Symfony - Entity with a unique value in two fields - symfony

Question

In my user entity, I have two fields (username and email)
and I want them to be mutually unique. I put the Annotation « UniqueEntity » on the top of my entity class and a unique property on each field like this :
/**
* Class User
* #package App\Entity
* #ORM\Table(name="user", uniqueConstraints={
* #ORM\UniqueConstraint(name="app_user_email", columns="email"),
* #ORM\UniqueConstraint(name="app_user_username", columns="username")
* })
* #ORM\Entity(repositoryClass="App\Repository\UserRepository")
* #UniqueEntity(fields={"email"})
* #UniqueEntity(fields={"username"})
*/
class User implements UserInterface, \Serializable
{
....
/**
* #var string
*
* #ORM\Column(type="string", length=255, unique=true)
* #Assert\NotBlank
*/
private $username;
/**
* #var string
*
* #ORM\Column(type="string", length=255, unique=true)
* #Assert\Email
* #Assert\NotBlank
* #Assert\Length(max=255, maxMessage="...")
*/
private $email;
....
}
In my database I can't have 2 identical email or username. This is a valid point. I want moreover that a value in one of the two fields is not found in one of the other two fields.
For example, if an entry in the User table has a specific email value, I do not want to be able to enter the same value in the username field for an other user.
What is the best way to do this ?
The purpose of all this is for a user to be able to authenticate with his username or email and if a mail for a user is equal to a username of another user it will cause a problem.

Answer 1

Hy, in your entity you can add a callback constraint
First add
use Symfony\Component\Validator\Context\ExecutionContextInterface;
and in your class add
/**
* #Assert\Callback
*/
public function validate(ExecutionContextInterface $context, $payload)
{
if ($this->username == $this->email) {
$context->buildViolation('The username can\'t be the email')
->atPath('username')
->addViolation();
}
}
check https://symfony.com/doc/current/reference/constraints/Callback.html for your symfony version