Empty variable after transfer from twigg to javascript (symfony)

Question

When I pass the variable from twig to javascript, and display it in the console it returns an empty object.

The controller that sends variable $user to twig

$user = $userRepository->findAll();
    $hall = $hallRepository->findAll();

    return $this->render('pages/leader_hall/home.html.twig', [
        'leadersHall' => $leadersHall,
        'user'=> $user,
        'hall' => $hall
    ]);

Here is the twig dump which sends me the data correctly(The data is correctly sent and completed

"user" => array:7 [▼
0 => App\Entity\User {#783 ▶}
1 => App\Entity\User {#615 ▶}
2 => App\Entity\User {#655 ▶}
3 => App\Entity\User {#392 ▶}
4 => App\Entity\User {#796 ▶}
5 => App\Entity\User {#602 ▶}
6 => App\Entity\User {#608 ▶}

]

The javascript code to retrieve the variable User

var user = JSON.parse('{{ user | json_encode| raw}}')
        console.log(user)

the returned log (an array containing an empty object)

[
{},
{},
{},
{},
{},
{},
{}

]

Thanks for your help

Answer 1

The problem is solved, it was necessary to serialize $user in the controller

$user = $userRepository->findAll();
    $hall = $hallRepository->findAll();

    $encoder = new JsonEncoder();
    $defaultContext = [
        AbstractNormalizer::CIRCULAR_REFERENCE_HANDLER => function ($object, $format, $context) {
            return $object->getName();
        },
    ];
    $normalizer = new ObjectNormalizer(null, null, null, null, null, null, $defaultContext);

    $serializer = new Serializer([$normalizer], [$encoder]);
    $userSerialze = $serializer->serialize($user, 'json');


    return $this->render('pages/leader_hall/home.html.twig', [
        'leadersHall' => $leadersHall,
        'hall' => $hall,
        'user' => $userSerialze
    ]);