/**
  * Returns ActiveDataProvider for admin grid of posts
  * @param array $params
  *
  * @return \yii\data\ActiveDataProvider
  */
 public function search($params)
 {
     /* @var $query \yii\db\ActiveQuery */
     $dataProvider = new ActiveDataProvider(['query' => $query = static::find(), 'pagination' => ['pageSize' => 20]]);
     if (!$this->load($params)) {
         return $dataProvider;
     }
     $query->andFilterWhere(['id' => $this->id]);
     $translation = new PostTranslation();
     if (!$translation->load($params)) {
         return $dataProvider;
     }
     $query->andFilterWhere(['like', 'defaultTranslation.title', $this->title]);
     return $dataProvider;
 }