title: Custom values in sfWidgetFormDoctrineChoice
body: <p>I have a <em>User</em> model with <em>name</em> and <em>surname</em> columns. I'm trying to create a selector in a form using <code>sfWidgetFormDoctrineChoice</code>, which by default only display the <em>name</em> values.</p>
  
  <p>How can I modify the widget to display <em>both the name and the surname</em>? I know you can pass a query option when initializing the widget, but I cannot make it work:</p>
  
  <pre><code>$this-&gt;setWidget('user_id', new sfWidgetFormDoctrineChoice(array(
      'model' =&gt; $this-&gt;getRelatedModelName('User'),
      'query' =&gt; Doctrine_Query::create()-&gt;select('u.name, u.surname')-&gt;from('User u'),
      'add_empty' =&gt; false)
  ));
  </code></pre>
  
  <p>Thanks!</p>