/**
  * This method accepts user id, property id and deletes the record.
  * Returns true if successfully deleted. 
  * Returns false if deletion fails.
  * 
  * @param string $propertyId
  * @param string $user_Id
  * @return true || false
  */
 public static function removeRating($propertyId, $userId)
 {
     return PropertyRating::model()->deleteAll('property_id=:propertyId AND user_id=:userId', array(':propertyId' => $propertyId, ':userId' => $userId));
 }
 /**
  * Returns the data model based on the primary key given in the GET variable.
  * If the data model is not found, an HTTP exception will be raised.
  * @param integer the ID of the model to be loaded
  */
 public function loadModel($id)
 {
     $model = PropertyRating::model()->findByPk($id);
     if ($model === null) {
         throw new CHttpException(404, 'The requested page does not exist.');
     }
     return $model;
 }