Zend Framework, run query without a view

public function archiveNewsAction()
{

	//die(var_dump($this->_request->getParam('news_id')));
	$oNews = new news();
	$this->_request->getParam('news_id');
	$oNews->archiveNewsArticle($news_id);
	//die(var_dump($oNews));
	$this->_redirect('/admin/list-all');
}

public function archiveNewsArticle($news_id)
{
	//die($news_id);
	$db = Zend_Registry::get('db');
	$sql = "UPDATE $this->_name SET live = '0' WHERE news_id = '$news_id' LIMIT 1";
	die($sql);
	$query = $db->query($sql);
	$row = $query->fetch();

	return $row;
}

// Disable the main layout renderer
$this->_helper->layout->disableLayout();
// Do not even attempt to render a view
$this->_helper->viewRenderer->setNoRender(true);

// code in your controller
$this->_helper->viewRenderer->setNoRender(true);
// the rest of the controller

$this->_redirect()

$this->_helper->viewRenderer->setNoRender();

$this->_helper->layout->disableLayout();

$this->_redirect();