public function actionNo($id)
 {
     if (!Answers::find()->where(['user_id' => Yii::$app->user->getId(), 'question_id' => (int) $id])->count()) {
         $query = Questions::updateAllCounters(['answer_no' => 1], 'id = ' . (int) $id);
         $query = Yii::$app->db->createCommand()->insert('answers', ['question_id' => (int) $id, 'user_id' => Yii::$app->user->getId(), 'answer' => 0])->execute();
     }
     return $this->redirect(['index']);
 }