public function editAction(Request $request, $series)
    {
        $series = $this->get('oktolab_media')->getSeries($series);
        $form = $this->createForm(SeriesType::class, $series);
        $form->add('submit', SubmitType::class, ['label' => 'oktolab_media.edit_series_button', 'attr' => ['class' => 'btn btn-primary']]);
        $form->add('delete', SubmitType::class, ['label' => 'oktolab_media.delete_series_button', 'attr' => ['class' => 'btn btn-danger']]);

        if ($request->getMethod() == "POST") { //sends form
            $form->handleRequest($request);
            $em = $this->getDoctrine()->getManager();
            if ($form->isValid() || $form->get('delete')->isClicked()) { //form is valid, save or preview
                if ($form->get('submit')->isClicked()) { //save me
                    $em->persist($series);
                    $em->flush();
                    $this->get('session')->getFlashBag()->add('success', 'oktolab_media.success_edit_series');
                    return $this->redirect($this->generateUrl('oktolab_series_show', ['series' => $series->getUniqID()]));
                } elseif ($form->get('delete')->isClicked()) {
                    $this->get('oktolab_media_helper')->deleteSeries($series);
                    $this->get('session')->getFlashBag()->add('success', 'oktolab_media.success_delete_series');
                    return $this->redirect($this->generateUrl('oktolab_series'));
                } else { //???
                    $this->get('session')->getFlashBag()->add('success', 'oktolab_media.unknown_action_series');
                    return $this->redirect($this->generateUrl('oktolab_series_show', ['series' => $series->getUniqID()]));
                }
            }
            $this->get('session')->getFlashBag()->add('error', 'oktolab_media.error_edit_series');
        }

        return ['form' => $form->createView()];
    }