/**
* @return \yii\db\ActiveQuery WorkType
*/
public function getWorkTypes()
{
return $this->hasMany(WorkType::className(), ['id' => 'work_type_id'])->viaTable('vacancy_work_type', ['vacancy_id' => 'id']);
}
/**
* return the course preferences of a student
* @return $this
*/
public function getWorkPreferences()
{
return $this->hasMany(WorkType::className(), ['id' => 'work_type_id'])->viaTable('student_work_preference', ['student_id' => 'id'])->all();
}
