/**
  * Mark the given team as being not any longer part of the given race.
  *
  * @Route("/race/{race}/deregister/{team}", name="registration_delete")
  * @Method("POST")
  * @Security("has_role('ROLE_REGISTRATION')")
  */
 public function deleteAction(Team $team, Race $race)
 {
     // sanity check
     $races = array();
     /** @var \AppBundle\Entity\Registration $registration */
     foreach ($team->getRegistrations() as $registration) {
         array_push($races, $registration->getSection()->getRace());
     }
     if (!in_array($race, $races)) {
         $this->addFlash('error', 'Falsche Inputdaten!');
     } else {
         /** @var \AppBundle\Entity\Registration $myRegistrationForThisRace */
         $myRegistrationForThisRace = null;
         // find the "lane"
         foreach ($team->getRegistrations() as $registration) {
             if ($registration->getSection()->getRace() == $race) {
                 $myRegistrationForThisRace = $registration;
             }
         }
         if (is_null($myRegistrationForThisRace)) {
             $this->addFlash('error', 'Falsche Inputdaten! Konnte Startbahn nicht ermitteln...');
         } else {
             // mark the "lane" of the section as cancelled
             $myRegistrationForThisRace->setDeregistered();
             $this->getDoctrine()->getManager()->flush();
             $this->addFlash('notice', 'Mannschaft abgemeldet!');
         }
     }
     return $this->redirectToRoute('race_show', array('event' => $race->getEvent()->getId(), 'race' => $race->getId()));
 }