/**
  * 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)
 {
     $model = Manifacturer::model()->findByPk($id);
     if ($model === null) {
         throw new CHttpException(404, 'The requested page does not exist.');
     }
     return $model;
 }
 /**
  * Helper method used in update, create and andmin actions for 
  * extracting select boxes data for manifacturer, category and measure.
  *
  * @return array
  */
 private function getNeededDataLists()
 {
     return array('manifacturers' => Manifacturer::model()->listData, 'categories' => Category::model()->listData, 'measures' => Measure::model()->listData);
 }