我尝试在我的Symfony2项目中使用以下设置：

• 用于处理文件上传的VichUploader捆绑包
• KnpGaufrette 捆绑包，应由 VichUploader 用作存储适配器

问题：一旦我尝试使用Gaufrette存储适配器"doctrine_dbal"，我就会收到以下错误：

[Symfony'Component'DependencyInjection'Exception'ServiceCircularReferenceException]                                                                                                                                                                                                                 
Circular reference detected for service "doctrine.dbal.default_connection", path: "doctrine.orm.default_entity_manager -> doctrine.dbal.default_connection -> vich_uploader.upload_handler -> vich_uploader.storage.gaufrette -> knp_gaufrette.filesystem_map -> gaufrette.storage_fs_filesystem".  

一旦Symfony尝试检查配置，例如

app/console cache:clear

如何解决此问题？

我的设置

我的项目设置是具有版本2.5.*的symfony/framework-standard-edition的默认设置，没有AcmeDemo Bundle。

我只是通过作曲家添加了捆绑包：

composer require knplabs/knp-gaufrette-bundle vich/uploader-bundle

。将它们添加到AppKernel的registerBundles()：

//...
$bundles = array(
        new Symfony'Bundle'FrameworkBundle'FrameworkBundle(),
        new Symfony'Bundle'SecurityBundle'SecurityBundle(),
        new Symfony'Bundle'TwigBundle'TwigBundle(),
        new Symfony'Bundle'MonologBundle'MonologBundle(),
        new Symfony'Bundle'SwiftmailerBundle'SwiftmailerBundle(),
        new Symfony'Bundle'AsseticBundle'AsseticBundle(),
        new Doctrine'Bundle'DoctrineBundle'DoctrineBundle(),
        new Sensio'Bundle'FrameworkExtraBundle'SensioFrameworkExtraBundle(),
        new AppBundle'AppBundle(),
        new Vich'UploaderBundle'VichUploaderBundle(), //NEW 
        new Knp'Bundle'GaufretteBundle'KnpGaufretteBundle(), //NEW
    );
//...

。并将以下配置添加到 config.yml 中，该配置基于文档 VichUploader with Gaufrette 和 KnpGaufrette with Doctrine DBAL：

# ...
knp_gaufrette:
    stream_wrapper: ~
    adapters:
        storage_adapter:
            doctrine_dbal:
                connection_name: default
                table: data_storage
                columns:
                    key: id
                    content: file
                    mtime: mtime
                    checksum: checksum
    filesystems:
        storage_fs:
            adapter:    storage_adapter

vich_uploader:
    db_driver: orm
    storage:   gaufrette
    mappings:
        storage:
            uri_prefix:         /images/products
            upload_destination: storage_fs