Question

在添加用户navbar的索引页面时，我在 Symfony 4.2.2 项目的TraceableVoter构造函数中有一个TypeError。 Security.yaml文件附加到下面的此问题。

所有项目源都是Udemy提供的Symfony 4课程的完整副本。
TypeError具有以下回溯：

传递给Symfony \ Component \ Security \ Core \ Event \ VoteEvent :: __ construct（）的参数4必须为整数类型，给定为null，在/ home / vagrant / symfony-01 / vendor / symfony / security-中调用第40行的core / Authorization / Voter / TraceableVoter.php Twig_Environment-> render（'micro-post / index.html.twig'，array（'posts'=> array（object（MicroPost），object（MicroPost），object（MicroPost），object（MicroPost），object（MicroPost），对象（MicroPost），对象（MicroPost），对象（MicroPost），对象（MicroPost），对象（MicroPost））））在src / Controller / MicroPostController.php中（第81行）

intex.html的导航栏


<nav class="navbar navbar-dark navbar-expand-md sticky-top bg-dark p-0">
    <a class="navbar-brand col-sm-3 col-md-2 mr-0"
       href="{{ path('micro_post_index') }}">Micro Post App</a>
    <div class="w-100 order-1 order-md-0">
        <ul class="navbar-nav px-3">
            {% if is_granted('ROLE_USER') %}
                <li class="nav-item text-nowrap">
                    <a class="nav-link" href="{{ path('micro_post_add') }}">Add new</a>
                </li>
            {% endif %}
        </ul>
    </div>

    <div class="order-2 order-md-1">
        <ul class="navbar-nav px-3">
            {% if is_granted('ROLE_USER') %}
                <li class="nav-item text-nowrap">
                    <a class="nav-link"
                       href="#">{{ app.user.fullName }}</a>
                </li>
                <li class="nav-item text-nowrap">
                    <a class="nav-link"
                       href="{{ path('security_logout') }}">Sign out</a>
                </li>
            {% else %}
                <li class="nav-item text-nowrap">
                    <a class="nav-link"
                       href="{{ path('security_login') }}">Sign in</a>
                </li>
            {% endif %}
        </ul>
    </div>
</nav>

MicroPostController.php中的处理索引页面

    /**
     * @Route("/", name="micro_post_index")
     * */
    public function index()
    {
        $html = $this->twig->render('micro-post/index.html.twig', ['posts' => $this->microPostRepository->findAll()]);
        return new Response($html);
    }

security.yaml

security:
    encoders:
        App\Entity\User:
            algorithm: bcrypt
        app_user_provider:
            entity:
                class: App\Entity\User
                property: username
    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        main:
            anonymous: true
            pattern: ^/
            form_login:
                check_path: security_login
                login_path: security_login
                csrf_token_generator: security.csrf.token_manager
                default_target_path: micro_post_index
            logout:
                path: security_logout
                target: micro_post_index
    access_control:
        - { path: ^/micro-post, roles: ROLE_USER }

这不是重复的问题。转换角色toArray() 不能解决我的问题。这是完整的堆栈跟踪：

TypeError:
Argument 4 passed to Symfony\Component\Security\Core\Event\VoteEvent::__construct() must be of the type integer, null given, called in /home/vagrant/symfony-01/vendor/symfony/security-core/Authorization/Voter/TraceableVoter.php on line 40

  at vendor/symfony/security-core/Event/VoteEvent.php:31
  at Symfony\Component\Security\Core\Event\VoteEvent->__construct(object(ExampleVoter), object(Request), array('ROLE_USER'), null)
     (vendor/symfony/security-core/Authorization/Voter/TraceableVoter.php:40)
  at Symfony\Component\Security\Core\Authorization\Voter\TraceableVoter->vote(object(AnonymousToken), object(Request), array('ROLE_USER'))
     (vendor/symfony/security-core/Authorization/AccessDecisionManager.php:73)
  at Symfony\Component\Security\Core\Authorization\AccessDecisionManager->decideAffirmative(object(AnonymousToken), array('ROLE_USER'), object(Request))
     (vendor/symfony/security-core/Authorization/AccessDecisionManager.php:60)
  at Symfony\Component\Security\Core\Authorization\AccessDecisionManager->decide(object(AnonymousToken), array('ROLE_USER'), object(Request))
     (vendor/symfony/security-core/Authorization/TraceableAccessDecisionManager.php:61)
  at Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager->decide(object(AnonymousToken), array('ROLE_USER'), object(Request))
     (vendor/symfony/security-http/Firewall/AccessListener.php:67)
  at Symfony\Component\Security\Http\Firewall\AccessListener->handle(object(GetResponseEvent))
     (vendor/symfony/security-bundle/Debug/WrappedListener.php:46)
  at Symfony\Bundle\SecurityBundle\Debug\WrappedListener->handle(object(GetResponseEvent))
     (vendor/symfony/security-bundle/Debug/TraceableFirewallListener.php:35)
  at Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener->handleRequest(object(GetResponseEvent), object(Generator))
     (vendor/symfony/security-http/Firewall.php:90)
  at Symfony\Component\Security\Http\Firewall->onKernelRequest(object(GetResponseEvent))
     (vendor/symfony/security-bundle/EventListener/FirewallListener.php:48)
  at Symfony\Bundle\SecurityBundle\EventListener\FirewallListener->onKernelRequest(object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:111)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(GetResponseEvent), 'kernel.request', object(EventDispatcher))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:212)
  at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:44)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:145)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent))
     (vendor/symfony/http-kernel/HttpKernel.php:126)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:67)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:198)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (public/index.php:25)

Answer 1

关于MicroPostController.php（索引操作），有一些说明，

渲染模板视图时，您只需要做$this->render('path_to_template)；而不是$this->twig->render('path_to_template)
您不必将Twig视图传递给任何变量并返回Response（）
如果要在Symfony 4.x中使用 实体存储库 ，请使用 依赖项注入 ，因此您的索引需要像public这样的参数

function index(MicroPostRepository $microPostRepository) {}

然后您的控制器必须是这样

/**
 * @Route("/", name="micro_post_index")
 * */
public function index(MicroPostRepository $microPostRepository)
{
    return $this->render('micro-post/index.html.twig', [
        'posts' => $microPostRepository->findAll()
    ]);
}

最后，要解决该问题，请检查您的用户实体，并将您的 角色获取器 替换为

public function getRoles()
{
    return $this->roles->toArray();
}

要创建用户实体，最佳做法是使用 制造商捆绑包 进行操作，并避免出现此错误

php bin/console make:user

Answer 2

给出了app.js的错误路径-build\js\app.js。通过向基本模板添加有效的app.js路径来解决：

base.html.twig

...

{% block javascripts %}
    <script src="{{ asset('build/app.js') }}"></script>
{% endblock %}

</body>

Answer 3

我有同样的问题。 $result方法中有TraceableVoter->vote个变量。它应该返回一个整数。我转储了这个变量，确实有int 0。但是出于某些原因，VoteEvent类将此值当作null。因此，在TraceableVoter中的第38行之后，我添加了intval($result);。

public function vote(TokenInterface $token, $subject, array $attributes)
{
    $result = $this->voter->vote($token, $subject, $attributes);

    $result = intval($result);//here

    $this->eventDispatcher->dispatch('debug.security.authorization.vote', new VoteEvent($this->voter, $subject, $attributes, $result));

    return $result;
}

我是symfony的新手，所以我不知道我的决定是否正确，但这是可行的。

Answer 4

请确保您没有选民，而选民中的功能没有回报。

当您的投票过程的结果为空时，会发生此错误。

Answer 5

我认为 Alex_B 是正确的。问题是选民-它返回null。如果您在第43课（is_granted）上，则您的ExampleVoter带有空方法投票。所以我就这样使它返回0的false：

App \ Security \ ExampleVoter.php

namespace App\Security;

use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;

class ExampleVoter implements VoterInterface
{

  public function vote(TokenInterface $token, $subject, array $attributes)
  {

  return false;

  }
}

，一切恢复正常。我也是symfony的新手，希望它能解决您的问题。

Answer 6

在默认的symfony设置中，可能存在对VoterInterface的替代，您可以在src / Security / ExampleVoter.php中找到它

public function vote(TokenInterface $token, $subject, array $attributes)
    {
        // TODO: Implement vote() method.
    }

这是返回0的问题；或删除文件夹以停止覆盖。

在Symfony 4中渲染导航栏时发生TypeError

6 个答案: