fix: fix bug that removeFilteredPolicy is not working properly (#58)

* fix: issues (#57)

* fix: fix bug that removeFilteredPolicy is not working properly

Author: voile-source

src/adapter.ts

@@ -303,28 +303,44 @@ export default class TypeORMAdapter implements FilteredAdapter {
   ) {
     const line = new (this.getCasbinRuleConstructor())();
 
-    line.ptype = ptype;
+    if (ptype) {
+      line.ptype = ptype;
+    }
 
     if (fieldIndex <= 0 && 0 < fieldIndex + fieldValues.length) {
-      line.v0 = fieldValues[0 - fieldIndex];
+      if (fieldValues[0 - fieldIndex]) {
+        line.v0 = fieldValues[0 - fieldIndex];
+      }
     }
     if (fieldIndex <= 1 && 1 < fieldIndex + fieldValues.length) {
-      line.v1 = fieldValues[1 - fieldIndex];
+      if (fieldValues[1 - fieldIndex]) {
+        line.v1 = fieldValues[1 - fieldIndex];
+      }
     }
     if (fieldIndex <= 2 && 2 < fieldIndex + fieldValues.length) {
-      line.v2 = fieldValues[2 - fieldIndex];
+      if (fieldValues[2 - fieldIndex]) {
+        line.v2 = fieldValues[2 - fieldIndex];
+      }
     }
     if (fieldIndex <= 3 && 3 < fieldIndex + fieldValues.length) {
-      line.v3 = fieldValues[3 - fieldIndex];
+      if (fieldValues[3 - fieldIndex]) {
+        line.v3 = fieldValues[3 - fieldIndex];
+      }
     }
     if (fieldIndex <= 4 && 4 < fieldIndex + fieldValues.length) {
-      line.v4 = fieldValues[4 - fieldIndex];
+      if (fieldValues[4 - fieldIndex]) {
+        line.v4 = fieldValues[4 - fieldIndex];
+      }
     }
     if (fieldIndex <= 5 && 5 < fieldIndex + fieldValues.length) {
-      line.v5 = fieldValues[5 - fieldIndex];
+      if (fieldValues[5 - fieldIndex]) {
+        line.v5 = fieldValues[5 - fieldIndex];
+      }
     }
     if (fieldIndex <= 6 && 6 < fieldIndex + fieldValues.length) {
-      line.v6 = fieldValues[6 - fieldIndex];
+      if (fieldValues[6 - fieldIndex]) {
+        line.v6 = fieldValues[6 - fieldIndex];
+      }
     }
 
     await this.getRepository().delete({