Sonata admin bundle, manipulate objects

Question

I have 2 entities with one to many relationship project and prototype And I\'ve been looking for a way to list the prototypes that belong to a project in the show action . here

Answer 1

I found a way to resolve the problem but still I feel it's not the better way I created a controller and overrided the showAction

redirect($this->generateUrl('admin_app_prototype_list', array(
        'filter[projet__id][value]'=>$id
    )));
    }
}

Then I get a list of prototypes that belong to a project.