/**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = LearningArea::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     $this->load($params);
     if (!$this->validate()) {
         // uncomment the following line if you do not want to return any records when validation fails
         // $query->where('0=1');
         return $dataProvider;
     }
     $query->andFilterWhere(['id' => $this->id, 'grade_level_id' => $this->grade_level_id, 'subject_id' => $this->subject_id, 'sequence' => $this->sequence, 'semester' => $this->semester, 'revision' => $this->revision]);
     return $dataProvider;
 }
 public function actionLists($id)
 {
     $subjects = LearningArea::find()->where(['grade_level_id' => $id])->orderBy('sequence', SORT_ASC)->all();
     $count = count($subjects);
     if ($subjects > 0) {
         for ($x = 0; $x < $count; $x++) {
             //$name = Subject::find()->where(['id' => $subject->id])->all();
             echo "<option value='" . $subjects[$x]['subject_id'] . "'>" . $subjects[$x]->subject->subject_name . "</option>";
         }
     } else {
         echo "<option></option>";
     }
 }