为什么user_id列为NULL？

Question

Im trying to create relation between Products And Users. One User has many Products and Many Products => 1 User. The problem is when i add the form to the table "products" column user_id = NULL.

Here is my relation in Product Entity:

 /**
 * @ORM\ManyToOne(targetEntity="AppBundle\Entity\User", inversedBy="products")
 * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
 */
private $user;

And User Entity:

 /**
 * @ORM\OneToMany(targetEntity="AppBundle\Entity\Product", mappedBy="user")
 */
private $products;

Why the column user_id is always null? Here is the code used to persists products.

/**
 * @Route("/products/add", name="create_products")
 * @Security("has_role('ROLE_USER') or has_role('ROLE_EDITOR') or has_role('ROLE_ADMIN')")
 * @param Request $request
 * @return \Symfony\Component\HttpFoundation\Response
 */
public function createProductAction(Request $request)
{
    $product = new Product();

    $form = $this->createForm(ProductType::class, $product);

    $form->handleRequest($request);

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

        /** @var UploadedFile $file */
        $file = $product->getImageForm();

            $filename = md5($product->getName());

            $file->move(
                $this->get('kernel')->getRootDir() . '/../web/images/products/',
                $filename
            );


            $product->setImage($filename);

        $em = $this->getDoctrine()->getManager();
        $em->persist($product);
        $em->flush();

        $this->redirectToRoute('products');

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

    return $this->render('products/create.product.html.twig', array(
        'productForm' => $form->createView()
    ));
}

Answer 1

You haven't used your setter in your Product object to set your user in your controller. That is the problem.

You would need to use the setter like so:

$product->setImage($filename);
$product->setUser( $user );


$em = $this->getDoctrine()->getManager();
$em->persist($product);

The above presumes you have a setter called setUser . You also need to create the user or determine the user.

Answer 2

You are persisting a product without a user. You should do something like this:

$product = new Product();
$product->setImage($filename);
$em = $this->getDoctrine()->getManager();

// here you associate the user
$user = $em->find('\AppBundle\Entity\User', 3); // user with id 3
$product->setUser($user);

$em->persist($product);
$em->flush();