Symfony 4 - 来自自定义捆绑包的服务不起作用答案

【问题标题】：Symfony 4 - services from custom bundle not workingSymfony 4 - 来自自定义捆绑包的服务不起作用
【发布时间】：2019-12-13 17:48:48
【问题描述】：

我将 symfony 3 迁移到 symfony 4.3，并且我的自定义包移动到：src/Bundles/FooBundle。

结构 FooBundle： - 依赖注入 - 配置.php - FooExtension.php - 事件 - 模型 - 资源 - 配置 - 服务.yml - 服务 - 树枝 - 例外 - FooBundle.php

还有文件 Bundles/FooBundle/Resources/config/servies.yaml

services:
  foo:
    class: App\Bundles\FooBundle\Service\Foo
    arguments:
      - '%foo.argument1%'
      - '%foo.argument2%'
      - '%foo.argument3%'
  foo.listener.example:
    class: App\Bundles\FooBundle\Event\Listener\ExampleListener
    arguments: ['@annotations.reader']
    tags:
      - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }
  foo.filter:
    class: App\Bundles\FooBundle\Filter\FilterConverter
    tags:
      - { name: request.param_converter }

Bundles/FooBundle/DependencyInjection/Configuration.php

<?php

namespace App\Bundles\FooBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    /**
     * {@inheritdoc}
     */
    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder('foo');
        $treeBuilder->getRootNode()
            ->children()
            ->scalarNode('argument1')->isRequired()->end()
            ->scalarNode('argument2')->isRequired()->end()
            ->scalarNode('argument3')->isRequired()->end()
            ->end();

        return $treeBuilder;
    }
}

Bundles/FooBundle/DependencyInjection/FooExtension.php

<?php

namespace App\Bundles\FooBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\Loader;

/**
 * This is the class that loads and manages your bundle configuration.
 *
 * @link http://symfony.com/doc/current/cookbook/bundles/extension.html
 */
class FooExtension extends Extension
{
    /**
     * {@inheritdoc}
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $container->setParameter('foo.argument1', $config['page_field_name']);
        $container->setParameter('foo.argument2', $config['per_page_field_name']);
        $container->setParameter('foo.argument3', $config['sort_field_name']);

        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
        $loader->load('services.yml');
    }
}

并捆绑注册：config/bundles.php

App\Bundles\FooBundle\FooBundle::class => ['all' => true],

配置包：

config/packages/foo.yam

foo:
  argument1: test1
  argument2: test2
  argument3: test3

完成...运行应用程序并出现错误：无法自动装配服务“App\Bundles\FooBundle\Service\Foo”：方法“__construct()”的参数“$argument1”没有类型提示，您应该明确配置其值。

但是，当我在 config/services.yaml 中添加 conf 时：

App\Bundles\FooBundle\Service\Foo:
  arguments:
    - '%foo.argument1%'
    - '%foo.argument2%'
    - '%foo.argument3%'

那个工作...

问题：为什么捆绑服务不起作用？

【问题讨论】：

标签： symfony service bundle symfony4

【解决方案1】：

我猜问题是 symfony 中的默认配置为 App 命名空间下的所有类添加了自动装配。

查看config/services.yml下的配置：

services:
    # default configuration for services in *this* file
    _defaults:
        autowire: true      # 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,Entity,Migrations,Tests,Kernel.php}'

您可以删除这些行：

    App\:
        resource: '../src/*'
        exclude: '../src/{DependencyInjection,Entity,Migrations,Tests,Kernel.php}'

问题应该会消失。

【讨论】：