角度自定义验证

时间:2017-07-31 09:03:34

标签: angular validation

我有passwordconfirm_password字段的注册表单。我有自定义验证来检查这些密码是否相同。问题是:当我在password字段中输入'qwerty123'而在qwerty123字段中输入password_confirm时,一切都很好。但是,如果我然后在4字段中添加一些字符confirm_password,然后将相同的字符4添加到password字段,则表单将无效(属性validfalse),我无法用它做任何事情。

我在这里查看了类似的解决方案,但那些有用的东西对我没用。

我的组成部分:

  public userNameInput: FormControl = new FormControl('', [
    Validators.minLength(this.limits['username'][0]),
    Validators.maxLength(this.limits['username'][1])
  ]);
  public emailInput: FormControl = new FormControl('', [
    Validators.required,
    RegisterFormComponent.checkEmail
  ]);
  public passwordInput: FormControl = new FormControl('', [
    Validators.required,
    Validators.minLength(this.limits['password'][0]),
    Validators.maxLength(this.limits['password'][1]),
    RegisterFormComponent.checkPasswordsMatching
  ]);
  public confirmPasswordInput: FormControl = new FormControl('', [
    Validators.required,
    RegisterFormComponent.checkPasswordsMatching
  ]);

  public registrationForm: FormGroup = this.formBuilder.group({
    userName: this.userNameInput,
    email: this.emailInput,
    password: this.passwordInput,
    confirmPassword: this.confirmPasswordInput
  });

  private static checkPasswordsMatching(input: FormControl): null | { [ key: string ]: boolean } {
    if (!input.root || !input.root.get('password')) {
      return null;
    }

    return (
      (
        input.root.get('password').value === '' ||
        input.root.get('confirmPassword').value === ''
      )
      ||
      input.root.get('password').value === 
      input.root.get('confirmPassword').value
    )
      ? null
      : { mismatched: true };
  }

我的HTML来自模板:

<input
  type="text"
  name="username"
  id="username"
  [formControl]="userNameInput"
  [class.error]="
    userNameInput.hasError('minlength') || 
    userNameInput.hasError('maxlength')
  "
>
<input
  id="email"
  type="text"
  name="email"
  [formControl]="emailInput"
  [class.error]="
    !emailInput.pristine &&
     emailInput.hasError('invalid')
  "
>
<input
  type="password"
  name="password"
  id="password"
  [formControl]="passwordInput"
  [class.error]="
    passwordInput.hasError('minlength') ||
    passwordInput.hasError('maxlength') ||
    confirmPasswordInput.hasError('mismatched')
  "
>
<input
  type="password"
  name="password_confirm"
  id="password_confirm"
  [formControl]="confirmPasswordInput"
  [class.error]="
    passwordInput.hasError('mismatched') ||
    confirmPasswordInput.hasError('mismatched')
  "
>
<button
    [disabled]="!registrationForm.valid"
>Confirm</button>

1 个答案:

答案 0 :(得分:1)

这是因为angular不会在其他输入上重新运​​行验证器,只是在当前正在输入的用户上。您可以使用updateValueAndValidity在另一个输入上重新运​​行验证器。

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