public function actionRedirect($hash)
 {
     assert('is_string($hash)');
     try {
         $url = ShortUrl::getUrlByHash($hash);
         $this->redirect($url);
     } catch (NotFoundException $exception) {
         throw new CHttpException(404, Zurmo::t('ZurmoModule', 'The specified hash cannot be found.'));
     }
 }