php - '在插件管理器 Zend\Router\RoutePluginManager 中找不到名为 "Example\Segment"的插件

Question

我目前正在学习 Zend 3 教程。唯一的区别是我使用的是示例表/类而不是相册。一切似乎都符合规范，除了我每次尝试访问开发服务器时都会收到以下错误:

Fatal error: Uncaught exception 'Zend\ServiceManager\Exception\ServiceNotFoundException' with message 'A plugin by the name "Example\Segment" was not found in the plugin manager Zend\Router\RoutePluginManager' in C:\Websites\ZEND2\vendor\zendframework\zend-servicemanager\src\AbstractPluginManager.php:133 Stack trace: #0 C:\Websites\ZEND2\vendor\zendframework\zend-router\src\SimpleRouteStack.php(280): Zend\ServiceManager\AbstractPluginManager->get('Example\Segment', Array) #1 C:\Websites\ZEND2\vendor\zendframework\zend-router\src\Http\TreeRouteStack.php(201): Zend\Router\SimpleRouteStack->routeFromArray(Array) #2 C:\Websites\ZEND2\vendor\zendframework\zend-router\src\Http\TreeRouteStack.php(151): Zend\Router\Http\TreeRouteStack->routeFromArray(Array) #3 C:\Websites\ZEND2\vendor\zendframework\zend-router\src\SimpleRouteStack.php(142): Zend\Router\Http\TreeRouteStack->addRoute('example', Array) #4 C:\Websites\ZEND2\vendor\zendframework\zend-router\src\SimpleRouteStack.php(86): Zend\Router\SimpleRouteStack->addRoutes(Array) in C:\Websites\ZEND2\vendor\zendframework\zend-servicemanager\src\AbstractPluginManager.php on line 133

ExampleController.php

namespace Example\Controller;

use Example\Model\ExampleTable;
use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;

class ExampleController extends AbstractActionController
{
    private $table;

    public function indexAction()
    {
        return new ViewModel([
            'examples' => $this->table->fetchAll(),
        ]);
    }

    public function addAction()
    {
    }

    public function editAction()
    {
    }

    public function deleteAction()
    {
    }

     public function __construct(ExampleTable $table)
    {
        $this->table = $table;
    }
}

ExampleTable.php

<?php 

namespace Example\Model;

use RuntimeException;
use Zend\Db\TableGateway\TableGatewayInterface;

class ExampleTable
{
    private $tableGateway;

    public function __construct(TableGatewayInterface $tableGateway)
    {
        $this->tableGateway = $tableGateway;
    }

    public function fetchAll()
    {
        return $this->tableGateway->select();
    }

    public function getExample($id)
    {
        $id = (int) $id;
        $rowset = $this->tableGateway->select(['id' => $id]);
        $row = $rowset->current();
        if (! $row) {
            throw new RuntimeException(sprintf(
                'Could not find row with identifier %d',
                $id
            ));
        }

        return $row;
    }

    public function saveExample(Example $example)
    {
        $data = [
            'name' => $example->name,
            'description'  => $example->description,
            'web_url'  => $example->web_url,
        ];

        $id = (int) $example->id;

        if ($id === 0) {
            $this->tableGateway->insert($data);
            return;
        }

        if (! $this->getExample($id)) {
            throw new RuntimeException(sprintf(
                'Cannot update example with identifier %d; does not exist',
                $id
            ));
        }

        $this->tableGateway->update($data, ['id' => $id]);
    }

    public function deleteExample($id)
    {
        $this->tableGateway->delete(['id' => (int) $id]);
    }
}

模块.config.php

<?php

namespace Example;

return [

    // The following section is new and should be added to your file:
    'router' => [
        'routes' => [
            'example' => [
                'type'    => Segment::class,
                'options' => [
                    'route' => '/example[/:action[/:id]]',
                    'constraints' => [
                        'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
                        'id'     => '[0-9]+',
                    ],
                    'defaults' => [
                        'controller' => Controller\ExampleController::class,
                        'action'     => 'index',
                    ],
                ],
            ],
        ],
    ],

    'view_manager' => [
        'template_path_stack' => [
            'example' => __DIR__ . '/../view',
        ],
    ],
];

模块.php

<?php

namespace Example;

use Zend\Db\Adapter\Adapter;
use Zend\Db\Adapter\AdapterInterface;
use Zend\Db\ResultSet\ResultSet;
use Zend\Db\TableGateway\TableGateway;
use Zend\ModuleManager\Feature\ConfigProviderInterface;

class Module implements ConfigProviderInterface
{
    public function getConfig()
    {
        return include __DIR__ . '\config\module.config.php';
    }

    // Add this method:
    public function getServiceConfig()
    {
        return [
            'factories' => [
                Model\ExampleTable::class => function($container) {
                    $tableGateway = $container->get(Model\ExampleTableGateway::class);
                    return new Model\ExampleTable($tableGateway);
                },
                Model\ExampleTableGateway::class => function ($container) {
                    $dbAdapter = $container->get(AdapterInterface::class);
                    $resultSetPrototype = new ResultSet();
                    $resultSetPrototype->setArrayObjectPrototype(new Model\Example());
                    return new TableGateway('example', $dbAdapter, null, $resultSetPrototype);
                },
            ],
        ];
    }

     public function getControllerConfig()
    {
        return [
            'factories' => [
                Controller\ExampleController::class => function($container) {
                    return new Controller\ExampleController(
                        $container->get(Model\ExampleTable::class)
                    );
                },
            ],
        ];
    }
}

例子.php

namespace Example\Model;

class Example
{
    public $id;
    public $name;
    public $description;
    public $web_url

    public function exchangeArray(array $data)
    {
        $this->id     = !empty($data['id']) ? $data['id'] : null;
        $this->name = !empty($data['name']) ? $data['name'] : null;
        $this->description  = !empty($data['description']) ? $data['description'] : null;
        $this->web_url  = !empty($data['web_url']) ? $data['web_url'] : null;
    }
}

modules.config.php

<?php
/**
 * @link      http://github.com/zendframework/ZendSkeletonApplication for the canonical source repository
 * @copyright Copyright (c) 2005-2016 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

/**
 * List of enabled modules for this application.
 *
 * This should be an array of module namespaces used in the application.
 */
return [
    'Zend\Form',
    'Zend\Db',
    'Zend\Router',
    'Zend\Validator',
    'Application',
    'Example',
];

我已经包含了所有内容，因为我真的不确定问题出在哪里。任何帮助将不胜感激。

Answer 1

您的 module.config.php 文件需要:

use Zend\Router\Http\Segment;

靠近顶部的声明，用于创建稍后在文件中使用的 Segment 别名。目前，因为它不存在，PHP 正在您声明的命名空间(所以 Example\Segment)中寻找那个不存在的类。