php - Symfony 2 与相关实体的验证

Question

我有用户和订单实体。当用户创建订单时，我应该检查用户现金是否大于订单成本。如何做到这一点？
示例订单实体:

class Order
{
    /**
     * @var integer $id
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var integer $user
     *
     * @ORM\ManyToOne(targetEntity="\App\UserBundle\Entity\User", inversedBy="orders")
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
     */
    private $user;

    /**
     *
     * @ORM\Column(type="integer")
     * @Assert\Min(limit = "1", message = "You must enter positive number")
     */
    private $price;
}

Answer 1

您需要使用 Callback .

The purpose of the Callback assertion is to let you create completely custom validation rules and to assign any validation errors to specific fields on your object.