如何修复YAML文件上的“循环引用”错误？

Question

FileLoaderImportCircularReferenceException:在“/app/config/routing_dev.yml”（“/app/config/routing_dev.yml”）中检测到循环引用

我正在努力做到这一点：http://symfony.com/doc/current/cookbook/routing/custom_route_loader.html#more-高级装载机

所以我创建了这个文件

AdvancedLoader.php

<?php
//namespace Acme\DemoBundle\Routing;
namespace Gabriel\AdminPanelBundle\Routing;

use Symfony\Component\Config\Loader\Loader;
use Symfony\Component\Routing\RouteCollection;

class AdvancedLoader extends Loader
{
    public function load($resource, $type = null)
    {
        $collection = new RouteCollection();

        $resource = '@GabrielAdminPanelBundle/Resources/config/routing.yml';
        $type = 'yaml';

        $importedRoutes = $this->import($resource, $type);

        $collection->addCollection($importedRoutes);

        return $collection;
    }

    public function supports($resource, $type = null)
    {
        return $type === 'advanced_extra';
    }
}

/src/Gabriel/AdminPanelBundle/Resources/config/services.yml

services:
    gabriel.routing_loader:
        class: Gabriel\AdminPanelBundle\Routing\AdvancedLoader
        tags:
            - { name: routing.loader }

/app/config/routing.yml

gabriel_messaging:
    resource: "@GabrielMessagingBundle/Controller/"
    type:     annotation
    prefix:   /

fos_js_routing:
    resource: "@FOSJsRoutingBundle/Resources/config/routing/routing.xml"

# app/config/routing.yml
Gabriel_Extra:
    resource: .
    type: advanced_extra

app/配置/routing_dev.yml

_wdt:
    resource: "@WebProfilerBundle/Resources/config/routing/wdt.xml"
    prefix:   /_wdt

_profiler:
    resource: "@WebProfilerBundle/Resources/config/routing/profiler.xml"
    prefix:   /_profiler

_configurator:
    resource: "@SensioDistributionBundle/Resources/config/routing/webconfigurator.xml"
    prefix:   /_configurator

_main:
    resource: routing.yml

/src/Gabriel/AdminPanelBundle/Resources/config/routing.yml

gabriel_admin_panel:
    resource: "@GabrielAdminPanelBundle/Controller/"
    type:     advanced_extra
    prefix:   /superuser

Answer 1

仔细看看@GabrielAdminPanelBundle/Resources/config/routing.yml：

gabriel_admin_panel:
    resource: "@GabrielAdminPanelBundle/Controller/"
    type:     advanced_extra
    prefix:   /superuser

类型指定应该使用哪个加载程序，在本例中，您所说的advanced\u extra，即您的加载程序。您的加载程序再次包含该文件，该文件将再次执行加载程序，这将永远持续（换句话说：循环引用）。

还请注意，您已经在app/config/routing.yml中包含了路由：

gabriel_messaging:
    resource: "@GabrielMessagingBundle/Controller/"
    type:     annotation
    prefix:   /

这一次，您使用了正确的类型：annotation。您应该删除此条目并编辑@GabrielAdminPanelBundle/Resources/config/routing.yml文件以使用正确的类型。