Created
May 4, 2017 19:05
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async validation with debounce listening to value change
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| import { Component, OnInit } from '@angular/core';'; | |
| import { FormBuilder, FormGroup, Validators, AbstractControl, ValidationErrors } from '@angular/forms'; | |
| import { Router } from '@angular/router' | |
| import { CommonValidators } from '../service/CommonValidator'; | |
| import { Response } from '@angular/http'; | |
| import { Observable } from 'rxjs/Observable'; | |
| import { GlobalService } from '../../shared/service/global.service'; | |
| import { AuthHttp } from 'angular2-jwt' | |
| declare var $: any; | |
| import 'rxjs/add/operator/delay'; | |
| import 'rxjs/add/operator/switchMap'; | |
| import 'rxjs/add/operator/debounceTime'; | |
| import 'rxjs/add/operator/distinctUntilChanged'; | |
| @Component({ | |
| selector: 'app-sign-up', | |
| templateUrl: 'signup.test.component.html', | |
| styleUrls: ['./signup.component.css'] | |
| }) | |
| export class SignUpComponent implements OnInit { | |
| registrationForm: FormGroup; | |
| isRegistered: boolean = false; | |
| errorMessages: any; | |
| isLoading: boolean; | |
| baseurl: string; | |
| emailLoading:boolean; | |
| constructor(private http: AuthHttp, private builder: FormBuilder, | |
| private global: GlobalService, private router: Router, ) { | |
| this.baseurl = global.baseUrl; | |
| this.registrationForm = this.builder.group({ | |
| username: ['', Validators.required, this.usernameValidation.bind(this)], | |
| email: ['', Validators.required, this.emailValidation.bind(this), CommonValidators.email], | |
| password: ['', [Validators.required, Validators.minLength(6)]], | |
| passwordConfirm: ['', [Validators.required, Validators.minLength(6)]] | |
| }, { validator: CommonValidators.matchingPasswords('password', 'passwordConfirm') }); | |
| emailValidation(ctr: AbstractControl) { | |
| this.emailLoading = true; | |
| return ctr | |
| .valueChanges | |
| .delay(800) | |
| .debounceTime(800) | |
| .distinctUntilChanged() | |
| .switchMap(value => this.http.get(`${this.baseurl}/api/v2/auth/email-availablity/${value}/`)) | |
| .map(res => res.json()) | |
| .map(res => { | |
| this.emailLoading = false; | |
| if (res.message === true) { | |
| return ctr.setErrors(null); | |
| } else { | |
| return ctr.setErrors({ emailValidation: 'email already exist' }) | |
| } | |
| }) | |
| } | |
| } |
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Thanks for that validator! I try to resolve the problem with debounceTime in async validator about three days.