php - 无法在 Symfony 中使用 Autowiring 获取 Doctrine EntityManager

Question

好吧，我要疯了，Symfony (3.3) Autowiring 有一些我无法理解的东西。我读过这些资源: http://symfony.com/doc/current/service_container.html http://symfony.com/doc/current/service_container/3.3-di-changes.html以及其他我无法发布的内容，因为我需要 10 个声望。我也读过很多文章/stackoverflow 帖子，但没有运气。

我已尝试设置我的服务，它几乎可以正常工作，只是 EntityManager 为空，所以我无法对其调用 ->getRepository()。错误发生在我工厂这样的线上:

$databaseTournament = $this->em->getRepository('AppBundle:Tournament')
    ->find($tournament);

"Call to a member function getRepository() on null"

它似乎正确地找到了服务，但从未在工厂中注入(inject) EntityManager。我试图在 services.yml 中明确配置一些东西，但我从来没有设法让它工作。

从昨天开始我就想弄明白了，但我真的很困惑。你可以帮帮我吗 ？先感谢您 ! :)

这是我的文件:

服务.yml:

parameters:
services:
    _defaults:
        autowire: true
        autoconfigure: true
        public: false
    AppBundle\:
        resource: '../../src/AppBundle/*'
        exclude: '../../src/AppBundle/{Entity,Repository,Tests}'
    AppBundle\Controller\:
        resource: '../../src/AppBundle/Controller'
        public: true
        tags: ['controller.service_arguments']

入口工厂:

<?php
namespace AppBundle\Factory;

use AppBundle\Entity\Entry;
use AppBundle\Entity\Team;
use AppBundle\Entity\Tournament;
use AppBundle\Exception\InvalidEntryArgumentException;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\EntityNotFoundException;

class EntryFactory
{
    private $em;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
    }

    public function createEntry($tournament, $team, $eliminated = false)
    {
        $entry = new Entry();

        if ($tournament instanceof Tournament) {
            $entry->setTournament($tournament);
        }
        elseif (is_int($tournament) && $tournament >= 0) {
            $databaseTournament = $this->em->getRepository('AppBundle:Tournament')->find($tournament);
            if (is_null($databaseTournament)) {
                throw new EntityNotFoundException('Tournament (id:'.$tournament.') not found.');
            }
            else {
                $entry->setTournament($databaseTournament);
            }
        }
        else {
            throw new InvalidEntryArgumentException('Could not determine the Tournament argument.');
        }

        if ($team instanceof Team) {
            $entry->setTeam($team);
        }
        elseif (is_int($team) && $team >= 0) {
            $databaseTeam = $this->em->getRepository('AppBundle:Team')->find($team);
            if (is_null($databaseTeam)) {
                throw new EntityNotFoundException('Team (id:'.$team.') not found.');
            }
            else {
                $entry->setTeam($databaseTeam);
            }
        }
        else {
             throw new InvalidEntryArgumentException('Could not determine the Team argument.');
        }


        $entry->setEliminated($eliminated);
        return $entry;
    }
}

入口 Controller :

<?php

namespace AppBundle\Controller;

use AppBundle\Entity\Entry;
use Doctrine\ORM\EntityNotFoundException;
use FOS\RestBundle\Controller\Annotations as Rest;
use FOS\RestBundle\Controller\FOSRestController;
use FOS\RestBundle\View\View;
use Nelmio\ApiDocBundle\Annotation\ApiDoc;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Validator\ConstraintViolationList;
use AppBundle\Factory;

class EntryController extends FOSRestController
{
    /**
     * @ApiDoc(
     *     resource=true,
     *     section="Entries",
     *     description="Creates a new entry.",
     *     statusCodes={
     *          201="Returned when created.",
     *          400="Returned when a violation is raised by validation.",
     *          404="Returned when a team or a tournament is not found."
     *     }
     * )
     *
     * @Rest\Post(
     *     path="/entries",
     *     name="app_entry_create"
     * )
     * @Rest\View(statusCode=201)
     * @Rest\RequestParam(
     *     name="tournamentId",
     *     requirements="\d+",
     *     nullable=false,
     *     description="The id of the tournament in which the team enters."
     * )
     * @Rest\RequestParam(
     *     name="teamId",
     *     requirements="\d+",
     *     nullable=false,
     *     description="The id of the team entering the tournament."
     * )
     *
     * @param $tournamentId
     * @param $teamId
     * @param ConstraintViolationList $violationList
     * @param Factory\EntryFactory $entryFactory
     * @return Entry|View
     * @throws EntityNotFoundException
     * @internal param $id
     * @internal param Entry $entry
     */
    public function createEntryAction($tournamentId, $teamId, ConstraintViolationList $violationList,
                                      Factory\EntryFactory $entryFactory)
    {
        if (count($violationList)) {
            return $this->view($violationList, Response::HTTP_BAD_REQUEST);
        }
        $entry = $entryFactory->createEntry($tournamentId,$teamId);
        $em->persist($entry);
        $em->flush();
        return $entry;
    }
}

编辑:

我必须补充一点，我已经尝试过了，但它也不起作用:

在services.yml中:

AppBundle\Factory\EntryFactory:
    public: true
    arguments: ['@doctrine.orm.entity_manager']

在 EntryFactory 中:

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

编辑 2:

我也试过禁用所有新的:仍然是同样的错误

AppBundle\Factory\EntryFactory:
        autowire: false
        autoconfigure: false
        public: true
        arguments:
            $em: '@doctrine.orm.entity_manager'

与禁用默认配置中的文件夹相同:

AppBundle\:
        resource: '../../src/AppBundle/*'
        exclude: '../../src/AppBundle/{Entity,Repository,Tests,Factory}'

Answer 1

强制的替代方法 autowiring Dependency Injection in Symfony 3.3或更高版本，而不必为每个服务显式定义实体管理器。您可以添加 an alias of the desired entity manager service .

#app/config/services.yml
services:
    _defaults:
        autowire: true
        autoconfigure: true
        public: false

    AppBundle\:
        resource: '../../src/AppBundle/*'
        exclude: '../../src/AppBundle/{Entity,Repository,Tests}'

    AppBundle\Controller\:
        resource: '../../src/AppBundle/Controller/*'
        public: true
        tags: ['controller.service_arguments']

    Doctrine\ORM\EntityManagerInterface: '@doctrine.orm.entity_manager'

   #custom services below here
   #...

这将允许 Symfony 将 Doctrine\ORM\EntityManagerInterface 确定为您要注入(inject)的服务。

use Doctrine\ORM\EntityManagerInterface;

class EntryFactory
{
    private $em;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
    }
    
    //...
}

最终结果将在您的服务配置中为:

return $this->services['AppBundle\Factory\EntryFactory'] = new \AppBundle\Factory\EntryFactory(${($_ = isset($this->services['doctrine.orm.default_entity_manager']) ? $this->services['doctrine.orm.default_entity_manager'] : $this->load('getDoctrine_Orm_DefaultEntityManagerService.php')) && false ?: '_'});

Note: Be sure to warmup your Symfony cache to ensure new servicedeclarations are created.

php composer.phar install

or

php composer.phar install --no-scripts
php bin/console --env=dev cache:clear --no-warmup
php bin/console --env=dev cache:warmup