code: public function createAction()
      {
          $group = new Group();
  
          $form = $this->createForm(GroupType::class, $group);
          $form->bindRequest($this->getRequest());
  
          if ($form->isValid()) {
              $em = $this->getDoctrine()->getEntityManager();
              $em->persist($group);
              $em->flush();
  
              $this->get('session')->getFlashBag()->set('success', 'The group has been created.');
  
              return $this->redirect($this->generateUrl('orkestra_group_show', array('id' => $group->getId())));
  
          }
  
          return array(
              'group' => $group,
              'form' => $form->createView()
          );
      }
docs: Creates a new Group entity.
  
  @Route("/create", name="orkestra_group_create")
  @Method("post")
  @Template("OrkestraApplicationBundle:Group:new.html.twig")
  @Secure(roles="ROLE_GROUP_WRITE")