Angular 形式 - 访问模板中的嵌套控件

Question

我的表单中有一个嵌套的控制组，我想访问它们的表单状态值(如原始和有效)以动态显示验证错误。

是这样动态构建的

controlMap['password'] = this.password;
controlMap['customData'] = this.formBuilder.group(customDataControlMap);
this.form = new FormGroup(controlMap)

来自 obj 就像

{
  controls:{
    password:{} 
    --->nested 
    customData:{
       controls:{
          customerId:{}
       }
    }
  }
}

模板中的 ngClass 看起来很丑

[ngClass]="( !form.controls.customData.controls.customerId.valid && !form.controls.customData.controls.customerId.touched && submitted) ? 'invalid' : ''"

并且在我尝试构建它时无法正常工作 (ng build --prod)

ERROR in ng:///Users/hanche/Desktop/Development/selfbits/beratergruppe-leistungen-webclient/src/app/pages/clients/client-new/client-new.component.html (6,61): Propert y 'controls' does not exist on type 'AbstractControl'.

Answer 1

试试这个

form.get('customData').get('customerId')?.invalid

或

form.get('customData.customerId')

is there a way to avoid function calls in template?

使用 setter/getter

class YourComponent {
  get dataCustomerId() {
    return this.form.get('customData.customerId');
  }
}

模板:

[ngClass]="dataCustomerId?.invalid"

angular forms - accessing nested controls in template