Symfony 在运行时重写条令实体管理器

我正在尝试在我的Symfony2项目中创建一个演示系统，允许为登录到我正在工作的系统中的每个“演示”用户创建一个临时sqlite演示数据库，这样每个用户都可以访问一组默认数据，并且可以修改数据，而不会干扰登录到系统中的其他演示用户

首先，我定义了一个演示连接和一个orm条目，其中包含对我想重定向到config.yml中temp db的所有bundle的引用，然后在登录时覆盖连接细节（更准确地说是db路径），以包含登录用户的会话id。所以从理论上讲，当他们登录时，他们将有权访问一组默认的演示数据，当他们注销时，不会保留任何更改，只有他们才能看到这些更改

$this->doctrine->resetManager（'demo'）

问题是，当我试图修改演示连接以指向新路径时，当我调用上述步骤时（正如我发现散布在互联网上的几篇文章中提到的），系统会因一个我不熟悉且不确定如何处理的错误而死亡。如果有人能帮助我了解出了什么问题，我应该能够解决，但目前我遇到了困难：(

错误输出：

这个过程是：

• 演示用户登录（内存中，未存储任何数据库）
• 登录侦听器覆盖“demo”实体管理器，将数据库位置更改为/tmp/portal\u demo\u[SESSION\u ID].DB，并用演示数据填充它
• 接下来的所有数据库调用都应该使用demo数据库

这是我的密码：

Config.yml 听众

doctrine:
    dbal:
      default_connection: default
      connections:
        demo:
          driver:   pdo_sqlite
        default:
          driver:   "%database_driver%"
          host:     "%database_host%"
          port:     "%database_port%"
          dbname:   "%database_name%"
          user:     "%database_user%"
          password: "%database_password%"
          charset:  UTF8
          # Following added to allow importing of existing mysql database. DZH
          mapping_types:
              enum:       string
orm:
  default_entity_manager: default
  entity_managers:
    default:
      connection: default
      mappings:
        SPSettingsBundle: ~
        SPUserBundle: ~
        SPCompanyBundle: ~
        SPVenueBundle: ~
        SPAccessBundle: ~
        SPHardwareBundle: ~
        SPResellerBundle: ~
        SPVouchersBundle: ~
        SPTokenBundle: ~
        SPAdminBundle: ~
        SPSocialBundle: ~
    demo:
      connection: demo
      mappings:
        SPUserBundle: ~
        SPCompanyBundle: ~
        SPVenueBundle: ~
        SPAccessBundle: ~
        SPHardwareBundle: ~
        SPResellerBundle: ~
        SPVouchersBundle: ~
        SPTokenBundle: ~
        SPAdminBundle: ~
        SPSocialBundle: ~
        SPLegacyPortalBundle:
          type: "annotation"
          dir: "Entity"
        SPLegacyPortalBundle:
          type: "annotation"
          dir: "Entity/Radius"

<?php

namespace SP\DemoBundle\Listener;

use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
use Doctrine\DBAL\Connection;
use Doctrine\Bundle\DoctrineBundle\Registry;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Component\Console\Input\ArrayInput;

class DemoLoginListener {

    private $defaultConnection;
    private $doctrine;
    private $kernel;

    public function __construct(Connection $defaultConnection, Registry $doctrine, KernelInterface $kernel) {
        $this->defaultConnection = $defaultConnection;
        $this->doctrine = $doctrine;
        $this->kernel = $kernel;
    }

    /**
     * Create initial database schema
     */
    public function createDbSchema() {
        $application = new \Symfony\Bundle\FrameworkBundle\Console\Application($this->kernel);
        $application->setAutoExit(false);

        // Run initial schema install
        $application->run(new ArrayInput(array(
            'doctrine:schema:create',
            '--em' => 'demo'
        )));
    }

    /**
     * Populate database with demo data
     */
    public function populateDemoData() {
        $query = <<<EOT
INSERT INTO `Company` (`account_manager_id`, `package_id`, `name`, `owner_first_name`, `owner_last_name`, `telephone`, `mobile`, `email`, `venues`, `created_by`, `date_created`) VALUES
(NULL, NULL, 'Demo Company', 'Demo', 'User', NULL, NULL, 'demo@company.com', 'N;', 1, '2013-05-16 15:06:16');
EOT;
        $this->defaultConnection->query($query);
    }

    public function onSecurityInteractiveLogin(InteractiveLoginEvent $event) {
        $token = $event->getAuthenticationToken();
        $user = $token->getUser();

        // Only create demo database with the 'demo' in_memory user logs in
        if ('demo' == $user->getUsername()) {
            $request = $event->getRequest();
            $session = $request->getSession();

            if ($session) {
                $db_name = sprintf('/tmp/portal_demo_%s.db', $session->getId());

                $this->defaultConnection->close();

                $reflectionConn = new \ReflectionObject($this->defaultConnection);
                $reflectionParams = $reflectionConn->getProperty('_params');
                $reflectionParams->setAccessible('public');

                $params = $reflectionParams->getValue($this->defaultConnection);
                $params['driver'] = 'pdo_sqlite';
                $params['dbname'] = $db_name;
                $params['path'] = $db_name;
                unset($params['host']);
                unset($params['port']);
                unset($params['password']);
                unset($params['user']);

                $reflectionParams->setValue($this->defaultConnection, $params);
                $reflectionParams->setAccessible('private');

                $this->doctrine->resetManager('demo');

                // $this->defaultConnection->connect();
            }
        }

        // Create the naked database
        // $this->createDbSchema();

        // Populate the database with demo data
        // $this->populateDemoData();
    }

}