Controller

gistfile1.txt

/**
     * Creates a new Banner entity.
     *
     * @Route("/create", name="admin_banner_create")
     * @Method("post")
     * @Template("MySomethingBundle:AdminBanner:index.html.twig")
     */
    public function createAction()
    {
        $entity  = new Banner();
        $request = $this->getRequest();

        $form    = $this->createForm(new BannerType(), $entity);
        $form->bindRequest($request);
        
        if ($form->isValid()) {
            $em = $this->getDoctrine()->getEntityManager();
            $em->persist($entity);
            $em->flush();
        }
        
        $banners = $this->getBannerList($em);
        return $this->redirect($this->generateUrl('admin_banner_list', array('big_banners' => $banners->get('bigBanners'), 'small_banners' => $banners->get('smallBanners'))));

    }