的信息： 我在发布之前进行了搜索，并尝试了建议的解决方案，所有这些都让我回到问题a或b，如下所述。因此虽然这可能看起来像重复，但迄今为止没有其他答案帮我解决了这个问题。
此外，我用MyApp替换了真实的捆绑名称。
问题：
我试图让Symfony应用程序正常运行。我按照Symfony 2.8文档创建了一个数据库和表，登录过程正常。在我添加表单以创建新用户后，我遇到了ChoiceType和我的登录页面的错误。
具体来说，当我在getRoles()中将return array($this->roles);设置为Entity/User.php时，登录正常，但我在创建用户表单中收到以下错误。
GET / admin /具有多个=＆gt; false的用户（访问页面）
Notice: Array to string conversion
500 Internal Server Error - ContextErrorException
Stack Trace
in vendor/symfony/symfony/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php at line 79 -
if (null === $value && $this->castableToString($choices)) {
$value = function ($choice) {
return false === $choice ? '0' : (string) $choice;
};
}
at ErrorHandler ->handleError ('8', 'Array to string conversion', '/home/dev/MyApp/vendor/symfony/symfony/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php', '79', array('choice' => array(null)))
in vendor/symfony/symfony/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php at line 79 +
at ArrayChoiceList ->Symfony\Component\Form\ChoiceList\{closure} (array(null))
at call_user_func (object(Closure), array(null))
in vendor/symfony/symfony/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php at line 164 +
at ArrayChoiceList ->getValuesForChoices (array(array(null)))
in vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php at line 32 +
at ChoiceToValueTransformer ->transform (array(null))
in vendor/symfony/symfony/src/Symfony/Component/Form/Form.php at line 1156 +
at Form ->normToView (array(null))
in vendor/symfony/symfony/src/Symfony/Component/Form/Form.php at line 351 +
at Form ->setData (array(null))
in vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php at line 49 +
at PropertyPathMapper ->mapDataToForms (object(User), object(RecursiveIteratorIterator))
in vendor/symfony/symfony/src/Symfony/Component/Form/Form.php at line 384 +
at Form ->setData (object(User))
in vendor/symfony/symfony/src/Symfony/Component/Form/Form.php at line 488 +
at Form ->initialize ()
in vendor/symfony/symfony/src/Symfony/Component/Form/FormBuilder.php at line 226 +
at FormBuilder ->getForm ()
in vendor/symfony/symfony/src/Symfony/Component/Form/FormFactory.php at line 33 +
at FormFactory ->create ('MyAppBundle\Form\UserType', object(User), array())
in vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php at line 282 +
at Controller ->createForm ('MyAppBundle\Form\UserType', object(User))
in src/MyAppBundle/Controller/AdminController.php at line 214 +
at AdminController ->adminUsersAction (object(Request))
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 135 +
at HttpKernel ->handleRaw (object(Request), '1')
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 57 +
at HttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php at line 67 +
at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php at line 183 +
at Kernel ->handle (object(Request))
in web/app_dev.php at line 30 +
at require ('/home/dev/MyApp/web/app_dev.php')
in vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php at line 40 +
我尝试按照某些答案中的建议设置multiple=>true（即使我不想要多选）。这解决了渲染错误，但表单提交中也出现了相同的错误。
使用/admin/users 发布到multiple=>true（提交用户表单）
Notice: Array to string conversion
500 Internal Server Error - ContextErrorException
Stack Trace
in vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php at line 67 -
public function bindValue($param, $value, $type = \PDO::PARAM_STR)
{
try {
return parent::bindValue($param, $value, $type);
} catch (\PDOException $exception) {
throw new PDOException($exception);
}
at ErrorHandler ->handleError ('8', 'Array to string conversion', '/home/dev/MyApp/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php', '67', array('param' => '5', 'value' => array('ROLE_USER'), 'type' => '2'))
at PDOStatement ->bindValue ('5', array('ROLE_USER'), '2')
in vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php at line 67 +
at PDOStatement ->bindValue ('5', array('ROLE_USER'), '2')
in vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php at line 120 +
at Statement ->bindValue ('5', array('ROLE_USER'), object(StringType))
in vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php at line 277 +
at BasicEntityPersister ->executeInserts ()
in vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php at line 1014 +
at UnitOfWork ->executeInserts (object(ClassMetadata))
in vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php at line 378 +
at UnitOfWork ->commit (null)
in vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php at line 356 +
at EntityManager ->flush ()
in src/MyAppBundle/Controller/AdminController.php at line 228 +
at AdminController ->adminUsersAction (object(Request))
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 135 +
at HttpKernel ->handleRaw (object(Request), '1')
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 57 +
at HttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php at line 67 +
at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php at line 183 +
at Kernel ->handle (object(Request))
in web/app_dev.php at line 30 +
at require ('/home/dev/MyApp/web/app_dev.php')
in vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php at line 40 +
将getRoles()更改为return $this->roles;确实解决了呈现和发布问题，但导致登录功能出现相反的问题。
登录请求/login
Type error: Argument 4 passed to Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken::__construct() must be of the type array, string given, called in /home/dev/MyApp/vendor/symfony/security/Core/Authentication/Provider/UserAuthenticationProvider.php on line 96
500 Internal Server Error - FatalThrowableError
Stack Trace
in vendor/symfony/security/Core/Authentication/Token/UsernamePasswordToken.php at line 36 -
*
* @throws \InvalidArgumentException
*/
public function __construct($user, $credentials, $providerKey, array $roles = array())
{
parent::__construct($roles);
at UsernamePasswordToken ->__construct (object(User), 'test', 'main', 'ROLE_USER')
in vendor/symfony/security/Core/Authentication/Provider/UserAuthenticationProvider.php at line 96 +
at UserAuthenticationProvider ->authenticate (object(UsernamePasswordToken))
in app/cache/dev/classes.php at line 2749 +
at AuthenticationProviderManager ->authenticate (object(UsernamePasswordToken))
in vendor/symfony/security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php at line 93 +
at UsernamePasswordFormAuthenticationListener ->attemptAuthentication (object(Request))
in vendor/symfony/security/Http/Firewall/AbstractAuthenticationListener.php at line 146 +
at AbstractAuthenticationListener ->handle (object(GetResponseEvent))
in app/cache/dev/classes.php at line 2664 +
at Firewall ->onKernelRequest (object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
at call_user_func (array(object(Firewall), 'onKernelRequest'), object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
in vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php at line 61 +
at WrappedListener ->__invoke (object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher))
at call_user_func (object(WrappedListener), object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher))
in app/cache/dev/classes.php at line 1888 +
at EventDispatcher ->doDispatch (array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent))
in app/cache/dev/classes.php at line 1803 +
at EventDispatcher ->dispatch ('kernel.request', object(GetResponseEvent))
in vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php at line 133 +
at TraceableEventDispatcher ->dispatch ('kernel.request', object(GetResponseEvent))
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 116 +
at HttpKernel ->handleRaw (object(Request), '1')
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php at line 57 +
at HttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php at line 67 +
at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
in vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php at line 183 +
at Kernel ->handle (object(Request))
in web/app_dev.php at line 30 +
at require ('/home/dev/MyApp/web/app_dev.php')
in vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/router_dev.php at line 40 +
如何处理用户表单和登录中的一系列角色，以便两者都满足$roles的格式？
源代码供参考。
窗体/ UserType.php
[...]
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('email', EmailType::class)
->add('username', TextType::class)
->add('roles', ChoiceType::class, array(
'multiple' => true,
'expanded' => false,
'choices' => array(
'User' => 'ROLE_USER',
'Admin' => 'ROLE_ADMIN'),
'choices_as_values' => true,
))
->add('plainPassword', RepeatedType::class, array(
'type' => PasswordType::class,
'first_options' => array('label' => 'Password'),
'second_options' => array('label' => 'Repeat Password'),
)
);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'MyAppBundle\Entity\User',
));
}
[...]
实体/ user.php的
[...]
/**
* @ORM\Table(name="app_users")
* @ORM\Entity(repositoryClass="MyAppBundle\Entity\UserRepository")
*/
class User implements UserInterface, \Serializable
{
/**
* @ORM\Column(type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORM\Column(type="string", length=25, unique=true)
*/
private $username;
/**
* @ORM\Column(type="string", length=64)
*/
private $password;
/**
* @ORM\Column(type="string", length=60, unique=true)
*/
private $email;
/**
* @ORM\Column(name="is_active", type="boolean")
*/
private $isActive;
/**
* @ORM\Column(name="roles", type="string")
*/
private $roles;
/**
* @Assert\NotBlank()
* @Assert\Length(max=4096)
*/
private $plainPassword;
public function __construct()
{
// default for new users
$this->isActive = true;
//$this->roles = "ROLE_USER";
}
[...]
public function getRoles()
{
//return $this->roles;
return array($this->roles);
}
/** @see \Serializable::serialize() */
public function serialize()
{
return serialize(array(
$this->id,
$this->username,
$this->password,
));
}
/** @see \Serializable::unserialize() */
public function unserialize($serialized)
{
list (
$this->id,
$this->username,
$this->password,
) = unserialize($serialized);
}
[...]
/**
* Set Roles
*
* @param string $roles
*
* @return User
*/
public function setRoles($roles)
{
$this->roles = $roles;
return $this;
}
[...]
控制器/ AdminController.php
/**
* @Route("/admin/users")
*/
public function adminUsersAction(Request $request)
{
//
$repository = $this->getDoctrine()
->getRepository('MyAppBundle:User');
$users = $repository->findAll();
// USER FORM
// 1) build the form
$user = new User();
$form = $this->createForm(UserType::class, $user);
// 2) handle the submit (will only happen on POST)
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
// 3) Encode the password (you could also do this via Doctrine listener)
$password = $this->get('security.password_encoder')
->encodePassword($user, $user->getPlainPassword());
$user->setPassword($password);
// 4) save the User!
$em = $this->getDoctrine()->getManager();
$em->persist($user);
$em->flush();
return $this->redirectToRoute('dashboard');
}
return $this->render(
'MyAppBundle:Admin:users.html.twig',
array(
"form"=>$form->createView(),
"users"=>$users
)
);
}
资源/视图/管理/ users.html.twig
<h2>Add Users</h2>
{{ form_start(form) }}
{{ form_row(form.username) }}
{{ form_row(form.email) }}
{{ form_row(form.roles) }}
{{ form_row(form.plainPassword.first) }}
{{ form_row(form.plainPassword.second) }}
<button type="submit">Add User</button>
{{ form_end(form) }}
答案 0 :(得分：2)
看起来您的角色正在保存为字符串：
/**
* @ORM\Column(name="roles", type="string")
*/
private $roles;
这将存储文字字符串ROLE_USER而不是序列化数组a:1:{i:0;s:9:"ROLE_USER";}。尝试：
/**
* @ORM\Column(name="roles", type="array")
*/
private $roles;
setter应该从具有多个选择支持的ChoiceType中获取数组：
/**
* @param array $roles
* @return User
*/
public function setRoles($roles)
{
$this->roles = $roles;
return $this;
}
getter应该将属性作为数组返回，而不必手动将其转换为数组：
public function getRoles()
{
return $this->roles;
}