title: ngModel cannot be used to register form controls with a parent formGroup directive
body: <p>After upgrading to RC5 we began getting this error:</p>
  <pre><code>ngModel cannot be used to register form controls with a parent formGroup 
   directive.
  Try using formGroup's partner directive &quot;formControlName&quot; instead.  Example:
  
      &lt;div [formGroup]=&quot;myGroup&quot;&gt;
        &lt;input formControlName=&quot;firstName&quot;&gt;
      &lt;/div&gt;
  
      In your class:
  
      this.myGroup = new FormGroup({
         firstName: new FormControl()
      });
  
        Or, if you'd like to avoid registering this form control,
   indicate that it's standalone in ngModelOptions:
  
        Example:
  
        
    &lt;div [formGroup]=&quot;myGroup&quot;&gt;
       &lt;input formControlName=&quot;firstName&quot;&gt;
       &lt;input [(ngModel)]=&quot;showMoreControls&quot; [ngModelOptions]=&quot;{standalone: true}&quot;&gt;
    &lt;/div&gt;
  </code></pre>
  <p>It looks like in RC5 the two can no longer be used together, but I could not find an alternative solution.</p>
  <p>Here is the component producing the exception:</p>
  <pre class="lang-html prettyprint-override"><code>    &lt;select class=&quot;field form-control&quot; [formGroup]=&quot;form&quot; [(ngModel)]=&quot;cause.id&quot; [name]=&quot;name&quot;&gt;
      &lt;option *ngFor=&quot;let c of causes&quot; [value]=&quot;c.text&quot;&gt;{{c.text}}&lt;/option&gt;
      &lt;/select&gt;
  </code></pre>