Doctrine data storage sample for FormFlow https://github.com/symfony/symfony/pull/60212

DoctrineDataStorage.php

<?php

namespace App\Form\Data\Storage;

use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Form\Flow\DataStorage\DataStorageInterface;

class DoctrineDataStorage implements DataStorageInterface
{
    public function __construct(
        private readonly EntityManagerInterface $em,
    ) {
    }

    public function save(object|array $data): void
    {
        $this->em->persist($data); // it does nothing if the entity is already persisted
        $this->em->flush();
    }

    public function load(object|array|null $default = null): object|array|null
    {
        if (!\is_object($default) || !$this->em->contains($default)) {
            return $default;
        }

        $this->em->initializeObject($default);

        return $default;
    }

    public function clear(): void
    {
        $this->em->flush();
    }
}