在Angular5中无法正确显示表单的验证错误

时间:2018-08-07 12:52:00

标签: angular typescript angular5 angular4-forms

每当我在城市输入框中键入内容时,都会在HTML上显示errorMessage,但如果城市正确(例如,根据regex测试没有数字,特殊字符),它可以让我保存表单。问题是无论城市正确与否,错误消息都会不断出现在HTML端。就像在按键上一样,它将始终显示错误消息。

下面是我的ts方法

validateCity() {
    this.mailingAddress.city.error = false;
    this.mailingAddress.city.errorMessage = '';
    let hasErrors: boolean = false;
    let regEx = new RegExp(/^[a-zA-Z]+(?:[\s-][a-zA-Z]+)*$/);
    if (regEx.test(this.mailingAddress.city)) {
      return false;
    } else{
      hasErrors = true;
      this.mailingAddress.city.error = true;
      this.mailingAddress.city.errorMessage = 'Invalid City';
    }
    return hasErrors;
  }

下面是我的HTML文件

 <div class="city-info-container row">
            <div class="col-sm-6 pb-3 city-wrapper">
              <label for="mailingCity" class="required">City</label>
              <div class="input-wrapper">
                <input type="text" [maxLength]="255" name="mailingCity" placeholder="Enter City" [disabled]="setAsResidential" [(ngModel)]="mailingAddress.city.value"
                (keyup)="validateCity()" (blur)="validateCity()"
                >
              </div>
              <!-- end .input-wrapper -->
              <div class="clearfix"></div>
              <p *ngIf="mailingAddress.city.error" class="clearfix error-message">
                <i class="fa fa-exclamation-triangle" aria-hidden="true"></i> {{mailingAddress.city.errorMessage}}</p>
            </div>

1 个答案:

答案 0 :(得分:1)

在Typescript文件的第6行中,您传递的是对象而不是字符串。也许应该是:

if (regEx.test(this.mailingAddress.city.value))