SonataAdminBundle - Form validation not performed when data is changed on PRE_SUBMIT or POST_SET_DATA

[ethernal]

I am trying to validate computed field that is referenced as title below. The field's content is built from parts of two other entities ([entity1]Document->getName and [entity2]DocumentRevision->getRevisionNmber).

Main issue is that although UniqeEntity constraint is used on the title field and modification is done on PRE_SUBMIT or on POST_SET_DATA (and validation should be performed on SUBMIT event SonataAdmin does not return form validation error, but tries to enter data to the database invoking DB layer error on Unique constraint.

$builder = $formMapper->getFormBuilder();
        $builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) {
            $data = $event->getData();
            $form = $event->getForm();

            if (!$data) {
                return;
            }

            $data['title'] = $data['document'] . ' wyd. ' . $data['documentRevision'];
            $event->setData($data);
        }

        );

Second issue is that I can't/dont know how to get data of related entities (to generate the title field name) as using callbacks to entity cause errors (running method on non object).

For more details please refer to this topic on stack overflow: http://stackoverflow.com/questions/25135031/symfony-2-change-entitys-field-from-admin-while-keeping-validation-using-sona

Also this issue seems to be related to #1016 about EventSubscriber.

If there is a different way to keep fields validated and make them computed at runtime please let me know I'm very eager to know of a way (with details please).

[webdevilopers]

Regarding entity data maybe this will help you to get the subject:
https://gist.github.com/webdevilopers/fef9e296e77bb879d138

Then you could use getters to get the desired data for instance:

protected function configureFormFields(FormMapper $formMapper)
{
    $subject = $this->getSubject();

    $formMapper->getFormBuilder()->addEventListener(FormEvents::PRE_SET_DATA,
        function (FormEvent $event) use ($subject) { 
            $document = $subject->getDocument();

            // ...
    });
}

[webdevilopers]

Close @ethernal ?

[ethernal]

It can be closed. I have used LifecycleCallbacks and for some reason it works :-). I am trying to do the same now for other Entity, but it's not working as expected.

PS. this should work on DB level not on Form level as I want this to functionality to work even when I'm not using form directly (or through a factory).

/**
* @ORM\PrePersist
* @ORM\PreUpdate
*/
public function setTitleFromDocumentName()
{
        $this->setTitle($this->getDocument()->getName()." rev. ". $this->getDocumentRevision()->getRevisionNumber());
}