public function executeRemoveFilter()
 {
     $success = false;
     $message = "Error has occured !";
     if ($this->getRequest()->getMethod() == sfRequest::POST) {
         $id = $this->getRequestParameter("id");
         $obj = afSaveFilterPeer::retrieveByPk($id);
         if ($obj) {
             $obj->delete();
             $message = "Filter deleted successfully.";
         }
         $success = true;
     }
     $result = array("success" => $success, "message" => $message, "redirect" => "/user/filters");
     return $this->renderText(json_encode($result));
 }