依赖关系将非默认实体管理器注入到Symfony中的服务中 [英] Dependency Inject non-default Entity Manager into Service in Symfony

问题描述

我想从默认em更改为名为 ps的em。配置正确，在控制器中，我只需键入 $ this-> getManager（’ps’）-> getConnection（’ps'）; 。

I want to change from the default em to an em called 'ps'. The configuration is correct and in the controller I can simply type $this->getManager('ps')->getConnection('ps');.

但是我想创建带有依赖项注入的服务，该服务也需要访问此连接。

However I want to create a service with dependency injection which also needs to access this connection.

<?php
namespace AppBundle\Service;

use Doctrine\ORM\EntityManagerInterface;

class HilaService
{

    private $entityManager;
    private $connection;

    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
        $this->connection = $entityManager->getConnection('ps');

    }

    public function getCategories(){
        $query = $this->connection->query(
            'SQL ....'
        );

        $r = $query->execute();
    }
}

由于我无法在任何地方选择实体管理器 ps它也无法加载连接 ps，从而导致错误：

As I can nowhere select the Entity Manager 'ps' it can't also load the connection 'ps', which results in an error:

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'ps_xxx' doesn't exist

我可以通过某种方式将参数传递给注射？还是注入一些父对象然后调用-> getManager（）？

Can I somehow pass an argument to the injection? Or Inject somewhat of a 'parent object' to then call ->getManager()?

推荐答案

如果您的服务类只需要连接，那么它是创建自己的连接类并注入它的最简单方法。

If your service class just needs the connection then it easiest way it make your own connection class and inject it.

namepace AppBundle\Connection;

class PsConnection extends Doctrine\DBAL\Connection
{
}

# doctrine.yaml
doctrine:
    dbal:
        connections:
            ps:
                wrapper_class: AppBundle\Connection\PsConnection

class HilaService
{
    public function __construct(AppBundle\Connection\PsConnection $conn)

一切都会像以前一样工作，但是您可以获取连接

Everything will work as before but you can get the connection directly.

如果您确实需要实体管理器，则可以定义服务：

if you really do need the entity manager then you can make a service definition:

# services.yaml
AppBundle\Service\HilaService:
    $entityManager: '@doctrine.orm.ps_entity_manager'

最后，如果您不想闲逛这些东西，可以注入ManagerRegistry并从中获取所需的东西。

Finally, if you don't want to fool around with any of this stuff you can inject the ManagerRegistry and pull what you need from it.

class HilaService
{
    public function __construct(Doctrine\Common\Persistence\ManagerRegistry $managerRegistry)
    {
        $em = $managerRegistry->getManager('ps'); // or getConnection()

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