edit and save example

IssueController.php

<?php

/**
 * Edit an Issue entity.
 *
 * @Route("/edit/{id}", requirements={"id" = "\d+"}, defaults={"id" = 0}, options={"expose": true}, name="issue_edit")
 * @ParamConverter("issue", class="AppBundle\Entity\Issue", options={"id"="id"})
 * @Template()
 * @Method({"GET"})
 */
public function editAction(Request $request, Issue $issue)
{
    $categories = $this->getDoctrine()->getRepository('AppBundle:Category')->findAll();
    $colors = $this->getDoctrine()->getRepository('AppBundle:Color')->findAll();

    return [
        'initData' => [
            'colors' => $colors,
            'categories' => $categories,
            'issue' => $issue
        ],
        'issue' => $issue
    ];
}


/**
 * Save an issue
 *
 * @Route("/save/{id}", requirements={"id" = "\d+"}, options={"expose": true}, name="issue_save")
 * @ParamConverter("issue", class="AppBundle\Entity\Issue", options={"id"="id"})
 * @Template()
 * @Method({"POST"})
 */
public function saveAction(Request $request, Issue $issue)
{
    $editForm = $this->createForm(IssueType::class, $issue);
    $this->handleJsonForm($editForm, $request);
    $this->getDoctrine()->getManager()->flush();

    return new JsonResponse([
        'issue' => $issue
    ]);
}