我已经创建了一个具有安全功能的提供程序.在
the doc之后,我创建了自己的ExpressionLanguage类并注册了提供程序.
namespace AppBundle\ExpressionLanguage;
use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage;
use Symfony\Component\ExpressionLanguage\ParserCache\ParserCacheInterface;
class ExpressionLanguage extends BaseExpressionLanguage
{
public function __construct(ParserCacheInterface $parser = null, array $providers = array())
{
// prepend the default provider to let users override it easily
array_unshift($providers, new AppExpressionLanguageProvider());
parent::__construct($parser, $providers);
}
}
我使用相同的函数小写,即in the doc.但是现在,我没有ideia如何注册要在我的Symfony项目中加载的ExpressionLanguage类.
每次我尝试在注释中加载带有自定义函数的页面时,我都会收到此错误:
The function “lowercase” does not exist around position 26.
我正在使用Symfony 2.7.5.
最佳答案 标记security.expression_language_provider仅用于将语言提供程序添加到symfonys安全组件中使用的表达式语言,或者更具体地说,在ExpressionVoter中.
FrameworkBundle的@ Security-Annotation使用表达式语言的不同实例,该实例不了解您创建的语言提供程序.
为了能够在@ Security-Annotation中使用自定义语言提供程序,我使用以下编译器传递解决了这个问题:
<?php
namespace ApiBundle\DependencyInjection\Compiler;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\Reference;
/**
* This compiler pass adds language providers tagged
* with security.expression_language_provider to the
* expression language used in the framework extra bundle.
*
* This allows to use custom expression language functions
* in the @Security-Annotation.
*
* Symfony\Bundle\FrameworkBundle\DependencyInection\Compiler\AddExpressionLanguageProvidersPass
* does the same, but only for the security.expression_language
* which is used in the ExpressionVoter.
*/
class AddExpressionLanguageProvidersPass implements CompilerPassInterface
{
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container)
{
if ($container->has('sensio_framework_extra.security.expression_language')) {
$definition = $container->findDefinition('sensio_framework_extra.security.expression_language');
foreach ($container->findTaggedServiceIds('security.expression_language_provider') as $id => $attributes) {
$definition->addMethodCall('registerProvider', array(new Reference($id)));
}
}
}
}
这样,ExpressionVoter和FrameworkBundle使用的表达式语言都使用相同的语言提供程序进行配置.