CODEWITHSUNDEEP
formssymfonysymfony-2.3
maphe
maphe

Reputation: 1931

Symfony2 Form - Event listener on Embed Form

Starting from the example in the symfony cookbook about dynamic form generation (link to doc)

class SportMeetupType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('sport', 'entity', array(...))
        ;

        $builder->addEventListener(
            FormEvents::PRE_SET_DATA,
            function(FormEvent $event) {
                $form = $event->getForm();

                // this would be your entity, i.e. SportMeetup
                $data = $event->getData();

                $positions = $data->getSport()->getAvailablePositions();

                $form->add('position', 'entity', array('choices' => $positions));
            }
        );
    }
}

I reproduced this code with a difference, I embed this form in a parent form (called for the exemple SportPlayerType).

SportPlayerType is mapped on entity SportPlayer which contains a couple of attributes : $name and $meetup, a string and a SportMeetup.

My problem is in the lambda function, parameter of the addEventListener :

As a result, $form->add('position') throw an error because the FormBuilder cannot match position field on entity SportPlayer.

How could I force matching between SportMeetupType and entity SportMeetup when SportMeetupType in an embed form?

Upvotes: 0

Views: 1864

Answers (1)

Nicolai Fröhlich
Nicolai Fröhlich

Reputation: 52483

We'll there is a reason the event is called PRE_SET_DATA ...

Namely the event gets fired before the submitted data is set.

Therefore you can't access ...

$event->getData()->getSport();

... in the listener as long as you don't provide a new Sport() object or an existing entity when creating the form i.e. in a controller like this:

$entity = new Sport(); // ... or get the entity from db
$form = $this->createForm(new SportMeetupType(), $entity);

Just use the POST_SET_DATA event and the data will be available.

Upvotes: 1

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