ExtraDataBundle/EventListener/SonataAdminConfigureListener.php

<?php

namespace ExtraDataBundle\EventListener;

use Sonata\AdminBundle\Event\ConfigureEvent;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;
use Symfony\Component\Translation\TranslatorInterface;

class SonataAdminConfigureListener
{

    /**
     * @var TranslatorInterface
     */
    private $translator;

    
    /**
     * @param TranslatorInterface $translator
     */
    public function __construct(TranslatorInterface $translator)
    {
        $this->translator = $translator;
    }

    /**
     * @param ConfigureEvent $event
     */
    public function addOptions(ConfigureEvent $event)
    {
        if ($event->getMapper()->has('extraData')) {
            $translation_domain = 'ExtraDataBundle';
            $formMapper = $event->getMapper();
            $formMapper->add('extraData', TextareaType::class, array(
                'required' => false,
                'help' => $this->translator->trans('help.json_format', array(), $translation_domain),
            ), array(
                'translation_domain' => $translation_domain,
            ));
        }
    }

    /**
     * @param ConfigureEvent $event
     */
    public function addTemplate(ConfigureEvent $event)
    {
        if ($event->getMapper()->has('extraData')) {
            $extraData = $event->getMapper()->get('extraData');
            $extraData->setTemplate('ExtraDataBundle:CRUD:extra_data_field.html.twig');
            $extraData->setOption('data', $event->getType());
            $extraData->setOption('translation_domain', 'ExtraDataBundle');
        }
    }

}