Angular 6 Nested FormGroup Template Validation

Question

My form group structure looks like this (order.component.ts):

this.orderForm = this.formBuilder.group({
  customer: this.formBuilder.group({
    name: ['', Validators.required],
    phone: ['', Validators.required],
    email: ['', Validators.required]
  }),
  ...
});

In the template (order.component.html) I have:

<form [formGroup]="orderForm" (ngSubmit)="onSubmit()">
  <fieldset formGroupName="customer">
    <legend>Customer Information</legend>
    <label for="name">Full name:</label>
    <input type="text" formControlName="name" class="form-control" name="name" id="name" required>
    <small class="form-text text-danger" *ngIf="orderForm.controls['customer'].controls['name'].invalid && (orderForm.controls['customer'].controls['name'].dirty || orderForm.controls['customer'].controls['name'].touched)">Name invalid</small>
  </fieldset>
  ...
</form>

This works, but is a shorter way of expressing orderForm.controls['customer'].controls['name']? For example it would be more succinct for the *ngIf condition to be "name.invalid && (name.dirty || name.touched)"

Answer 1

Yes, that is the correct way to fetch nested form Control and no shortcut.

or you could create some property in your component which points to orderForm.get('customer') form object

private customerForm : FormGroup

And assign it after form initialization

this.customerForm = this.orderForm.get('customer')

and fetch it like {{customerForm.get('name').valid}}