title: clistview a path in itemView in yii
body: <p>I have a widget that renders a file. From there, it has a clistview. But the path is not working. I am getting the error <code>require(): Filename cannot be empty</code>. 
  So originally I had the page render from $model, but I realized I should be using clistview. It works fine if I just do a renderPartial $model but it doesn't work in clistview.</p>
  
  <p>from my widget:</p>
  
  <pre><code>$this-&gt;renderFile(Yii::getPathOfAlias('application.views.grid'). '/index.php', 
  array('product'=&gt;$product));
  </code></pre>
  
  <p>pass to my grid/index.php. I'm showing both ways I had. The top one works but I would need to do a foreach loop. I want to get rid of that due to pagination problems, so I want to use clistview.</p>
  
  <pre><code>&lt;?php 
  // this works fine, but not what I want.
  // $this-&gt;controller-&gt;renderPartial('//grid/_view',array(
  //      'product'=&gt;$product,
  // ))
  ?&gt;
      &lt;?php 
  //    $path = '//grid/_view'; I've tried something like this and put it in itemView. It doesn't work.
      $this-&gt;widget('zii.widgets.CListView', array(
              'dataProvider'=&gt;$product,
              'itemView'=&gt;'//grid/_view',
              'template' =&gt; '{pager}{items}',
      ); 
      ?&gt;
  </code></pre>