title: How to bind to radio buttons in angular2 beta 6
body: <p>How does one achieve radio button binding in beta 6?</p>
  
  <p>I found a great plnkr for beta 0 (see <a href="http://plnkr.co/edit/aggee6An1iHfwsqGoE3q?p=preview" rel="noreferrer">http://plnkr.co/edit/aggee6An1iHfwsqGoE3q?p=preview</a>), but when I try to update it to beta 6 it breaks horribly (see <a href="http://plnkr.co/edit/voU933?p=preview" rel="noreferrer">http://plnkr.co/edit/voU933?p=preview</a>).</p>
  
  <p>I took a look at the commit that added built-in support for radio options (see <a href="https://github.com/angular/angular/commit/e725542" rel="noreferrer">https://github.com/angular/angular/commit/e725542</a>), which gives this example</p>
  
  <pre><code>@Component({
    template: `
      &lt;input type="radio" name="food" [(ngModel)]="foodChicken"&gt;
      &lt;input type="radio" name="food" [(ngModel)]="foodFish"&gt;
    `
  })
  class FoodCmp {
    foodChicken = new RadioButtonState(true, "chicken");
    foodFish = new RadioButtonState(false, "fish");
  }
  </code></pre>
  
  <p>but my attempts to make that work have so far ended up quite like my failed plnkr.</p>