fix(forms): getRawValue should correctly work with nested FormGroups/Arrays (#12964)

Closed #12963

PR Close #12964

modules/@angular/forms/src/model.ts

@@ -1020,7 +1020,7 @@ export class FormGroup extends AbstractControl {
   getRawValue(): any {
     return this._reduceChildren(
         {}, (acc: {[k: string]: AbstractControl}, control: AbstractControl, name: string) => {
-          acc[name] = control.value;
+          acc[name] = control instanceof FormControl ? control.value : (<any>control).getRawValue();
           return acc;
         });
   }
@@ -1321,7 +1321,11 @@ export class FormArray extends AbstractControl {
    * If you'd like to include all values regardless of disabled status, use this method.
    * Otherwise, the `value` property is the best way to get the value of the array.
    */
-  getRawValue(): any[] { return this.controls.map((control) => control.value); }
+  getRawValue(): any[] {
+    return this.controls.map((control: AbstractControl) => {
+      return control instanceof FormControl ? control.value : (<any>control).getRawValue();
+    });
+  }
 
   /** @internal */
   _throwIfControlMissing(index: number): void {

modules/@angular/forms/test/form_array_spec.ts

@@ -32,6 +32,7 @@ export function main() {
   }
 
   describe('FormArray', () => {
+
     describe('adding/removing', () => {
       let a: FormArray;
       let c1: FormControl, c2: FormControl, c3: FormControl;
@@ -81,6 +82,21 @@ export function main() {
       });
     });
 
+    describe('getRawValue()', () => {
+      let a: FormArray;
+
+      it('should work with nested form groups/arrays', () => {
+        a = new FormArray([
+          new FormGroup({'c2': new FormControl('v2'), 'c3': new FormControl('v3')}),
+          new FormArray([new FormControl('v4'), new FormControl('v5')])
+        ]);
+        a.at(0).get('c3').disable();
+        (a.at(1) as FormArray).at(1).disable();
+
+        expect(a.getRawValue()).toEqual([{'c2': 'v2', 'c3': 'v3'}, ['v4', 'v5']]);
+      });
+    });
+
     describe('setValue', () => {
       let c: FormControl, c2: FormControl, a: FormArray;
 

modules/@angular/forms/test/form_group_spec.ts

@@ -8,7 +8,7 @@
 
 import {async, fakeAsync, tick} from '@angular/core/testing';
 import {AsyncTestCompleter, beforeEach, describe, inject, it} from '@angular/core/testing/testing_internal';
-import {AbstractControl, FormControl, FormGroup, Validators} from '@angular/forms';
+import {AbstractControl, FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
 
 import {EventEmitter} from '../src/facade/async';
 import {isPresent} from '../src/facade/lang';
@@ -62,6 +62,24 @@ export function main() {
       });
     });
 
+    describe('getRawValue', () => {
+      let fg: FormGroup;
+
+      it('should work with nested form groups/arrays', () => {
+        fg = new FormGroup({
+          'c1': new FormControl('v1'),
+          'group': new FormGroup({'c2': new FormControl('v2'), 'c3': new FormControl('v3')}),
+          'array': new FormArray([new FormControl('v4'), new FormControl('v5')])
+        });
+        fg.get('group').get('c3').disable();
+        (fg.get('array') as FormArray).at(1).disable();
+
+        expect(fg.getRawValue())
+            .toEqual({'c1': 'v1', 'group': {'c2': 'v2', 'c3': 'v3'}, 'array': ['v4', 'v5']});
+      });
+
+    });
+
     describe('adding and removing controls', () => {
       it('should update value and validity when control is added', () => {
         const g = new FormGroup({'one': new FormControl('1')});