Symfony2从twig扩展服务访问用户

Question

当我在我的symfony2服务(twig扩展)中注入security.context时,会出现以下错误:

在非对象上调用成员函数getUser().....

class GeninnoShareboardExtension extends \Twig_Extension {
    public function __construct(ContainerInterface $container, SecurityContext $context) {
        $this->doctrine = $container->get('doctrine');
        $this->context = $context;
    }

    public function getUser() {
        return $this->context->getToken()->getUser();
    }

    ........
}

我的services.yml看起来像这样:

services:
  geninno.twig.extension.dashboard:
    class: Geninno\EDSBundle\Twig\Extension\GeninnoShareboardExtension
    arguments:
      container: "@service_container"
      service: "@security.context"
    tags:
     - { name: twig.extension }

用户已登录,我的防火墙设置如下:

access_control:
    - { path: ^/secured/register, roles: IS_AUTHENTICATED_ANONYMOUSLY }
    - { path: ^/secured/create, roles: IS_AUTHENTICATED_ANONYMOUSLY }
    - { path: ^/secured/login, roles: IS_AUTHENTICATED_ANONYMOUSLY }
    - { path: ^/, roles: [IS_AUTHENTICATED_FULLY, IS_AUTHENTICATED_REMEMBERED] }

Answer 1

我通过在 SecurityContext 调用中添加 if 来解决这个问题。检查 GetToken() 是否返回对象（已验证）或字符串（匿名）

if (is_object($this->context->getToken()))
{
    .... // getUser() etc.
}