/**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = Contact_category::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     if (!($this->load($params) && $this->validate())) {
         return $dataProvider;
     }
     $query->andFilterWhere(['id' => $this->id]);
     $query->andFilterWhere(['like', 'name', $this->name]);
     return $dataProvider;
 }
 /**
  * @return an array with id and name of categories 
  */
 public static function getContact_category()
 {
     $queryCategory = Contact_category::find()->asArray()->all();
     $arrayCategory = ArrayHelper::map($queryCategory, 'id', 'name');
     return $arrayCategory;
 }