ControllerPlugin 类中的 ZF2 getServiceLocator

Question

我正在尝试在插件类中获取服务定位器/实体管理器，我怎样才能得到它。

在我的控制器中，我得到了这样的结果。

public function getEntityManager()
{
    if(null === $this->em){
        $this->em = $this->getServiceLocator()->get('doctrine.entitymanager.orm_default');
    }
    return $this->em;
}

public function setEntityManager(EntityManager $em)
{
    $this->em = $em;
}

但在插件类中，我在 $this->getServiceLocator() 行上遇到错误。因为这在插件类中不可用。

我怎样才能做到这一点，以便我可以获取一些记录并在插件中的数据库中插入一些记录。

我的插件类中确实有 MvcEvent $e 对象，我可以利用它来获取实体管理器吗？

我使用this plugin 来创建我的插件

任何指南都会被应用。

更新：

namespace Auth\Controller\Plugin;

use Zend\Mvc\Controller\Plugin\AbstractPlugin;
use Zend\EventManager\EventInterface as Event;
use Zend\Authentication\AuthenticationService;

use Doctrine\ORM\EntityManager;
use Auth\Entity\User;
use Zend\Mvc\MvcEvent;
class AclPlugin extends AbstractPlugin
{

    /*
    * @var Doctrine\ORM\EntityManager
    */
    protected $em;

    public function checkAcl($e)
    {

        $auth = new AuthenticationService();
        if ($auth->hasIdentity()) {
            $storage = $auth->getStorage()->read();            
            if (!empty($storage->role))
                $role = strtolower ( $storage->role );            
            else 
                $role = "guest";            
        } else {
            $role = "guest";            
        }
        $app = $e->getParam('application');
        $acl          = new \Auth\Acl\AclRules(); 

        $matches      = $e->getRouteMatch();
        $controller   = $matches->getParam('controller');
        $action       = $matches->getParam('action', 'index');

        $resource = strtolower( $controller );
        $permission = strtolower( $action );

        if (!$acl->hasResource($resource)) {
            throw new \Exception('Resource ' . $resource . ' not defined');
        }

        if ($acl->isAllowed($role, $resource, $permission)) {

            $query = $this->getEntityManager($e)->createQuery('SELECT u FROM Auth\Entity\User u');
            $resultIdentities = $query->execute();

            var_dump($resultIdentities);
            exit();


            return;

        } else {
            $matches->setParam('controller', 'Auth\Controller\User'); // redirect
            $matches->setParam('action', 'accessdenied');    

            return;
        }


    }


    public function getEntityManager($e) {

        var_dump($this->getController()); // returns null
        exit();
        if (null === $this->em) {
            $this->em = $this->getController()->getServiceLocator()->get('doctrine.entitymanager.orm_default');

        }
        return $this->em;
    }

    public function setEntityManager(EntityManager $em) {
        $this->em = $em;
    }

}

我在module.php中调用上面的类

    public function onBootstrap(Event $e) 
    {

        $application = $e->getApplication();        
        $services    = $application->getServiceManager();        

        $eventManager = $e->getApplication()->getEventManager();
        $eventManager->attach('dispatch', array($this, 'loadConfiguration'),101);

    }

public function loadConfiguration(MvcEvent $e)
    {

        $e->getApplication()->getServiceManager()
                  ->get('ControllerPluginManager')->get('AclPlugin')
                  ->checkAcl($e); //pass to the plugin...      

    }

我在 module.config.php 中注册了这个插件

return array(  
 'controllers' => array(
        'invokables' => array(
            'Auth\Controller\User' => 'Auth\Controller\UserController',
        ),
    ), 

    'controller_plugins' => array(
      'invokables' => array(
          'AclPlugin' => 'Auth\Controller\Plugin\AclPlugin',
      ),  
    ),
);

Answer 1

“插件类”是什么意思？如果您正在谈论控制器插件，您可以使用（从控制器插件的范围）访问它：$this->getController()->getServiceLocator()->get('doctrine.entitymanager.orm_default');。

对于其他类，我通常会创建一个自动注入 ServiceManager 实例的工厂。例如在 Module 类中：

public function getServiceConfig()
{
    return array(
        'factories' => array(
            'myServiceClass' => function(ServiceManager $sm) {
                $instance = new Class();
                $instance->setServiceManager($sm);
                // Do some other configuration

                return $instance;
            },
        ),
    );
}

// access it using the ServiceManager where you need it
$myService = $sm->get('myService');

Answer 2

将上面的 AclPlugin 类更改如下

namespace Auth\Controller\Plugin;

use Zend\Mvc\Controller\Plugin\AbstractPlugin;
use Zend\EventManager\EventInterface as Event;
use Zend\Authentication\AuthenticationService;

use Doctrine\ORM\EntityManager;
use Auth\Entity\User;
use Zend\Mvc\MvcEvent;

use Zend\ServiceManager\ServiceManagerAwareInterface;
use Zend\ServiceManager\ServiceManager;
class AclPlugin extends AbstractPlugin implements ServiceManagerAwareInterface
{

   /*
    * @var Doctrine\ORM\EntityManager
    */
    protected $em;

    protected $sm;

    public function checkAcl($e)
    {

        $this->setServiceManager( $e->getApplication()->getServiceManager() );

        $auth = new AuthenticationService();
        if ($auth->hasIdentity()) {
            $storage = $auth->getStorage()->read();            
            if (!empty($storage->role))
                $role = strtolower ( $storage->role );            
            else 
                $role = "guest";            
        } else {
            $role = "guest";            
        }
        $app = $e->getParam('application');
        $acl          = new \Auth\Acl\AclRules(); 

        $matches      = $e->getRouteMatch();
        $controller   = $matches->getParam('controller');
        $action       = $matches->getParam('action', 'index');

        $resource = strtolower( $controller );
        $permission = strtolower( $action );

        if (!$acl->hasResource($resource)) {
            throw new \Exception('Resource ' . $resource . ' not defined');
        }

        if ($acl->isAllowed($role, $resource, $permission)) {

            $query = $this->getEntityManager($e)->createQuery('SELECT u FROM Auth\Entity\User u');
            $resultIdentities = $query->execute();

            var_dump($resultIdentities);
            foreach ($resultIdentities as $r)
                echo $r->username;
            exit();


            return;

        } else {
            $matches->setParam('controller', 'Auth\Controller\User'); // redirect
            $matches->setParam('action', 'accessdenied');    

            return;
        }

    }



    public function getEntityManager() {

        if (null === $this->em) {
            $this->em = $this->sm->getServiceLocator()->get('doctrine.entitymanager.orm_default');

        }
        return $this->em;
    }

    public function setEntityManager(EntityManager $em) {
        $this->em = $em;
    }

   /**
    * Retrieve service manager instance
    *
    * @return ServiceManager
    */
    public function getServiceManager()
    {
        return $this->sm->getServiceLocator();
    }

    /**
    * Set service manager instance
    *
    * @param ServiceManager $locator
    * @return void
    */
    public function setServiceManager(ServiceManager $serviceManager)
    {
        $this->sm = $serviceManager;
    } 

}

Answer 3

其实在控制器插件中获取ServiceManager是很简单的！

只需使用：$this->getController()->getServiceLocator()

例子：

namespace Application\Controller\Plugin;

use Zend\Mvc\Controller\Plugin\AbstractPlugin;

class Translate extends AbstractPlugin 
{

    public function __invoke($message, $textDomain = 'default', $locale = null) 
    {
        /** @var \Zend\I18n\Translator\Translator $translator */
        $translator = $this->getController()->getServiceLocator()->get('translator');

        return $translator->translate($message, $textDomain, $locale);
    }
}