title: Yii URLManager rule for multiple controller action parameters
body: <p>I'm desiring to use this url:</p>
  
  <pre><code>index.php/form/2/fields/all
  </code></pre>
  
  <p>To output a list of fields with the same form id. Currently, I have a Form crud and a Fields crud. </p>
  
  <p><strong>FieldsController.php</strong></p>
  
  <pre><code>public function actionAll()
  {
    if (isset($_GET['form']))
    {
      $form_id = $_GET['form'];
      $model=$this-&gt;model()-&gt;findAllByAttributes(array('FORM_ID'=&gt;$form_id), 'order'=&gt; 'POSITION DESC');
      $this-&gt;render('all', array('model' =&gt; $model));
    }
    else
    {
      $this-&gt;render('error');
    }
  }
  </code></pre>
  
  <p>What would the URLManager rule be?</p>