public function actionAddData()
 {
     $model = new PenyakitGejala();
     if ($model->load(Yii::$app->request->post())) {
         Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
         $model->created_by = Yii::$app->user->id;
         $model->created_date = date('Y-m-d H:i:s');
         if ($model->save()) {
             $res = array('message' => 'Data Berhasil Di Simpan.', 'alert' => 'success', 'proses' => 'save', 'success' => true);
         } else {
             $res = array('message' => 'Data Gagal Di Simpan.', 'alert' => 'error', 'proses' => 'save', 'success' => false);
         }
         return $res;
         \Yii::$app->end();
     } else {
         return $this->renderAjax('create', ['model' => $model]);
     }
 }