我正在学习 Symfony 框架，并尝试使用 Git 将我放在一起的简单样板应用程序部署到 Heroku。

由于以下 fatal error ，部署失败:

未捕获的 Symfony\Component\Debug\Exception\ClassNotFoundException:尝试从命名空间“Symfony\Bundle\WebServerBundle”加载类“WebServerBundle”

您是否忘记了另一个命名空间的“use”语句？在/tmp/build_cbeb92af6c9ee04b07e1f85618211649/src/Kernel.php:32

内核.php

<?php

namespace App;

use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;

class Kernel extends BaseKernel {

    use MicroKernelTrait;

    const CONFIG_EXTS = '.{php,xml,yaml,yml}';

    public function getCacheDir(){

        return $this->getProjectDir().'/var/cache/'.$this->environment;
    }

    public function getLogDir(){

        return $this->getProjectDir().'/var/log';
    }

    public function registerBundles(){

        $contents = require $this->getProjectDir().'/config/bundles.php';
        foreach ($contents as $class => $envs) {
            if (isset($envs['all']) || isset($envs[$this->environment])) {
                yield new $class();
            }
        }
    }

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader){

        $container->setParameter('container.autowiring.strict_mode', true);
        $container->setParameter('container.dumper.inline_class_loader', true);
        $confDir = $this->getProjectDir().'/config';
        $loader->load($confDir.'/packages/*'.self::CONFIG_EXTS, 'glob');
        if (is_dir($confDir.'/packages/'.$this->environment)) {
            $loader->load($confDir.'/packages/'.$this->environment.'/**/*'.self::CONFIG_EXTS, 'glob');
        }
        $loader->load($confDir.'/services'.self::CONFIG_EXTS, 'glob');
        $loader->load($confDir.'/services_'.$this->environment.self::CONFIG_EXTS, 'glob');
    }

    protected function configureRoutes(RouteCollectionBuilder $routes){

        $confDir = $this->getProjectDir().'/config';
        if (is_dir($confDir.'/routes/')) {
            $routes->import($confDir.'/routes/*'.self::CONFIG_EXTS, '/', 'glob');
        }
        if (is_dir($confDir.'/routes/'.$this->environment)) {
            $routes->import($confDir.'/routes/'.$this->environment.'/**/*'.self::CONFIG_EXTS, '/', 'glob');
        }
        $routes->import($confDir.'/routes'.self::CONFIG_EXTS, '/', 'glob');
    }
}

到目前为止我做了什么:

• 安装dotenv 包(composer 需要symfony/dotenv)
• 运行 composer dump-autoload
• 根据 this article 通过 heroku CLI 设置生产环境变量(heroku config:set SYMFONY_ENV=prod)

我学到/注意到的一些事情:

• 根据 WebServerBundle 的自述文件:

WebServerBundle provides commands for running applications using the PHP built-in web server. It simplifies your local development setup because you don't have to configure a proper web server such as Apache or Nginx to run your application.

.. 也就是说，WebServerBundle 是开发依赖项 - 但它已包含在生产中。

• WebServerBundle 也包含在自动加载下的 composer.lock 文件中

  “自动加载”:{ “psr-4”:{ “Symfony\\Bundle\\WebServerBundle\\”:“” }, ... },

• 我的 bundles.php 文件包含 WebServerBundle for dev

  返回[ Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true], Symfony\Bundle\WebServerBundle\WebServerBundle::class => ['dev' => true], Symfony\Bundle\WebProfilerBundle\WebProfilerBundle::class => ['dev' => true, 'test' => true], Symfony\Bundle\TwigBundle\TwigBundle::class => ['all' => true], Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle::class => ['all' => true], ];

• 我有一个 .env 文件和一个 .env.dist 文件 - 我假设 .env.dist 文件是生产？它们都具有相同的内容:

  APP_ENV=dev APP_SECRET=0473d15a4ce2723619d2e8b0405186d3

我是 symfony 的新手，除了 dotenv 包读取 .env 文件并设置环境变量外，我并不真正了解如何实例化生产环境。

任何帮助和澄清所有这一切将不胜感激。

编辑:这是我的 composer.json 文件

{
    "type": "project",
    "license": "proprietary",
    "require": {
        "php": "^7.1.3",
        "ext-iconv": "*",
        "sensio/framework-extra-bundle": "^5.1",
        "symfony/asset": "^4.0",
        "symfony/console": "^4.0",
        "symfony/dotenv": "^4.0",
        "symfony/flex": "^1.0",
        "symfony/framework-bundle": "^4.0",
        "symfony/lts": "^4@dev",
        "symfony/twig-bundle": "^4.0",
        "symfony/yaml": "^4.0"
    },
    "require-dev": {
        "symfony/profiler-pack": "^1.0",
        "symfony/web-server-bundle": "^4.0"
    },
    "config": {
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-apcu": "*",
        "symfony/polyfill-php70": "*",
        "symfony/polyfill-php56": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install --symlink --relative %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "id": "01C1BVQJ19BG3WAS3299PDHH9P",
            "allow-contrib": false
        }
    }
}

最佳答案

我不确定你用的是什么命令，(我用的是git)

heroku config:set SYMFONY_ENV=prod

但是如果你的 .env 文件有

APP_ENV=dev

这是明确地将环境设置为开发，因此它试图加载开发依赖项(由您的错误证明)，这些依赖项不会被推送到服务器(阅读您提供的文章)。

您需要服务器上的 .env 文件具有 APP_ENV=prod .env 是针对特定机器的，它会被 git 忽略，而 .env.dist 会被跟踪。所以编辑 .env.dist 并提交它，一旦它在服务器上，只需重命名它 .env 然后我将运行 composer install或服务器上的 composer update 将更新依赖项并清除缓存。然后刷新浏览器。

关于php - 部署 Symfony 应用程序 - ClassNotFoundException 错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48967481/