forms - Symfony2 - Set a selected value for the entity field

Question

I'm trying to set a selected value inside an entity field. In accordance with many discussions I've seen about this topic, I tried to set the data option but this doesn't select any of the values by default:

class EventType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('place', 'entity', array(
                'class' => 'RoyalMovePhotoBundle:Place',
                'property' => 'name',
                'empty_value' => "Choisissez un club",
                'mapped' => false,
                'property_path' => false,
                'data' => 2
            ))
            ->add('begin')
            ->add('end')
            ->add('title')
            ->add('description')
        ;
    }

    // ...
}

By looking for more I've found that some people had to deactivate the form mapping to the entity. That seems logical so I tried to add 'mapped' => false to the options, without success...

If it can help, here's my controller:

class EventController extends Controller
{
    // ...

    public function addAction()
    {
        $request = $this->getRequest();
        $em = $this->getDoctrine()->getManager();

        $event = new Event();
        $form = $this->createForm(new EventType(), $event);

        $formHandler = new EventHandler($form, $request, $em);

        if($formHandler->process()) {
            $this->get('session')->getFlashBag()->add('success', "L'évènement a bien été ajouté.");
            return $this->redirect($this->generateUrl('photo_event_list'));
        }

        return $this->render('RoyalMovePhotoBundle:Event:add.html.twig', array(
            'form' => $form->createView()
        ));
    }
}

And the EventHandler class:

class EventHandler extends AbstractHandler
{
    public function process()
    {
        $form = $this->form;
        $request = $this->request;

        if($request->isMethod('POST')) {
            $form->bind($request);

            if($form->isValid()) {
                $this->onSuccess($form->getData());
                return true;
            }
        }

        return false;
    }

    public function onSuccess($entity)
    {
        $em = $this->em;

        $em->persist($entity);
        $em->flush();
    }
}

I'm a bit stuck right now, is there anyone who got an idea?

Answer 1

You only need set the data of your field:

    
    class EventController extends Controller
    {
        // ...

        public function addAction()
        {
           $request = $this->getRequest();
            $em = $this->getDoctrine()->getManager();

            $event = new Event();
            $form = $this->createForm(new EventType(), $event);

            // -------------------------------------------
            // Suppose you have a place entity..
            $form->get('place')->setData($place);
            // That's all..
            // -------------------------------------------

            $formHandler = new EventHandler($form, $request, $em);

            if($formHandler->process()) {
                $this->get('session')->getFlashBag()->add('success', "L'évènement a bien été ajouté.");
                return $this->redirect($this->generateUrl('photo_event_list'));
            }

            return $this->render('RoyalMovePhotoBundle:Event:add.html.twig', array(
                'form' => $form->createView()
            ));
        }
    }