/**
  * @param bool $insert
  * @param array $changedAttributes
  */
 public function afterSave($insert, $changedAttributes)
 {
     if ($this->default == 1) {
         Languages::updateAll(['default' => 0], 'id!=' . $this->id);
     }
     Yii::$app->cache->delete('languages');
     parent::afterSave($insert, $changedAttributes);
 }