public function editAction()
{
    // Create the form.
    $form = new JobForm();

    // Get post ID.
    $jobId = $this->params()->fromRoute('id', -1);

    // Find existing job in the database.
    $jobs = $this->entityManager->getRepository(Jobs::class)
        ->findOneById($jobId);
    if ($jobs == null) {
        $this->getResponse()->setStatusCode(404);
        return;
    }

    // Check whether this job is a POST request.
    if ($this->getRequest()->isPost()) {

        // Get POST data.
        $data = $this->params()->fromPost();

        // Fill form with data.
        $form->setData($data);
        if ($form->isValid()) {

            // Get validated form data.
            $data = $form->getData();

            // Use job manager service to add new post to database.
            $this->jobManager->updateJob( $jobs, $data);

            // Redirect the user to "backups" page.
            return $this->redirect()->toRoute('backups');
        }
    } else {...}