mat-form-field必须包含MatFormFieldControl [英] mat-form-field must contain a MatFormFieldControl

问题描述

我们正在尝试在我们的公司构建自己的form-field-Components.我们正在尝试像这样包装材料设计的组件:

We are trying to build our own form-field-Components at our Company. We are trying to wrap material design's Components like this:

字段:

<mat-form-field>
    <ng-content></ng-content>
    <mat-hint align="start"><strong>{{hint}}</strong> </mat-hint>
    <mat-hint align="end">{{message.value.length}} / 256</mat-hint>
    <mat-error>This field is required</mat-error>
</mat-form-field>

文本框:

<field hint="hint">
    <input matInput 
    [placeholder]="placeholder" 
    [value]="value"
    (change)="onChange($event)" 
    (keydown)="onKeydown($event)" 
    (keyup)="onKeyup($event)" 
    (keypress)="onKeypress($event)">
</field>

用法:

<textbox value="test" hint="my hint"></textbox>

这大约等于:

    <textbox  placeholder="Personnummer/samordningsnummer" value="" ng-reflect-placeholder="Personnummer/samordningsnummer">
       <field>
          <mat-form-field class="mat-input-container mat-form-field>
             <div class="mat-input-wrapper mat-form-field-wrapper">
                <div class="mat-input-flex mat-form-field-flex">
                   <div class="mat-input-infix mat-form-field-infix">
                      <input _ngcontent-c4="" class="mat-input-element mat-form-field-autofill-control" matinput="" ng-reflect-placeholder="Personnummer/samordningsnummer" ng-reflect-value="" id="mat-input-2" placeholder="Personnummer/samordningsnummer" aria-invalid="false">
                      <span class="mat-input-placeholder-wrapper mat-form-field-placeholder-wrapper"></span>
                   </div>
                </div>
                <div class="mat-input-underline mat-form-field-underline">
                   <span class="mat-input-ripple mat-form-field-ripple"></span>
                </div>
                <div class="mat-input-subscript-wrapper mat-form-field-subscript-wrapper"></div>
             </div>
          </mat-form-field>
       </field>
    </textbox>

但是我得到 控制台中的"mat-form-field必须包含MatFormFieldControl" .我想这与不直接包含matInput-field的mat-form-field有关.但是它包含了它，只是带有ng-content投影.

But I'm getting "mat-form-field must contain a MatFormFieldControl" in the console. I guess this has to do with mat-form-field not directly containing a matInput-field. But it is containing it, it's just withing the ng-content projection.

这是一场闪电战: https://stackblitz.com/edit/angular-xpvwzf

推荐答案

不幸的是，尚不支持将内容投影到mat-form-field中. 请跟踪以下 github问题以获取有关此问题的最新消息.

Unfortunately content projection into mat-form-field is not supported yet. Please track the following github issue to get the latest news about it.

现在，唯一适合您的解决方案是将内容直接放入mat-form-field组件中，或者实现MatFormFieldControl类，从而创建自定义表单字段组件.

By now the only solution for you is either place your content directly into mat-form-field component or implement a MatFormFieldControl class thus creating a custom form field component.

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