public function actionDeleteSample()
 {
     if (isset($_POST['ds_id'])) {
         $transaction = Yii::app()->db->beginTransaction();
         try {
             $ds = DatasetSample::model()->findByPk($_POST['ds_id']);
             if ($ds->delete()) {
                 $transaction->commit();
                 Util::returnJSON(array("success" => true));
             }
         } catch (Exception $e) {
             $message = $e->getMessage();
             Yii::log(print_r($message, true), 'error');
             $transaction->rollback();
             Util::returnJSON(array("success" => false, "message" => Yii::t("app", "Delete Error.")));
         }
         Util::returnJSON(array("success" => false, "message" => Yii::t("app", "Delete Error.")));
     }
 }
 public function actionSampleManagement()
 {
     if (!isset($_GET['id'])) {
         $this->redirect("/user/view_profile");
     } else {
         $dataset = Dataset::model()->findByPk($_GET['id']);
         if (!$dataset) {
             $this->redirect("/user/view_profile");
         }
         if ($dataset->submitter_id != Yii::app()->user->id) {
             Yii::app()->user->setFlash('keyword', "You are not the owner of dataset");
             $this->redirect("/user/view_profile");
         }
         $dss = DatasetSample::model()->findAllByAttributes(array('dataset_id' => $dataset->id), array('order' => 'sample_id asc'));
         $this->render('sampleManagement', array('model' => $dataset, 'dss' => $dss));
     }
 }