角度 2 异步验证器数组的问题:异步验证器始终返回验证错误



我在使用 angular 2 异步验证器时遇到问题。

我有以下组件:

@Component({
  templateUrl: './send-activation-information.component.html'
})
export class SendActivationInformationComponent implements OnInit {
  activationInformationForm: FormGroup;
  submitted: boolean = false;  
  constructor(private userAccountService: UserAccountService,
              private formBuilder: FormBuilder,
              private router: Router) {
  }
  ngOnInit() {
    this.activationInformationForm = this.formBuilder.group({
      email: ['', [
        Validators.required,
        Validators.pattern(AppConstants.EMAIL_PATTERN)
      ], [
        validateEmailKnownFactory(this.userAccountService),
        validateUserAccountNonActivatedFactory(this.userAccountService)
      ]]
    });
  }
  sendActivationInformation() {
    this.submitted = true;
    if (this.activationInformationForm.valid) {     
        this.userAccountService.sendActivationInformation(this.activationInformationForm.value)
        .subscribe(() => this.router.navigate(['/sendactivationinformation/success']));
    }
  }
}

它使用两个数组中指定的两个同步验证器和两个异步验证器。

出于某种原因,以下异步验证程序始终指示验证错误

export function validateUserAccountNonActivatedFactory(userAccountService: UserAccountService): {[key: string]: any} {
  return (control: AbstractControl) => {
    return userAccountService.userAccountAlreadyActivated(control.value)
      .map(alreadyActivated => alreadyActivated ? {userAccountNonActivatedValidator: {alreadyActivated: true}} : null);
  };
}

。后端调用是否返回falsetrue

仅供参考,userAccountAlreadyActivated对后端进行 http 调用,如下所示:

  userAccountAlreadyActivated(email: string) {
    let body = 'email=' + email;
    return this.http.get(this.urls.USER_ACCOUNT.ALREADY_ACTIVATED + body);
  }

忘了将结果映射到json...

因此,从:

  userAccountAlreadyActivated(email: string) {
    let body = 'email=' + email;
    return this.http.get(this.urls.USER_ACCOUNT.ALREADY_ACTIVATED + body);
  }

自:

  userAccountAlreadyActivated(email: string) {
    let body = 'email=' + email;
    return this.http.get(this.urls.USER_ACCOUNT.ALREADY_ACTIVATED + body).map(res => res.json());
  }

修复了这个问题 - 这与 Angular 验证器无关。

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