Symfony4 加载类自定义文件夹时出错 "Expected to find class... but it was not found"

Question

问题

我正在尝试设置自定义目录结构对于我的 Symfony 项目中的一些共享 classes。我想在我的根目录中创建一个自定义文件夹项目，我想使用 Symfony 自动加载自动注册服务的功能那个文件夹。

所以我向 services.yaml 文件：

# src ./config/services.yaml
services:
    ...

    TestNamespace\:
    resource: '../TestNamespace/*'

  ...

并且我在自定义文件夹中添加了一个空 class:

# src ./TestNamespace/TestClass.php

namespace TestNamespace;

class TestClass
{

}

当我运行应用程序时，出现以下错误：

(1/2) InvalidArgumentException
Expected to find class "TestNamespace\TestClass" in file 
"/path/to/ClassLoadErrorDemo/demo/TestNamespace/TestClass.php"
while importing services from resource 
"../TestNamespace/*", but it was not found! Check the
namespace prefix used with the resource.

(2/2) FileLoaderLoadException
Expected to find class "TestNamespace\TestClass" in file 
"/path/to/ClassLoadErrorDemo/demo/TestNamespace/TestClass.php" while 
importing services from resource "../TestNamespace/*", but it was not 
found! Check the namespace prefix used with the resource in 
/path/to/ClassLoadErrorDemo/demo/config/services.yaml (which is loaded 
in resource "/path/to/ClassLoadErrorDemo/demo/config/services.yaml").

我仔细检查了路径、命名空间和 class 多次命名，一切似乎都很好，我不明白为什么我仍然收到错误。 ./src 文件夹中的控制器似乎加载正常。我在这里做错了什么？

重现步骤

我创建了一个演示存储库来隔离问题。

git clone https://github.com/smoelker/SymfonyClassLoadErrorDemo.git
cd SymfonyClassLoadErrorDemo/demo
composer install
mv TestNamespace/TestClass.php_ TestNamespace/TestClass.php
php bin/console server:start

Answer 1

更新您的 composer.json 自动加载设置

{
    [...]
    "autoload": {
        "psr-4": {
            "TestNamespace\": "TestNamespace/",
            "": "src/"
        }
    },
    [...]
}

在运行之后：composer dump-autoload 再试一次。

Answer 2

composer dump-autoload --classmap-authoritative 仅当您 src 目录在您运行命令时存在时才有效。

这可能是多阶段 Docker 构建的一个问题，尤其是当您通常只将 composer.json/composer.lock 复制到构建映像中时。

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