Symfony 2 - Change entity's field from Admin while keeping validation using SonataAdminBundle

Question

Using: Symfony 2.5 SonataAdminBundle

I am trying to change one of the entity fields (title) when data is submitted / saved to database by using two fields from associated entites ex.

DocumentRevision <- Document -> CustomEntity [title] = Document[title]+DocumentRevision[number]

But title of CustomEntity has to be unique - this was the problem I was trying to solve and managed with Database constraints and UniqueEntity validation (not quite - more on this later).

Now the issue is that I change the title data on Doctrine preUpdate/Persist effectivly skipping validation for that field since it's empty at validation time. When user puts wrong data Database layer throws an error about duplicate for unique constraint.

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

The entity itself is using UniqueEntity constraint on field title, so custom constraints or validation groups are pointles from my perspective as it would only duplicate the already used constraint.

/**
 * @UniqueEntity(
 *      fields={"title"}
 * )
**/

The simplest solution as it seems would be to get somewhere between post Submit before validation, but it would have to be done from Entity.

My question is how can (can it?) be done without overriding SonataCRUD Controller or it's other parts, is it even possible?

It can be done, but there are issues:

I was able to change the title using Form Events like this:

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

        if (!$data) {
            return;
        }

        $data['title'] = $data['document'] . ' rev. ' . $data['documentRevision'];
        $event->setData($data);
    }
...
formMapper
        ->add('title',null,array(
...
);

The current problem is that I am getting the IDs of 'document' and 'documentRevision' and I need their names or __toString() representation at least.

Another issue is that although I can set the title using the event it shows error from DB when it should show Form error since validation should be done on FormEvents::SUBMIT - this one I don't understand.

Last thing to note is that if I try to use callback function:

$builder->addEventListener(FormEvents::PRE_SUBMIT, array($this,'onPreSubmit'))

public function onPreSubmit() {
    $entity = $this->getSubject();
    $entity->setTitleFromDocumentName();
}

I will get null title and errors if Entity tries to get fields from related entites - Calling function on non object.

webDEVILopers webDEVILopers · Accepted Answer · 2015-03-24T10:08:48

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();

            // ...
    });
}

I also posted this on your issue: https://github.com/sonata-project/SonataAdminBundle/issues/2273

Symfony 2 - Change entity's field from Admin while keeping validation using SonataAdminBundle

2 Answers