Let the db manage created at / updated at fields with Doctrine

CreatedAtType.php

<?php

namespace Dot\SkeletonBundle\Doctrine\DBAL\Types;

use Doctrine\DBAL\Platforms\AbstractPlatform;

class CreatedAtType extends DateTimeImmutableUTCType
{
    public const NAME = 'created_at';

    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform): string
    {
        return 'DATETIME DEFAULT CURRENT_TIMESTAMP';
    }

    public function getName(): string
    {
        return self::NAME;
    }
}

Entity.php

<?php

class User
{

    #[ORM\Column(type: CreatedAtType::NAME, insertable: false, updatable: false)]
    private ?\DateTimeImmutable $createdAt = null;

    #[ORM\Column(type: UpdatedAtType::NAME, insertable: false, updatable: false)]
    private ?\DateTimeImmutable $updatedAt = null;
}

UpdatedAtType.php

<?php

namespace Dot\SkeletonBundle\Doctrine\DBAL\Types;

use Doctrine\DBAL\Platforms\AbstractPlatform;

class UpdatedAtType extends DateTimeImmutableUTCType
{
    public const NAME = 'updated_at';

    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform): string
    {
        return 'DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP';
    }

    public function getName(): string
    {
        return self::NAME;
    }
}