Php Symfony-Uniquentity验证失败，出现异常“；addConstraint（）必须是Symfony\Component\Validator\Constraint的实例，数组为“给定”；

当我在发布后尝试验证我的用户实体表单时，我得到了一个

ContextErrorException: Catchable Fatal Error: Argument 1 passed to Symfony\Component\Validator\Mapping\ClassMetadata::addConstraint() must be an instance of Symfony\Component\Validator\Constraint, array given

确实，它是一个数组，正如validation.yml中定义的那样

Transplan\CoreBundle\Entity\User:
  constraints:
    \Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity: { fields: [company, username], message: "Brugernavnet er allerede taget" }

但是我如何让验证器理解这是如何根据

我的表单是这样创建的

$user = new User();
$createUserForm = $this->createFormBuilder($user)
   ->add('username', 'text')
   ->add('name', 'text')
   ->add('Opret', 'submit')
   ->getForm();

---

您缺少约束前面的

-

Transplan\CoreBundle\Entity\User:
    constraints:
        - \Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity: [company, username]

---

您缺少约束前面的

-

Transplan\CoreBundle\Entity\User:
    constraints:
        - \Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity: [company, username]