包创建后的 Symfony3 ClassNotFoundException

问题描述

我想在 Symfony 中开始一个新的 3.3 项目并照常开始:

I wanted to start a new 3.3 project in Symfony and started as usual:

1.) 创建新项目:symfony new ArtProject

2.) 创建一个新的 Bundle:php app/console generate:bundle (Paul/ArtBundle, yml, src/)

2.) Creating a new Bundle: php app/console generate:bundle (Paul/ArtBundle, yml, src/)

然后我运行本地服务器，当我打开 127.0.0.1:8000 时，我收到了这条美丽的消息:

Then I run the local server and when I open 127.0.0.1:8000 I get this beautiful message:

(1/1) ClassNotFoundException

尝试从命名空间加载类PaulArtBundle"保罗艺术包".您是否忘记了另一个的使用"语句命名空间?在 AppKernel.php(第 19 行)

Attempted to load class "PaulArtBundle" from namespace "PaulArtBundle". Did you forget a "use" statement for another namespace? in AppKernel.php (line 19)

这很奇怪，到目前为止我还没有弄清楚为什么会发生这种情况.在创建 Bundle 之前，没有错误；我看到了 symfony 的典型起始页.

Which is strange and I haven't figured out why this happen so far. Before creating the Bundle, there was no error; I saw the typical startpage of symfony.

public function registerBundles()
{
    $bundles = [
        new SymfonyBundleFrameworkBundleFrameworkBundle(),
        ......
        new SensioBundleFrameworkExtraBundleSensioFrameworkExtraBundle(),
        new AppBundleAppBundle(),
        new PaulArtBundlePaulArtBundle(),
    ];
}

<?php

namespace PaulArtBundle;

use SymfonyComponentHttpKernelBundleBundle;

class PaulArtBundle extends Bundle
{
}

知道那里发生了什么吗?我没有改变任何东西，我只运行了这些命令.

Any idea whats going on there? I did not change a thing, I only ran these commands.

推荐答案

我刚刚安装了 S3.3.4(撰写本文时的最新版本)的新副本，使用:

I just installed a fresh copy of S3.3.4 (latest version as of this writing) using:

composer create-project symfony/framework-standard-edition s334 "3.3.4"
bin/console generate:bundle
Share across multiple apps: yes
namespace: PaulArtBundle
bundle name: PaulArtBundle
Target Directory: src/

刷新浏览器，果然我收到了未找到课程的消息.

Refreshed the browser and sure enough I got the class not found message.

当引入新的命名空间时， generate:bundle 命令不会更新 composer.json 的自动加载部分.编辑 composer.json 并:

The generate:bundle command is not updating the autload section of composer.json when a new namespace is introduced. Edit composer.json and:

# composer.json
"autoload": {
    "psr-4": {
        "AppBundle\": "src/AppBundle",
        "Paul\": "src/Paul"
    },
    "classmap": [ "app/AppKernel.php", "app/AppCache.php" ]
},

然后运行

composer dumpautoload

然后重启服务器(也许).那应该解决 bundle class not found 问题.

And restart the server(maybe). That should fix the bundle class not found problem.

自从标准将所有内容都放在 AppBundle 下以来，我已经有一段时间没有使用 generate:bundle 命令了，所以我不知道这已经破坏"了多久.但至少在上周左右的三个问题表明这是最近的事情.

I have not used the generate:bundle command is quite some time ever since the standard was to put everything under AppBundle so I don't know how long this has been "broken". But at least three questions in the last week or so indicates it was something recent.

顺便说一句，当我刷新浏览器时，我得到了Hello World"，这让我有点困惑.事实证明，新包覆盖了/路由，这也有点特殊.

And by the way, when I refreshed the browser I got "Hello World" which threw me for a bit. Turns out the new bundle overrides the / route which is also sort of special.

如果有人想知道为什么会发生这种情况，Symfony 3.2 已从

And in case anybody is wondering why this started happening, Symfony 3.2 changed from

#composer.json
"psr-4": { "": "src/" },
To
"psr-4": { "AppBundle\": "src/AppBundle" },

尽管我认为拼写单个命名空间可能更好"，但您始终可以将其改回来.不确定.

You could always just change it back though I think spelling out individual namespaces might be "better". Not sure.

这里有一个更详细的问题:https://github.com/symfony/symfony-standard/issues/1098

And here is an issue with more details: https://github.com/symfony/symfony-standard/issues/1098

与破坏现有命令相比，维护者似乎更喜欢微小的速度改进.那好吧.Symfony Flex 应该让一切都变得更好.

Looks like the maintainer favored a tiny speed improvement over breaking an existing command. Oh well. Symfony Flex is supposed to make everything great again.

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