public function beforeAction($action)
 {
     $request = \Yii::$app->urlManager->parseRequest(\Yii::$app->request);
     $board = Board::findOne(['name' => $request[1]['name']]);
     $thread = isset($request[1]['threadNum']) ? Thread::findOne($request[1]['threadNum']) : null;
     $ban = new Ban($board, $thread);
     return $ban->check();
 }