form validation from apche server using http
this.authForm = fb.group({
‘email’ : [null, Validators.compose([Validators.required, EmailExists.existsEmail ])]
})
email validator
export class EmailExists {
static existsEmail(fc: FormControl): ValidationResult } {
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let data='email='+fc.value;
http.post('http://localhost/shirtmela/API/registration_email_check.php',data,{headers: headers})
.map(res => res.json())
.subscribe(data => {
let posts = data.msg;
if(posts=='success'){
return ({existsEmail: true});
}else{
return (null);
}
}, (err) => {
return (null);
});
}
}
How can i solve this problem using static method. Thanks in advance.
I would suggest not using a static method. Use a lambda instead:
let emailValidator = (fc: FormControl) => {
// do stuff. `this` is reliable in here.
};
html
<div class="error-box" *ngIf="authForm.controls['email'].hasError('validEmail') && authForm.controls['email'].touched">* Invalid Email</div>
ts file
import { EmailExists } from '../../providers/email-exists';
let validEmail = (fc: FormControl) => this.emailExists.emailCheck(fc.value);
'email' : [null, Validators.compose([ Validators.required, Validators.minLength(5), Validators.maxLength(50), validEmail ])]
providers
import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import 'rxjs/add/operator/map';
@Injectable()
export class EmailExists {
data:any;
constructor(private http: Http) { }
loadProduct(email:any) {
return this.http.get('http://localhost/shirtmela/API/registration_email_check.php?email='+email)
.map((res: Response) => res.json()).subscribe(
res => {
res ? {} : {"existsEmail": true}
}, (err) => {
null;
});
}
}
Am i wrong here. Thanks for your reply.
You’re returning a Subscription instead of an Observable. Don’t call subscribe inside of loadProduct().