yii criteria with join

Order with other table

<?php 

   $dataProvider=new CActiveDataProvider('WatchList', array(

  'criteria'=>array(
  'condition'=>'t.watch_by=:id',
  'params'=>array(':id'=>$model->id), 
  'order'=>'us.name ASC',
  'join' => 'LEFT JOIN user us on us.id = t.watch_to',

  ), 
  'pagination'=>array(
  'pageSize'=>50,
  ),
  ));  

  $this->renderPartial('WatchList', array('dataProvider'=>$dataProvider)); ?>

WatchList.php page
  

<?php 


$this->widget('zii.widgets.grid.CGridView', array(
  'id'=>'watch-list-grid',
  'dataProvider'=>$dataProvider,


  'columns'=>array(
  array(
  'name'  => 'WatchTo.name', // WatchTo relation name
  'value' => 'CHtml::link($data->WatchTo->name,Yii::app()->createUrl("site/taskview",array("id"=>$data->watch_to)))',
  'type'  => 'raw',
  ),

 array(
  'class'=>'CButtonColumn',
  'template'=>'{delete}',
  ),
  ),
  )); ?>