如何使用EventSubscriber服务在config.yml中声明bazinga_geocoder.geocoder？

Question

我计划在BazingaGeocoderBundle的基础上进行逆向地理编码。这样做的一个简单方法是在控制器中编写以下简单代码：

    $result = $this->container
        ->get('bazinga_geocoder.geocoder')
        ->using('google_maps')
        ->reverse(48.79084170157100,2.42479377175290);
    return $this->render("MinnAdsBundle:Motors:test.html.twig",
            array('result'=>var_dump($result))); 

在此之前，一切都很顺利。

我的目标是使代码更好和更可修复。因此，我使用这个文章编写了自己的GeocoderEventSubscriber，如下所示：

<?php

namespace Minn\AdsBundle\Doctrine\Event;

use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\PreUpdateEventArgs;
use Doctrine\ORM\Event\LifecycleEventArgs;
//use Geocoder\Provider\ProviderInterface;
use Bazinga\Bundle\GeocoderBundle\Geocoder\LoggableGeocoder;

/**
 * Subscribes to Doctrine prePersist and preUpdate to update an 
 * the address components of a MotorsAds entity
 * 
 * @author majallouli
 */
class MotorsAdsGeocoderEventSubscriber implements EventSubscriber {

    protected $geocoder;

    public function __construct(LoggableGeocoder $geocoder){
        $this->geocoder = $geocoder;
    }

    /**
    * Specifies the list of events to listen
    *
    * @return array
    */
    public function getSubscribedEvents(){
        return array(
            'prePersist',
            'preUpdate',
        );
    }

    /**
     * Sets a new MotorsAds's address components if not present 
     * 
     * @param LifecycleEventArgs $eventArgs 
     */
    public function prePersist(LifecycleEventArgs $eventArgs){
        $motorsAds = $eventArgs->getEntity();
        if($motorsAds instanceof \Minn\AdsBundle\Entity\MotorsAds){
            if( !$motorsAds->getCountry()){
                $em = $eventArgs->getEntityManager();
                $this->geocodeMotorsAds($motorsAds,$em);
            }
        }
    }

    /**
     * Sets an updating MotorsAds's address components if not present 
     * or any part of address updated
     * 
     * @param PreUpdateEventArgs $eventArgs 
     */
    public function preUpdate(PreUpdateEventArgs $eventArgs){
        $motorsAds = $eventArgs->getEntity();
        if($motorsAds instanceof \Minn\AdsBundle\Entity\MotorsAds){
             if( !$motorsAds->getCountry() ){
                $em = $eventArgs->getEntityManager();
                $this->geocodeMotorsAds($motorsAds,$em);

                $uow = $em->getUnitOfWork();
                $meta = $em->getClassMetadata(get_class($motorsAds));
                $uow->recomputeSingleEntityChangeSet($meta, $motorsAds);
            }
        }
    }

    /**
     * Geocode and set the MotorsAds's address components
     * 
     * @param type $motorsAds 
     */
    private function geocodeMotorsAds($motorsAds,$em){
        $result = $this->geocode
                ->using('google_maps')
                ->reverse($motorsAds->getLat(),$motorsAds->getLng());
        $motorsAds->setCountry(
                $em->getRepository("MinnAdsBundle:Country")->findCountryCode($result['countryCode']));
    }

}

之后，我将我的EventSubscriber声明为服务：

services:
    # ...
    geocoder_motorsads.listener:
        class:  Minn\AdsBundle\Doctrine\Event\MotorsAdsGeocoderEventSubscriber
        arguments: [@bazinga_geocoder.geocoder] # almost sure that the error is here!!
        tags:
            - { name: doctrine.event_subscriber }  

实际上，我得到了一个错误：

ContextErrorException: Notice: Undefined property: Minn\AdsBundle\Doctrine\Event\MotorsAdsGeocoderEventSubscriber::$geocode in /home/amine/NetBeansProjects/tuto/src/Minn/AdsBundle/Doctrine/Event/MotorsAdsGeocoderEventSubscriber.php line 78

我几乎可以肯定，错误发生在EventSubscriber的参数声明中。是@bazinga_geocoder.geocoder吗？

谢谢你的帮助!

Answer 1

您的属性是$this->geocoder，但您正在调用$this->geocode，您拼写错误。