/**
  * Creates data provider instance with search query applied
  *
  * @param array $params        	
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = CmsDocument::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     if (!($this->load($params) && $this->validate())) {
         return $dataProvider;
     }
     $query->andFilterWhere(['id' => $this->id, 'language' => $this->language]);
     $query->andFilterWhere(['like', 'file_name', $this->file_name])->andFilterWhere(['like', 'file_path', $this->file_path])->andFilterWhere(['like', 'mime_type', $this->mime_type]);
     return $dataProvider;
 }