-          }
-          if (value is List) {
-            return MapEntry("$key[]", value);
+        Map<String, dynamic> filteredParams = {};
+        params.forEach((key, value) {
+          if (value != null) {
+            if (value is int || value is double) {
+              filteredParams[key] = value.toString();
+            } else if (value is List) {
+              filteredParams["$key[]"] = value;
+            } else {
+              filteredParams[key] = value;
+            }
           }
-          return MapEntry(key, value);
         });
+        params = filteredParams;
       }
       uri = Uri(
         fragment: uri.fragment,