Syntax
// src/Entity/Product.php
namespace App\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* @ORM\Entity(repositoryClass="App\Repository\ProductRepository")
*/
class Product
{
/**
* @ORM\Column(type="ulid")
* @Assert\Ulid
*/
private $someProperty;
// ...
}