public function search($params)
 {
     $query = ServiceProduct::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     if (!($this->load($params) && $this->validate())) {
         return $dataProvider;
     }
     $query->andFilterWhere(['id' => $this->id, 'product_id' => $this->product_id, 'service_id' => $this->service_id]);
     return $dataProvider;
 }