mat-form-field必须包含MatFormFieldControl并且已经导入

Question

我收到错误消息ERROR mat-form-field must contain a MatFormFieldControl，这应该意味着我需要在最近的父模块中导入MatFormFieldModule。但是我已经做了，所以我不明白问题出在什么地方...

模板

<form [formGroup]="form" (ngSubmit)="handleSubmit()">
    <mat-form-field>
        <input matInput placeholder="Name" formControlName="name" />
    </mat-form-field>

    <mat-form-field>
        <textarea
            matInput
            placeholder="Active Description"
            formControlName="activeDescription"
        ></textarea>
    </mat-form-field>

    <mat-form-field>
        <textarea
            matInput
            placeholder="Inactive Description"
            formControlName="inactiveDescription"
        ></textarea>
    </mat-form-field>

    <mat-form-field>
        <mat-checkbox formControlName="active">Active</mat-checkbox>
    </mat-form-field>
</form>

模组

import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { MatButtonModule, MatCheckboxModule, MatFormFieldModule, MatInputModule, MatSelectModule } from '@angular/material';
import { EffectsModule } from '@ngrx/effects';
import { StoreModule } from '@ngrx/store';
import { PaymentConfigSelectorComponent } from './payment-config-selector/payment-config-selector.component';
import { PaymentMethodComponent } from './payment-method/payment-method.component';
import { PaymentMethodsComponent } from './payment-methods/payment-methods.component';
import { PaymentRoutingModule } from './payment-routing.module';
import { PaymentEffects } from './payment.effects';
import { paymentReducer } from './payment.reducer';
import { PaymentSmartComponent } from './smart/payment-smart.component';

@NgModule({
  declarations: [PaymentSmartComponent, PaymentMethodsComponent, PaymentConfigSelectorComponent, PaymentMethodComponent ],
  imports: [
    CommonModule,
    PaymentRoutingModule,
    FormsModule,
    ReactiveFormsModule,
    EffectsModule.forFeature([PaymentEffects]),
    StoreModule.forFeature(
      'payment',
      paymentReducer,
    ),
    MatFormFieldModule, MatInputModule, MatSelectModule, MatCheckboxModule, MatButtonModule,
  ],
  providers: [
  ],
})
export class PaymentModule { }

Answer 1

我必须这样做才能让它发挥作用：-

<mat-form-field>
  <input hidden=true matInput> // this gets rid of the error, while the form still uses the input received in the
  mat-checkbox
  <mat-checkbox matInput formControlName="active">Active</mat-checkbox>
</mat-form-field>

Answer 2

我通过添加隐藏的输入字段解决了该问题。

<mat-form-field>
 <mat-label>My Label</mat-label>
 <input matInput [hidden]="true" [(ngModel)]="myModel" name="myModel">
 <mat-checkbox class="ml-3" [(ngModel)]="myModel" name="myModel"></mat-checkbox>
</mat-form-field>

Answer 3

实际上，该错误并不意味着模块导入问题，而是您在使用mat-form-field没有有效控件的情况。

问题在这里：

<mat-form-field>
    <mat-checkbox formControlName="active">Active</mat-checkbox>
</mat-form-field>

MatChebox不应包含在中mat-form-field。Juste取出容器