/**
* 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 = Plant::model()->findByPk((int) $id);
if ($model === null) {
throw new CHttpException(404, 'The requested page does not exist.');
}
return $model;
}