You are close. See code example below or play with it on the very simple (and ugly) StackBlitz I created.
StackBlitz Demo
In your template be sure to add your child form group.
<div>
<form [formGroup]="myForm" (ngSubmit)="send()">
<input type="text" name="name" formControlName="name">
<div formGroupName="child">
<input type="text" name="id" formControlName="id">
<input type="text" name="name" formControlName="name">
</div>
<button class="btn btn-primary">send</button>
</form>
</div>
Then in your component you can access the fields like so.
this.myForm['controls'].child['controls'].id.valid
The reactive form I created for this example:
this.myForm = this.fb.group({
name: ['', [Validators.maxLength(500)]],
child: this.fb.group({
id: ['', [Validators.required]],
name: ['']
})
});
**Update Dec 2019**
My original answer is a bit dated. There is now a much cleaner way of accomplishing this! Below is example code of the cleaner solution.
this.myForm.get('child.id').valid
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…