public function deleteAction($request, $db)
 {
     if (!isset($request->user_id)) {
         throw new Exception("You must be logged in to delete data", 400);
     }
     if (isset($request->url_elements[4])) {
         switch ($request->url_elements[4]) {
             case 'attending':
                 $event_id = $this->getItemId($request);
                 $event_mapper = new EventMapper($db, $request);
                 $event_mapper->setUserNonAttendance($event_id, $request->user_id);
                 header("Location: " . $request->base . $request->path_info, null, 200);
                 return;
                 break;
             default:
                 throw new Exception("Operation not supported, sorry", 404);
         }
     } else {
         throw new Exception("Operation not supported, sorry", 404);
     }
 }