我的表单组结构如下所示(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>
这可行,但是是一种更简短的表达方式
orderForm.controls['customer'].controls['name']
?例如,*ngIf 条件为 "name.invalid && (name.dirty || name.touched)"
会更简洁
我遇到了同样的问题。我的主要问题是使用
ng build --prod
时 orderForm.controls['customer'].controls['name']
失败并出现错误:
“AbstractControl”类型上不存在属性“controls”。
显然这只是模板编译为 TS 时的类型问题。
我的方法是为嵌套表单组创建 getter 并转换正确的类型,这可以解决我的问题和你的问题:
get customer() {
return this.orderForm.controls.customer as FormGroup;
}
在 HTML 中使用:
<small class="form-text text-danger" *ngIf="customer.controls['name'].invalid && (customer.controls['name'].dirty || customer.controls['name'].touched)">Name invalid</small>
是的,这是获取嵌套表单控件的正确方法,没有快捷方式。
或者您可以在组件中创建一些指向
orderForm.get('customer')
表单对象 的属性
private customerForm : FormGroup
并在表单初始化后分配它
this.customerForm = this.orderForm.get('customer')
然后像
{{customerForm.get('name').valid}}
一样获取它
Angular 16:我遇到了同样的问题,并通过在 .ts 文件中设置标志来解决它。
.ts 文件:
Public customerValid: boolean = true;
onSubmit() {
this.customerValid = (this.form.controls['customer'] as FormGroup).controls['name'].valid;
....
}
.html:
<form [formGroup]="orderForm" (ngSubmit)="onSubmit()">
<div formGroupName="customer">
<legend>Customer Information</legend>
<label for="name">Full name:</label>
<input type="text" formControlName="name"
[ngClass]="{ 'is-invalid': submitted && !customerValid}" />
<div *ngIf="submitted && !customerValid" class="invalid-feedback">
<div *ngIf="!customerValid"> Name is required</div>
</div>
</div>
</form>