Yii # actionBatchUpdate method

Yii # actionBatchUpdate method.php

public function actionBatchUpdate()
{
    // retrieve items to be updated in a batch mode
    // assuming each item is of model class 'Item'
    $items=$this->getItemsToUpdate();
    if(isset($_POST['Item']))
    {
        $valid=true;
        foreach($items as $i=>$item)
        {
            if(isset($_POST['Item'][$i]))
                $item->attributes=$_POST['Item'][$i];
            $valid=$item->validate() && $valid;
        }
        if($valid)  // all items are valid
            // ...do something here
    }
    // displays the view to collect tabular input
    $this->render('batchUpdate',array('items'=>$items));
}