/**
  * Lists all Term models.
  * @return mixed
  */
 public function actionIndex()
 {
     // Store the active taxonomy-id in a session var if it is provided through the url
     if (Yii::$app->request->get('taxonomy-id') != null) {
         Yii::$app->session->set('taxonomy.taxonomy-id', Yii::$app->request->get('taxonomy-id'));
     }
     return $this->render('index', ['tree' => Term::find()->tree(Yii::$app->session->get('taxonomy.taxonomy-id'))]);
 }
 /**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = Term::find()->joinWith('translations')->roots();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     if (!($this->load($params) && $this->validate())) {
         return $dataProvider;
     }
     $query->andFilterWhere(['name' => $this->name]);
     return $dataProvider;
 }