我的表单组结构如下(order.component.ts):
this.orderForm = this.formBuilder.group({
customer: this.formBuilder.group({
name: ['', Validators.required],
phone: ['', Validators.required],
email: ['', Validators.required]
}),
...
});
在模板(order.component.html)中,我有:
<form [formGroup]="orderForm" (ngSubmit)="onSubmit()">
<fieldset formGroupName="customer">
<legend>Customer Information</legend>
<label for="name">Full name:</label>
<input type="text" formControlName="name" class="form-control" name="name" id="name" required>
<small class="form-text text-danger" *ngIf="orderForm.controls['customer'].controls['name'].invalid && (orderForm.controls['customer'].controls['name'].dirty || orderForm.controls['customer'].controls['name'].touched)">Name invalid</small>
</fieldset>
...
</form>
这有效,但是是表达orderForm.controls['customer'].controls['name']
的较短方法吗?例如,将* ngIf条件设为"name.invalid && (name.dirty || name.touched)"
答案 0 :(得分:2)
是的,这是获取嵌套表单控件且没有快捷方式的正确方法。
或者您可以在组件中创建一些属性,这些属性指向orderForm.get('customer')
表单对象
private customerForm : FormGroup
并在表单初始化后分配
this.customerForm = this.orderForm.get('customer')
并像{{customerForm.get('name').valid}}
答案 1 :(得分:0)
我遇到了同样的问题。我的主要问题是,ng build --prod
在使用orderForm.controls['customer'].controls['name']
时出现错误:
类型“ AbstractControl”上不存在属性“控件”。
当模板被编译为TS时,显然这只是类型问题。
我的方法是为嵌套表单组创建getter并转换正确的类型,从而解决我和你的问题:
get customer() {
return this.orderForm.controls.customer as FormGroup;
}
用于HTML:
<small class="form-text text-danger" *ngIf="customer.controls['name'].invalid && (customer.controls['name'].dirty || customer.controls['name'].touched)">Name invalid</small>