show a list of users in symfony - php

Question

in my symfony project i have a function that shows a list of users based on their "roles"
here's the controller code
/**
* #Route("/admin", name="admin_index", methods={"GET"})
*/
public function index(): Response
{
$Admins=$this->getDoctrine()->getRepository(User::class)->findBy(['roles' => array('["ROLE_ADMIN"]')]);
return $this->render('back/admin/index.html.twig', [
'admins' => $Admins,
]);
}
and here's the render
<table class="table" >
<thead>
<tr>
<th>Id</th>
<th>Nom</th>
<th>Email</th>
<th>Tel</th>
<th>Photo</th>
</tr>
</thead>
<tbody>
{% for admin in admins %}
<tr name="elements" id="{{ 'admin'~ admin.id}}">
<td>{{ admin.id }}</td>
<td>{{ admin.nom }}</td>
<td>{{ admin.email }}</td>
<td>{{ admin.tel }}</td>
<td>{{ admin.photo }}</td>
<td>
</td>
</tr>
{% else %}
<tr>
<td colspan="10">Rien a afficher</td>
</tr>
{% endfor %}
</tbody>
</table>
the problem here is that he's not showing anything even if the database is fulll
here's the entity declaration
/**
* #var string
*
* #ORM\Column(name="roles", type="json")
* #Groups ("post:read")
*/
private $roles;
and here's a screenshot of table structure
enter image description here
i'm really stuck since the morning and i cant figure out why

Answer 1

Since the roles field is json, your findBy won't work that way.
You should create a function in your UserRepository.php class to select users by their roles using QueryBuilder
public function findByRole($role)
{
return $this->createQueryBuilder('u')
->andWhere('u.roles LIKE :role')
->setParameter('role', "%{$role}%")
->getQuery()
->getResult();
}
you can then call that function from your controller
$admins = $this->getDoctrine()->getRepository(User::class)->findByRole("ROLE_ADMIN");
I also suggest you utilize var_dump($admins); in your controller to see if Doctrine is returning anything to you in the first place.
You can even dump variables in twig {{ dump(admins) }}