/**
  *tworzenie zamowienia
  * @param Entity\Car $car
  * @return \Symfony\Component\HttpFoundation\RedirectResponse
  */
 public function rentAction(Entity\Car $car)
 {
     $user = $this->get('security.token_storage')->getToken()->getUser();
     $order = new Entity\CarOrder();
     $order->setCar($car);
     $order->setUser($user);
     $order->setDateFrom(new \DateTime());
     $order->setDateTo((new \DateTime())->add(new \DateInterval('P1D')));
     $em = $this->getDoctrine()->getManager();
     $em->persist($order);
     $em->flush();
     return $this->redirectToRoute('app_orders');
 }