Instanciate entity managers

Entity manager factory

Entity manager factory is a service that lets you get an entity manager :

use Small\SwooleEntityManagerBundle\Contract\EntityManagerFactoryInterface;
use App\EntityManager\UserManager;

$userManager = $container->get(EntityManagerFactoryInterface::class)
  ->get(UserManager::class);

You can inject in an existing service or use it in a controller :

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpKernel\Attribute\AsController;
use Symfony\Component\Routing\Attribute\Route;
use Small\SwooleEntityManagerBundle\Contract\EntityManagerFactoryInterface;
use App\EntityManager\UserManager;

#[AsController]
class UserController extends AbstractController
{

    #[Route('/api/get-user/{userId}', 'get_user_by_id', methods: ['GET'])]
    public function getUserById($userId): JsonResponse
    {

        /** @var \App\Entity\User $user */
        $user = $this->get(EntityManagerFactoryInterface::class)
            ->get(UserManager::class)
            ->findOneBy(['id' => $userId])
        ;

        return new JsonResponse($user->toArray());

    }
}

Next chapter : Connection factory