[Serializer] Typed property Proxies\__CG__\App\Entity\Website::$ must not be accessed before initialization (in __sleep)

[allan-simon]

Symfony version(s) affected: 5.1.5

php version 7.4.3

Description

When login in my website , it produces this exception

Error:
Typed property Proxies\__CG__\App\Entity\Website::$ must not be accessed before initialization (in __sleep)

  at vendor/symfony/security-http/Firewall/ContextListener.php:178
  at serialize()
     (vendor/symfony/security-http/Firewall/ContextListener.php:178)
  at Symfony\Component\Security\Http\Firewall\ContextListener->onKernelResponse()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:230)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:59)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (vendor/symfony/http-kernel/HttpKernel.php:190)
  at Symfony\Component\HttpKernel\HttpKernel->filterResponse()
     (vendor/symfony/http-kernel/HttpKernel.php:136)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (vendor/symfony/http-kernel/HttpKernel.php:79)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (vendor/symfony/http-kernel/Kernel.php:196)
  at Symfony\Component\HttpKernel\Kernel->handle()
     (public/index.php:28)                

How to reproduce
no real idea

Possible Solution
no idea too :(

Additional context

it seems related to this PR #36332 , but unfortunately I still have this problem

[BoShurik]

Is this entities somehow related to user (UserInterface)?

[allan-simon]

yes

<?php
declare(strict_types=1);

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
 * @ORM\Entity()
 * @UniqueEntity(fields="email", message="email_already_taken")
 * @ORM\HasLifecycleCallbacks
 *
 */
class Customer implements UserInterface
{
   use HasId;
   use HasCreationAndUpdateTime;


    /**
     * @ORM\ManyToOne(targetEntity=Website::class)
     * @ORM\JoinColumn(nullable=true)
     */
    private ?Website $defaultWebsite;
}

[BoShurik]

Just implement \Serializable with only necessary fields

public function serialize()
{
    return serialize([
        $this->id,
        $this->enabled,
        $this->username,
        $this->password,
    ]);
}

public function unserialize($serialized)
{
    [
        $this->id,
        $this->enabled,
        $this->username,
        $this->password,
    ] = unserialize($serialized);
}

[allan-simon]

thanks i'm trying that right now !

[allan-simon]

I confirm it fixed the problem, thanks a lot :)