/**
  * Deletes a particular model.
  * If deletion is successful, the browser will be redirected to the 'admin' page.
  * @param integer $id the ID of the model to be deleted
  */
 public function actionDelete($id)
 {
     $unit = $this->loadModel($id);
     $master_id = $unit->course_unit_master_id;
     UnitDetailTable::model()->deleteAll("unit_detail_unit_master_id = :courseId", array(':courseId' => $id));
     $unit->delete();
     $this->redirect(array('/courseMaster/view', 'id' => $master_id));
 }
 /**
  * Returns the data model based on the primary key given in the GET variable.
  * If the data model is not found, an HTTP exception will be raised.
  * @param integer the ID of the model to be loaded
  */
 public function loadModel($id)
 {
     $model = UnitDetailTable::model()->findByPk($id);
     if ($model === null) {
         throw new CHttpException(404, 'The requested page does not exist.');
     }
     return $model;
 }
 /**
  * Deletes a particular model.
  * If deletion is successful, the browser will be redirected to the 'admin' page.
  * @param integer $id the ID of the model to be deleted
  */
 public function actionDelete($id)
 {
     if (Yii::app()->request->isPostRequest) {
         // we only allow deletion via POST request
         $this->loadModel($id)->delete();
         // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
         if (!isset($_GET['ajax'])) {
             $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
         }
     } else {
         if (!Yii::app()->request->isPostRequest) {
             $stud_tran = StudentTransaction::model()->findAll(array('condition' => 'student_transaction_course_id=' . $id));
             if (!empty($stud_tran)) {
                 throw new CHttpException(400, 'You can not delete this record because it is used in another table.');
             } else {
                 $this->loadModel($id)->delete();
                 CourseUnitTable::model()->deleteAll("course_unit_master_id = :courseId", array(':courseId' => $id));
                 UnitDetailTable::model()->deleteAll("unit_detail_course_id = :courseId", array(':courseId' => $id));
                 $this->redirect(array('admin'));
             }
         } else {
             throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
         }
     }
 }