函数`LoginFormAuthenticator :: __ construct`的参数太少，0恰好传递了4个预期值

问题描述

需要连接到多个数据库，并遵循Symfony文档中的内容。

我创建了多个原则连接和orm实体管理器，并禁用了自动装配。

# config/packages/doctrine.yaml
doctrine:
  dbal:
    default_connection: default
    connections:
      default:
        # configure these for your database server
        url: "%env(resolve:DATABASE_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4
      lc_cvo:
        # configure these for your database server
        url: "%env(resolve:DATABASE_LC_CVO_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4
      lc_cvt:
        # configure these for your database server
        url: "%env(resolve:DATABASE_LC_CVT_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4
      lc_ewi:
        # configure these for your database server
        url: "%env(resolve:DATABASE_LC_EWI_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4
      lc_tbo:
        # configure these for your database server
        url: "%env(resolve:DATABASE_LC_TBO_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4
      lc_users:
        # configure these for your database server
        url: "%env(resolve:DATABASE_LC_USERS_URL)%"
        driver: "pdo_MysqL"
        server_version: "5.7"
        charset: utf8mb4

orm:
    entity_managers:
      default:
        connection: default
        mappings:
          Main:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_lemoncake"
            prefix: 'App\Entity\lmc_lemoncake'
            alias: Main
      lc_cvo:
        connection: lc_cvo
        mappings:
          lc_cvo:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_lemoncake-cvo"
            prefix: 'App\Entity\lmc_lemoncake_cvo'
            alias: lc_cvo
      lc_cvt:
        connection: lc_cvt
        mappings:
          lc_cvt:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_lemoncake-cvt"
            prefix: 'App\Entity\lmc_lemoncake_cvt'
            alias: lc_cvt
      lc_ewi:
        connection: lc_ewi
        mappings:
          lc_ewi:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_lemoncake-ewi"
            prefix: 'App\Entity\lmc_lemoncake_ewi'
            alias: lc_ewi
      lc_tbo:
        connection: lc_tbo
        mappings:
          lc_tbo:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_lemoncake-tbo"
            prefix: 'App\Entity\lmc_lemoncake_tbo'
            alias: lc_tbo
      lc_users:
        connection: lc_users
        mappings:
          lc_users:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_users"
            prefix: 'App\Entity\lmc_users'
            alias: lc_users

我的services.yaml文件如下

# This file is the entry point to configure your own services.
# Files in the packages/ subdirectory configure your dependencies.

# Put parameters here that don't need to change on each machine where the app is deployed
# https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration
parameters:

services:
  # default configuration for services in *this* file
  _defaults:
    autowire: false # Automatically injects dependencies in your services.
    autoconfigure: true # Automatically registers your services as commands,event subscribers,etc.

  # makes classes in src/ available to be used as services
  # this creates a service per class whose id is the fully-qualified class name
  App\:
    resource: "../src/"
    exclude:
      - "../src/DependencyInjection/"
      - "../src/Entity/"
      - "../src/Kernel.PHP"
      - "../src/Tests/"

  # controllers are imported separately to make sure services can be injected
  # as action arguments even if you don't extend any base controller class
  App\Controller\:
    resource: "../src/Controller/"
    tags: ["controller.service_arguments"]

  # add more service deFinitions when explicit configuration is needed
  # please note that last deFinitions always *replace* prevIoUs ones

很遗憾，尝试访问登录页面时出现以下错误。

Too few arguments to function App\Security\LoginFormAuthenticator::__construct(),0 passed in /var/www/html/app/var/cache/dev/Container12fc4el/getSecurity_Firewall_Map_Context_MainService.PHP on line 53 and exactly 4 expected

它所引用的LoginFormAuthenticator在此处列出，并且需要连接到用户信息（用户名，pw）所在的lc_users连接。我将需要其他连接来获取客户端数据。

class LoginFormAuthenticator extends AbstractformLoginAuthenticator implements PasswordAuthenticatedInterface
{
    use TargetPathTrait;

    public const LOGIN_ROUTE = 'app_login';

    private $entityManager;
    private $urlGenerator;
    private $csrftokenManager;
    private $passwordEncoder;

    public function __construct(EntityManagerInterface $entityManager,UrlGeneratorInterface $urlGenerator,CsrftokenManagerInterface $csrftokenManager,UserPasswordEncoderInterface $passwordEncoder)
    {
        $this->entityManager = $entityManager;
        $this->urlGenerator = $urlGenerator;
        $this->csrftokenManager = $csrftokenManager;
        $this->passwordEncoder = $passwordEncoder;
    }

我认为我需要在服务中添加一些内容，以便身份验证器可以检索正确的连接，很遗憾，我对此事的了解还不够。

我需要为多个客户端使用多个数据库。

如何解决当前问题？
如何防止其他连接出现此问题？
我是否以正确的方式处理此问题，还是有更好的方法来连接多个数据库？

在此先感谢您的帮助，随时询问更多信息。

编辑：感谢@msg的回答；我设法通过以下代码使其工作：

app / config / services.yaml：

App\Security\LoginFormAuthenticator:
    autowire: true
    tags: ["doctrine.repository_service"]
    arguments:
      $entityManager: "@doctrine.orm.lc_users_entity_manager"

app / config / doctrine.yaml：

  orm:
    default_entity_manager: default
    entity_managers:
      auto_generate_proxy_classes: "%kernel.debug%"
      auto_mapping: true
      default:
         ...

      lc_users:
        connection: lc_users
        mappings:
          App\Entity\lmc_lemoncake:
            is_bundle: false
            type: annotation
            dir: "%kernel.project_dir%/src/Entity/lmc_users"
            prefix: 'App\Entity\lmc_users'
            alias: lc_users

LoginFormAuthenticator的getUser函数（的一部分）：

$em = $this->entityManager;
$repo = $em->getRepository(Users::class,'lc_users');
$user = $repo->findOneBy(['username' => $credentials['username']]);

解决方法

如前所述，注入EntityManager将使您得到default。原则将为每个经理注册一项服务，名称为doctrine.orm.%manager_name%_entity_manager。

因此，如果您需要其他选项，则有几种选择：

1。。明确配置服务以使用所需的管理器：

services:
    App\Security\LoginFormAuthenticator: 
        arguments:
            # Override the Manager,other arguments will be autowired.
            $entityManager: '@doctrine.orm.lc_users_entity_manager'

2。。为不同的实体管理者创建不同的bindings：

_defauts:
    bind:
        $cvoManager: '@doctrine.orm.lc_cvo_entity_manager'
        $usersManager: '@doctrine.orm.lc_users_entity_manager'
        # Other managers...

根据依赖项上的变量名称，将注入适当的管理器：

public function __construct(
    EntityManagerInterface $entityManager,// Default manager
    EntityManagerInterface $usersManager,)

3。。如果您有很多依赖项，还可以注入ManagerRegistry（调用AbstractController时在getDoctrine()中获得的对象）。它充当服务定位器，您可以在其中retrieve managers or repositories：

    use Doctrine\Persistence\ManagerRegistry;

    public function __construct(ManagerRegistry $registry) {
        $userManager = $registry->getManager('users');
    }

如果您有许多具有不同依赖项的服务，则第一个选项很快就会变得笨拙；如果需要模拟注册表，第三个选项将掩盖您的真实依赖项并使测试复杂化。

authenticator orm orm service service service symfony symfony