Question

我在Symfony2项目中有一个Doctrine过滤器。我试图在每个请求上将filter的参数设置为某个值（取自session）。问题是过滤器对象是在Symfony的onKernelRequest事件之后创建的，所以我无法从那里设置它。如果我尝试在Doctrine的postConnect事件中设置它，则会检测到循环依赖：

ServiceCircularReferenceException: Circular reference detected for service "doctrine.orm.private_entity_manager", path: "routing.loader -> assetic.asset_manager -> twig -> translator.default -> doctrine.orm.private_entity_manager -> doctrine.dbal.private_connection -> year_visibility.parameter_setter".

问题是，我应该在哪里（或者更确切地说）设置过滤器的参数？

Answer 1

您可以尝试手动定义过滤器并同时传递所需的参数。

services:
    app.filter_manager:
        class: App\Bundle\AppBundle\Filter\FilterManager
        arguments: [@doctrine.orm.entity_manager, @session]
        tags:
            - { name: kernel.event_listener, event: kernel.request, method: onKernelRequest }

在过滤器管理器类中：

// ...

public function __construct(EntityManager $em, SessionInterface $session) 
{
    $this->em = $em;
    $this->session = $session;
}

// ...

public function onKernelRequest()
{
    $this->em->getConfiguration()->addFilter('filter_name', 'Filter/Class/Name/With/Ns');

    $filter = $this->em->getFilters()->enable('filter_name');
    $filter->setParameter('param_name', $this->session->get('param_name'));
}

Answer 2

如下所示：https://stackoverflow.com/a/14650403/244058，

您可以在内核启动时拥有Filter类的实例。因此，您的实例可以提前非常。

<?php

class MyBundle extends Bundle 
{
    public function boot()
    {
        $em = $this->container->get('doctrine.orm.default_entity_manager');
        $conf = $em->getConfiguration();
        $conf->addFilter(
            'filter_name',
            'Doctrine\Filter\TestFilter'
        );

        // either enable it here, or later in the event listener
        $em->getFilters()->enable('filter_name');
    }
}

之后，只需添加一个侦听kernel.request的kernel.event_listener并设置一个过滤器参数（如下所示）：

<?php

class DoctrineSqlFilterConfigurator
{
    private $em; // inject the entity manager somehow (ctor is a good idea)

    public function onKernelRequest(GetResponseEvent $event)
    {
        $filter = $this->em->getFilters()->enable('filter_name');
        $filter->setParameter('param_name', $event->getRequest()->getSession()->get('param_name'));
    }
}

在Symfony2中的每个请求上设置Doctrine过滤器的参数

2 个答案: