[英]Symfony2 Custom Validation with DB connection but no Entity
I'm simply trying to validate a form (with no entity attached) with one field "username". 我只是在尝试验证具有一个字段“用户名”的表单(不附加任何实体)。 I want to check if the username exists or not.
我想检查用户名是否存在。 If it doesn't a proper message has to be displayed at form errors level (or form field errors level, I don't care that much).
如果不是正确的消息,则必须在表单错误级别(或表单字段错误级别,我不在乎)中显示。
Here is the relevant part of my controller: 这是我的控制器的相关部分:
$formGlobalSearch=$this->createFormBuilder()
->add('username', 'text', array('constraints' => new UsernameExists()))
->add('role', 'choice', array('choices' => $rolesListForForm,'required' => false, 'placeholder' => 'Choose a role', 'label' => false, ))
->add('submitUsername', 'submit', array('label' => 'Search username globally'))
->getForm();
$formGlobalSearch->handleRequest($request);
if ($formGlobalSearch->isValid())
{
// do something in the DB and refresh current page
}
return $this->render(//all the stuff needed to render my page//);
}
Here is the relevant part of service.yml 这是service.yml的相关部分
validator.unique.UsernameExists:
class: AppBundle\Validator\Constraints\UsernameExists
tags:
- { name: validator.constraint_validator, alias: UsernameExists }
Here is the validator class: 这是验证器类:
use Symfony\\Component\\Validator\\Constraint; 使用Symfony \\ Component \\ Validator \\ Constraint;
/**
* @Annotation
*/
class UsernameExists extends Constraint
{
public $message = 'The username "%string%" does not exist.';
public function validatedBy()
{
return 'UsernameExists';
}
}
Here is the validator: 这是验证器:
<?php
namespace AppBundle\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
class UsernameExistsValidator extends ConstraintValidator
{
public function validate($value)
{
$globalUserToAdd = $this->getDoctrine()->getRepository('AppBundle:User')->findOneBy(
array('username' => $value, 'enabled' => true)
);
if ($globalUserToAdd == null) //I did not find the user
{
$this->context->buildViolation($constraint->message)
->setParameter('%string%', $value)
->addViolation();
}
}
}
The class and the validator are in the directory "AppBundle\\Validator\\Constraints" 类和验证器在目录“ AppBundle \\ Validator \\ Constraints”中
I'm getting the following error: 我收到以下错误:
Expected argument of type "Symfony\\Component\\Validator\\ConstraintValidatorInterface", "AppBundle\\Validator\\Constraints\\UsernameExists" given
给定类型为“ Symfony \\ Component \\ Validator \\ ConstraintValidatorInterface”,“ AppBundle \\ Validator \\ Constraints \\ UsernameExists”的预期参数
I of course have the following on top of my controller: 我当然在控制器上有以下内容:
use AppBundle\Validator\Constraints\UsernameExists;
If I add the following to service.yml 如果我将以下内容添加到service.yml
arguments: ["string"]
I get the error: 我得到错误:
No default option is configured for constraint AppBundle\\Validator\\Constraints\\UsernameExists
没有为约束AppBundle \\ Validator \\ Constraints \\ UsernameExists配置默认选项
try changing: 尝试更改:
public function validatedBy()
{
return 'UsernameExists';
}
validator.unique.UsernameExists:
class: AppBundle\Validator\Constraints\UsernameExists
to: 至:
public function validatedBy()
{
return 'UsernameExistsValidator';
}
validator.unique.UsernameExists:
class: AppBundle\Validator\Constraints\UsernameExistsValidator
Merging (partially) the suggestions and debugging a bit more here is the final code. 合并(部分)建议并在此处进行更多调试是最终代码。
Validator: 验证器:
<?php
namespace AppBundle\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Doctrine\ORM\EntityManager;
class UsernameExistsValidator extends ConstraintValidator
{
public function __construct(EntityManager $em) //added
{
$this->em = $em;
}
public function validate($value, Constraint $constraint)
{
$em = $this->em;
$globalUserToAdd = $em->getRepository('AppBundle:User')->findOneBy(
array('username' => $value, 'enabled' => true)
);
if ($globalUserToAdd == null) //I did not find the user
{
$this->context->buildViolation($constraint->message)
->setParameter('%string%', $value)
->addViolation();
}
}
}
service.yml service.yml
validator.unique.UsernameExists:
class: AppBundle\Validator\Constraints\UsernameExistsValidator
arguments: [ @doctrine.orm.entity_manager, "string"]
tags:
- { name: validator.constraint_validator, alias: UsernameExists }
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