NewAction

ModelController

/**
     * @Route("/{room}/new", name="model_new")
     * @Template()
     */
    public function newAction(Request $request,$room)
    {
        $form = $this->createForm(new RoomModelType(), new RoomModel());

        if($request->isMethod('POST'))
        {
              // ulozeni do DB
        }
        return array(
            'form' => $form->createView()
        ,   'url' => $this->generateUrl('model_new',array('room' => $room))
        );
    }