angular material autocomplete prevents reactive from setValue from working

问题

Edit: Resolved with Jojofoulk's comment.

when using the autocomplete components of angular-material, I'm trying to use setValue to the input form, but its [matAutocomplete] attribute is preventing setValue from showing on the input.

Inspecting the reactive control reveals the value is right, and removing [matAutocomplete] makes it work, but with it it's just not showing up.

<mat-list-item role="listitem" *ngFor="let skill of curObj.skills;index as ind">
  <div>
    <mat-form-field>
      <input type="text" placeholder="choose skill" aria-label="Number" matInput [formControl]="skill.control" [matAutocomplete]="auto">
      <mat-autocomplete #auto="matAutocomplete" [displayWith]="displayFn" (optionSelected)="optSel($event.option.value,skill)">
        <mat-option *ngFor="let option of skill.filteredOptions | async" [value]="option">
          {{option.name}}
        </mat-option>
      </mat-autocomplete>
    </mat-form-field>
  </div>
</mat-list-item>

skill.control.setValue("some new value");

回答1:

The displayFn takes the input to display it differently (usually a property of an object in your input), but it takes the whole object! You should make sure you are using setValue() to set an object and not just the value you want to display.

The input should hold the whole object when you couple it with the [matAutoComplete] using [displayWith], the displayFn will take care of filling your input.

Little example

来源：https://stackoverflow.com/questions/56454350/angular-material-autocomplete-prevents-reactive-from-setvalue-from-working