Php 获得；“类不存在”；在Laravel 5.x中

我得到一个错误：

Class-App\Http\Controllers\TranslatorService不存在

，无论名称空间在控制器中设置是否正确，文件是否位于正确位置

route.php：

Route::group(['prefix' => 'api', 'middleware' => 'response-time'], function     () {
    Route::group(['prefix' => 'v1'], function () {
        Route::get('/', function () {
            App::abort(404);
        });

        Route::resource('accounts', 'AccountController');
    });

    Route::group(['prefix' => 'v2'], function () {
        Route::get('/', function () {
            App::abort(501, 'Feature not implemented');
        });
    });
});

app/comdexsolutions/Http/Controllers

下的

AccountController.php

是标准的骨架控制器

TranslationService.php

与

AccountController

位于同一路径下，如下所示：

<?php

namespace ComdexxSolutions\Http\Controllers;

use InvalidArgumentException;
use RuntimeException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class TranslatorService
{
    /**
     * Returns a class name base on a resource mapping.
     * The mapping comes from a config file (api.php).
     *
     * Example: `users` should return `\App\Models\User`
     *
     * @param string $resource
     * @return string
    * @throws NotFoundHttpException
     */
    public function getClassFromResource($resource)
    {
        // This is the models namespace
        $modelsNamespace = Config::get('api.models_namespace',     Config::get('api.app_namespace'));

        // This array contains mapping between resources and Model classes
        $mapping = Config::get('api.mapping');

        if (!is_array($mapping)) {
            throw new RuntimeException('The config api.mapping needs to be an array.');     
         }

        if (!isset($mapping[$resource])) {
             throw new NotFoundHttpException;
         }

        return implode('\\', [$modelsNamespace, $mapping[$resource]]);
    }

    /**
     * Returns a command class name based on a resource mapping.
     *
     * Examples:
     *     - getCommandFromResource('users', 'show') returns     \App\Commands\UserCommand\ShowCommand
     *     - getCommandFromResource('users', 'index', 'groups') returns     \App\Commands\UserCommand\GroupIndexCommand
     *
     * @param string $resource
     * @param string $action
     * @param string|null $relation
     * @return string
     * @throws NotFoundHttpException
     */
     public function getCommandFromResource($resource, $action, $relation = null)
    {
        $namespace = Config::get('api.app_namespace');
        $mapping = Config::get('api.mapping');

        // If the mapping does not exist, we consider this as a 404 error
        if (!isset($mapping[$resource])) {
            throw new NotFoundHttpException('The resource [' . $resource . '] is not mapped to any Model.');
        }

        $allowedActions = ['index', 'store', 'show', 'update', 'destroy'];

        if (!in_array($action, $allowedActions)) {
            throw new InvalidArgumentException('[' . $action . '] is not a valid action.');
        } 

        // If we have a $relation parameter, then we generate a command based on it
        if ($relation) {
            if (!isset($mapping[$relation])) {
                throw new NotFoundHttpException('The resource [' . $resource . '] is not mapped to any Model.');
            }

            $command = implode('\\', [
                $namespace,
                'Commands',
                $mapping[$resource] . 'Command',
                ucfirst($mapping[$relation]) . ucfirst($action) . 'Command'
            ]);
        } else {
            $command = implode('\\', [
                $namespace,
                'Commands',
                $mapping[$resource] . 'Command',
                ucfirst($action) . 'Command'
             ]);
         }

        // If no custom command is found, then we use one of the default ones
        if (!class_exists($command)) {
             if ($relation) {
                 $command = implode('\\', [
                    'ComdexxSolutions',
                    'Console',
                    'Commands',
                    'DefaultCommand',
                    'Relation' . ucfirst($action) . 'Command'
                 ]);
             } else {
                 $command = implode('\\', [
                     'ComdexxSolutions',
                     'Console',
                     'Commands',
                     'DefaultCommand',
                     ucfirst($action) . 'Command'
                     ]);
                   }
                 }

        if (!class_exists($command)) {
            throw new NotFoundHttpException('There is no default command for this action and resource.');
        }

        return $command;
    }
}

---

只是对这一点的快速跟进-我在IRC上帮助了这个用户，最后我们做了一个webex。根本原因是与上面发布的文件完全不同的文件

在controller.php中调用了
TranslatorService
，但控制器找不到正确的命名空间。因此出现了错误

查找起来有点困难，因为错误没有标记为来自controller.php

发布问题的用户最终在整个项目中对TranslatorService进行了全局搜索，我们查看了找到问题的每个文件，直到找到问题

如果您阅读本文是因为您有类似的错误，请记住以下提示：

类不存在
-通常表示您试图使用代码中找不到的内容。它可能拼写错误，但更常见的是，它是名称空间的问题

如果你有这个错误——搜索所有东西的技术是一个很好的方法，如果它不是很明显的话

他的
comdexsolutions
是
app
文件夹，我想你可以试试这个：
php-artisan-dump-autoload
或
composer-dump-autoload
。如果这不起作用，可能类
TranslatorService
需要扩展
controller
您说过您的文件名为TranslationService.php，但您的类是TranslatorService。您是否尝试过将文件重命名为与类相同的名称？我想主要是在composer.json中没有更新新类时发生的。如果您确定使用的名称空间是正确的，请检查此答案。
vagrant@homestead:~/Code/comdexx-solutions-dcas$ tree -L 2 app
app
├── ComdexxSolutions
│   ├── Billing
│   ├── Console
│   ├── Contracts
│   ├── DbCustomer.php
│   ├── Events
│   ├── Exceptions
│   ├── Facades
│   ├── Http
│   ├── InvokeUser.php
│   ├── Jobs
│   ├── Listeners
│   ├── Models
│   ├── Providers
│   ├── Repositories
│   ├── Search
│   ├── Services
│   ├── spec
│   ├── Traits
│   ├── Transformers
│   └── Views
├── Console
│   ├── Commands
│   └── Kernel.php
├── Entities
├── Events
│   └── Event.php
├── Exceptions
│   └── Handler.php
├── Http
│   ├── Controllers
│   ├── Kernel.php
│   ├── Middleware
│   ├── Requests
│   └── routes.php
├── Jobs
│   └── Job.php
├── Listeners
├── Modules
├── Providers
│   ├── AppServiceProvider.php
│   ├── ErrorServiceProvider.php
│   ├── EventServiceProvider.php
│   └── RouteServiceProvider.php
├── Repositories
└── User.php

33 directories, 13 files