ngModel cannot be used to register form controls with a parent formGroup directive
<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>