CakePHP requestAction()

Need to access a controller method from the view?

View:

$quantity = $this->requestAction(array(
 'controller' => 'articles',
 'action' => 'getRowQuantity'),
 array('id' => $current_id));

Controller:

public function getRowQuantity($id =0)
{
 $id = $this->params['id']; // remember!
 $total = $this->Article->ArticleTransaction->find('all', array(
 'fields' => array('sum(ArticleTransaction.quantity) as TOTAL'),
 'conditions' => array('ArticleTransaction.service_id' => $id)));
 $total_available = $total[0][0]['TOTAL'];
 return $total_available;
}