Easyadminbundle: This value must be of type array | IteratorAggregate.

[SirMishaa]

Describe the bug
Hello,
My User entity contains several properties including a string type email.

However, when I modify a user, I get an error message that says that the type must be Array | IteratorAggregate.

Is this a problem with my entity or rather an EasyAdmin type problem?
I searched quite a bit on the internet but I couldn't find any solution, I don't understand the origin of this behaviour.

Precision: I let EasyAdmin manage the type, I don't have a custom type for the User entity.

To Reproduce

• easyadmin-bundle ^2.3

(OPTIONAL) Additional context

App\User.php :

<?php

namespace App\Entity;

use App\Repository\UserRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Security\Core\User\UserInterface;

/**
 * @ORM\Entity(repositoryClass=UserRepository::class)
 * @UniqueEntity("mail")
 * @UniqueEntity("psn")
 * @ORM\Table(name="`user`")
 */
class User implements UserInterface
{
     /**
     * @ORM\Column(type="string", length=255, unique=true)
     * @Assert\Unique
     * @Assert\Email
     * @Assert\NotBlank
     */
    private $mail;
    // ...
    /**
     * A visual identifier that represents this user.
     *
     * @see UserInterface
     */
    public function getUsername(): string
    {
        return (string) $this->mail;
    }

    public function getMail(): ?string
    {
        return $this->mail;
    }

    public function setMail(string $mail): self
    {
        $this->mail = $mail;

        return $this;
    }


    public function __toString(): string
    {
        return (string) $this->mail;
    }

}

[javiereguiluz]

Your email property looks correct ... so I can't understand how this can fail ... and why that specific error shows. It dones't make sense to me 😐

[rogergerecke]

test remove the
* @Assert\Unique * @Assert\Email * @Assert\NotBlank
works ???

[SirMishaa]

test remove the
* @Assert\Unique * @Assert\Email * @Assert\NotBlank
works ???

Indeed, this is working again !
It was a problem of my entity, not EasyAdmin, I'm sorry.

/**
 * @ORM\Entity(repositoryClass=UserRepository::class)
 * @UniqueEntity("mail")
 * @UniqueEntity("psn")
 * @ORM\Table(name="`user`")
 */
class User implements UserInterface
{
     /**
     * @ORM\Column(type="string", length=255, unique=true)
     * @Assert\Unique
     * @Assert\Email
     * @Assert\NotBlank
     */
    private $mail;
}

You can't have UniqueEntity and @Assert\Unique in the same time, this doesn't make any sense to have the both.

Thank you