Angular 2单选按钮验证

Question

我试图通过模板驱动但不工作来验证角度2中的单选按钮。我在谷歌搜索也没有人正确回答。任何天才都可以回答这个问题？

https://stackblitz.com/edit/angular-zpyekb?file=src/app/app.component.html

app.component.html

 <form #f="ngForm"> 
<div *ngFor="let option of options">
<div class="radio">
<input type="radio"
           name="radio"
           id="radio-{{option.id}}"
           [(ngModel)]="value"
           [value]="option.value"/> 
    <label for="radio-{{option.id}}">{{option.id}}
    </label> 
 </div>
 </div>

 <div *ngIf="f.submitted">Please select</div>

 <button>Submit</button>
 </form>

Answer 1

<div *ngFor="let option of options">
        <div class="radio">
            <input type="radio"
               name="radio"
               id="radio-{{option.id}}"
               [(ngModel)]="value"
               [value]="option.value"
               required

               /> 
        <label for="radio-{{option.id}}">{{option.id}}
        </label> 
    </div>
  </div>

  <div *ngIf="f.submitted && !f.valid">Please select</div>


May be you are looking for the above validation. If not can you please help to know what exactly you are looking for ?