I want validate the item name text must be unique. I have refered SO links, but links examples are not working for me. I tried to comment on respective answer, but I don't have a much reputation to do that.
Link 1: Angular - Uniqueness validator in FormArray
Link 2 : Unique value validation in FormControl of FormArray
below is my current code:
import { Component,OnInit } from '@angular/core';
import { FormGroup,FormBuilder,FormArray } from "@angular/forms"
import { RxwebValidators } from "@rxweb/reactive-form-validators"
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent implements OnInit {
public uniqueRowForm: FormGroup;
constructor(private fb:FormBuilder){
}
ngOnInit() {
this.uniqueRowForm = this.fb.group({
items:this.fb.array([]),
});
this.adduserItem();
}
adduserItem(){
let items = <FormArray>this.uniqueRowForm.controls.items;
items.push(this.fb.group({
name:['',RxwebValidators.unique()]
}));
}
}below is my HTML code:
<button (click)="adduserItem()">Add Item </button>
<table class="table">
<thead>
<tr>
<th scope="col">Item</th>
</tr>
</thead>
<tbody>
<tr [formGroup]="item" *ngFor="let item of uniqueRowForm.controls.items.controls;let i = index;">
<td><input type="text" formControlName="name" class="form-control" />
<span *ngIf="item.controls.name.errors.unique">not unique</span>
</td>
</tr>
</tbody>
</table>Stackblitz example but not working as per my requirement : https://stackblitz.com/edit/angular-paqxqs?file=src%2Fapp%2Fapp.component.html
Please help.
