Zend Framework 2中的服务定位器

Question

在控制器中,我创建并使用我的模型

public function getAlbumTable()
{
    if (!$this->albumTable) {
        $sm = $this->getServiceLocator();
        $this->albumTable = $sm->get('Album\Model\AlbumTable');
    }
    return $this->albumTable;
}

如何在项目的其他位置使用此全局服务定位器,例如,在其他模型中,而不仅仅在任何控制器中？

С配置与数据库的连接在文件中定义:my_project/config/autoload/global.php

谢谢.

Answer 1

Zend MVC将ServiceLocator实例注入到实现Zend\ServiceManager\ServiceLocatorAwareInterface的类中.模型表的简单实现如下所示:

<?php
use Zend\Db\TableGateway\AbstractTableGateway;
use Zend\ServiceManager\ServiceLocatorAwareInterface;
use Zend\ServiceManager\ServiceLocatorInterface;

class UserTable extends AbstractTableGateway implements ServiceLocatorAwareInterface {
  protected $serviceLocator;

  public function setServiceLocator(ServiceLocatorInterface $serviceLocator) {
    $this->serviceLocator = $serviceLocator;
  }

  public function getServiceLocator() {
    return $this->serviceLocator;
  }

  // now instance of Service Locator is ready to use
  public function someMethod() {
    $table = $this->serviceLocator->get('Album\Model\AlbumTable');
    //...
  }
}

Answer 2

决定.所以.要解决类模型的任务,必须实现ServiceLocatorAwareInterface接口.因此,注入ServiceManager将自动发生在您的模型中.请参阅上一个示例.

对于您的应用程序的表单和其他对象,此处提出了合适的方法http://michaelgallego.fr/blog/?p=205您可以创建基类表单extends BaseForm并实现ServiceManagerAwareInterface,您将从该表单继承其在应用程序中的表单.

namespace Common\Form;

use Zend\Form\Form as BaseForm;
use Zend\ServiceManager\ServiceManager;
use Zend\ServiceManager\ServiceManagerAwareInterface;

class Form extends BaseForm implements ServiceManagerAwareInterface
{
    /**
     * @var ServiceManager
     */
    protected $serviceManager;

    /**
     * Init the form
     */
    public function init()
    {
    }

    /**
     * @param ServiceManager $serviceManager
     * @return Form
     */
    public function setServiceManager(ServiceManager $serviceManager)
    {
        $this->serviceManager = $serviceManager;

        // Call the init function of the form once the service manager is set
        $this->init();

        return $this;
    }
}

要注入ServiceManager的对象是自动在文件module.config.php中的service_manager部分,你需要编写

'invokables' => array(
    'Album\Form\AlbumForm' => 'Album\Form\AlbumForm',
),

然后在您的控制器中,您可以创建一个表单

$form = $this->getServiceLocator()->get('Album\Form\AlbumForm');

该表单将包含一个对象ServiceManager,它将允许其他依赖项.

感谢你的帮助.