表单名称在模板驱动的表单角度4中没有改变

Question

数组拼接后 *ngFor 不更新表单输入名称。

 <div class="row p-t-20" *ngFor="let multiple_option of questions.options; let i=index">
<div class="col-md-10">
  <div class="form-group">
    <label class="control-label">Option {{i + 1}}</label>

    <input type="text" [(ngModel)]="multiple_option.value"  class="form-control" name="radioBtn_{{i}}" #radioBtn="ngModel" required >

  </div>
</div>

<div class="col-md-1">
  <button type="button" class="btn btn-success btn-circle" (click)="addOption()"><i class="fa fa-plus"></i> </button>
</div>

<div class="col-md-1" [hidden]="i == 0">
  <button type="button" class="btn btn-warning btn-circle" (click)="removeOption(i)"><i class="fa fa-minus"></i> </button>
</div>

{{f.value | json}}

{ “问题0”：“scascsac”， "selectElem0": "radio_button", “is_other0”：假， “radioBtn_0”：“ascsacsac”， "radioBtn_2": "asccscascssaccsacsscsca", “radioBtn_3”：“ascsacsacsacsacsac” }

addOption(){

this.f._submitted = false;
this.questions.options.push({logic : {}});

}

删除选项（索引）{

this.questions.options.splice(index,1);

console.log(this.questions.options);

}

我在下面的链接中复制了上述场景：

https://stackblitz.com/edit/angular-kzyfky?file=app%2Fapp.component.html

Answer 1

删除名称并添加 [ngModelOptions]="{standalone: true}"