Mysql 如何将文件添加到数据库my sql和symfony 5

我正在尝试将文件上载到我的表单我的上载文件有问题，出现以下错误：

SQLSTATE[23000]：完整性约束冲突：1048列 “文件名”不能为空

这是我的代码： 控制员：

/**
 * @Route("/new", name="demande_o_new", methods={"GET","POST"})
 */
public function new(Request $request): Response
{
    $demandeO = new DemandeO();
    $form = $this->createForm(DemandeOType::class, $demandeO);
    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {

        $entityManager = $this->getDoctrine()->getManager();
        $brochureFile = $form->get('brochure')->getData();
    
        // this condition is needed because the 'brochure' field is not required
        // so the PDF file must be processed only when a file is uploaded
        if ($brochureFile) {
            $originalFilename = pathinfo($brochureFile->getClientOriginalName(), PATHINFO_FILENAME);
            dd($originalFilename );
            // this is needed to safely include the file name as part of the URL
            $safeFilename = $slugger->slug($originalFilename);
            $newFilename = $safeFilename.'-'.uniqid().'.'.$brochureFile->guessExtension();

            // Move the file to the directory where brochures are stored
            try {
                $brochureFile->move(
                    $this->getParameter('brochures_directory'),
                    $newFilename
                );
            } catch (FileException $e) {
                // ... handle exception if something happens during file upload
                echo "file mat3adech";
            }

            // updates the 'brochureFilename' property to store the PDF file name
            // instead of its contents
            $demandeO->setBrochureFilename($newFilename);
        }
       
        $entityManager->persist($demandeO);
        $entityManager->flush();

        return $this->redirectToRoute('demande_o_index');
    }

    return $this->render('demande_o/new.html.twig', [
        'demande_o' => $demandeO,
        'form' => $form->createView(),
    ]);
}

需求类型：

->add('brochure', FileType::class, [
            'label' => 'Brochure (PDF file)',

            // unmapped means that this field is not associated to any entity property
            'mapped' => false,

            // make it optional so you don't have to re-upload the PDF file
            // every time you edit the Product details
            'required' =>true,

            // unmapped fields can't define their validation using annotations
            // in the associated entity, so you can use the PHP constraint classes
            'constraints' => [
                new File([
                    'maxSize' => '1M',
                    'mimeTypes' => [
                        'application/pdf',
                        'application/x-pdf',    
                    ],
                    'mimeTypesMessage' => 'Please upload a valid PDF document',
                ])
            ],
        ])

services.yaml中的配置：

brockhures\u目录：'%kernel.project\u dir%/public/uploads/brockhures'

我在公用文件夹中添加了两个文件夹 上传->小册子