CODEWITHSUNDEEP
angularangular2-formbuilder
Manoj Sanjeewa
Manoj Sanjeewa

Reputation: 1079

Angular 2 nested form set value

I am using angular formbuilder to create a nested form. How do I set nested form quantity field value for each form group within updateValue() function in following code.

ngOnInit() {
   this.fastPostingForm = this.fb.group({
      Charges: this.fb.array([
        this.initCharge()
      ])
    });
}

initCharge(){
     return this.fb.group({
      room: ['', Validators.required],
      amount: ['', Validators.required],
      quantity: ['', Validators.required],
    });
 }

 UpdateValue(i) {
    this.fastPostingForm.controls.Charges[i].controls['quantity'].setValue(2); // This is not working
 }

Upvotes: 1

Views: 1122

Answers (1)

yurzui
yurzui

Reputation: 214295

It should be:

(this.fastPostingForm.controls.Charges as FormArray).controls[i].controls['quantity']
                                                    .setValue(2)

or

this.fastPostingForm.get(['Charges', i, 'quantity']).setValue(2);

or

this.fastPostingForm.get(`Charges.${i}.quantity`).setValue(2);
                        ^^^
                     backtick

or you can even use patchValue method on your form:

this.fastPostingForm.patchValue({
  Charges: [...Array(i), { quantity: '2' }]
});

Upvotes: 1

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