Symfony2 Form Event PreSetData Subscriber

Question

In my application, the user can create custom fields for some objects, and then set values ​​for these custom fields for each entity object when the form is displayed.

The implementation is as follows:

1º) I created an interface for the forms and forms that I want to implement in this interface.

2º) I created a form extension for all forms:

app_core_form_builder.form_extension:
        class: App\Core\Bundle\FormBuilderBundle\Form\FormExtension
        arguments: ["@service_container", "@doctrine.orm.entity_manager"]
        tags:
            - { name: form.type_extension, alias: form }

3º) In this extension, if the form implements the interface specified in step 1, I add EventSubscriber:

if($formType instanceof \App\Core\Bundle\FormBuilderBundle\Model\IAllowCustomFieldsdInterface){
             $builder->addEventSubscriber(new FormSubscriber($this->container, $this->em));    
}

4º) preSetData FormEvent. Entity, , . Symfony2. , , . , , , , .

public function preSetData(FormEvent $event) {

        $data = $event->getData();
        $form = $event->getForm();


        // During form creation setData() is called with null as an argument
        // by the FormBuilder constructor. You're only concerned with when
        // setData is called with an actual Entity object in it (whether new
        // or fetched with Doctrine). This if statement lets you skip right
        // over the null condition.
        if (null === $data) {
            return;
        }

        $formEntity = $form->getConfig()->getType()->getInnerType()->getEntity();

        $DbEntity = $this->em->getRepository('AppCoreSchemaBundle:DbEntity')->findOneBy(array('id' => $formEntity));

        if ($DbEntity && $DbEntity->getAllowCustomFields()) {

            $organization = $this->container->get('app_user.user_manager')->getCurrentOrganization();

            if (!$organization) {
                throw $this->createNotFoundException('Unable to find Organization entity.');
            }

            $params = array(
                'organization' => $organization,
                'entity' => $DbEntity,
            );

            $entities = $this->em->getRepository('AppCoreSchemaBundle:DbCustomField')->getAll($params);


            # RUN BY ALL CUSTOM FIELDS AND ADD APPROPRIATE FIELD TYPES AND VALIDATORS
            foreach ($entities as $customField) {
                # configurate customfield

                FieldConfiguration::configurate($customField, $form);
                # THE PROBLEM IS HERE
                # IF OBJECT IS NOT NULL THEN MAKE SET DATA FOR APPROPRIATED FIELD
                if ($data->getId()) {

                    $filters = array(
                        'custom_field' => $customField,
                        'object' => $data->getId(),
                    );

                    $DbCustomFieldValue = $this->em->getRepository('UebCoreSchemaBundle:DbCustomFieldValue')->getFieldValue($filters);
                if ($DbCustomFieldValue) {
                    $form[$customField->getFieldAlias()]->setData($DbCustomFieldValue->getValue());
                } else {
                    $form[$customField->getFieldAlias()]->setData(array());
                }
                }
            }
        }
    }

, . , , " " .

, , , $form [field_alias '] → setData (, , Array).

, . , .

- , ? preSetData?

EDITED

Entity DbCustomField :

/**
     * @var string
     *
     * @ORM\Column(name="value", type="array", nullable=true)
     */
    protected $value;

`

var_dump($DbCustomFieldValue) → (Ueb\Core\Bundle\SchemaBundle\Entity\DbCustomFieldValue)

var_dump(DbCustomFieldValue->getValue())

- > string (11) "bruno valor"

- :

var_dump($customField->getFieldAlias());= (21) "testebruno-1383147874"

$form[$customField->getFieldAlias()]->setData('example1'); .

, :

$form['testebruno-1383147874']->setData('example2');

- >

?

Answer 1

metalvarez , postSetData preSetData one:

public function postSetData(FormEvent $event) {
    // ...
}

preSetData , Symfony2 , , postSetData.