无法猜测如何从参数bookpermit的请求信息中获取Doctrine实例

use Symfony\Component\HttpFoundation\Request;
use Doctrine\ORM\EntityManagerInterface;

class BookController extends AbstractController
{
    private $entityManager;

    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
    }

    public function getBookPermit(Request $request)
    {
        $bookpermit = $request->query->get('bookpermit'); // 获取GET请求参数
        // 或者使用 $request->request->get('bookpermit'); 获取POST请求参数

        if (!$bookpermit) {
            throw new \InvalidArgumentException('Missing bookpermit parameter');
        }

        // 使用Doctrine进行数据库操作
        $book = $this->entityManager->getRepository(Book::class)->findOneBy(['permit' => $bookpermit]);

        if (!$book) {
            throw $this->createNotFoundException('Book not found');
        }

        return $this->render('book/show.html.twig', ['book' => $book]);
    }
}

# config/routes.yaml
book_show:
    path: /book/{bookpermit}
    controller: App\Controller\BookController::getBookPermit
    methods: [GET]