在Magento后台删除产品时,默认不会删除产品的图片,如果长期不清理这些废弃的图片,会导致Media目录下的文件越来越多,浪费服务器空间,为了实现删除产品的同时删除图片,网络上常见的方法是修改Mage_Catalog_Model_Product的delete()方法:
把
public function delete() { parent::delete(); Mage::dispatchEvent($this->_eventPrefix.'_delete_after_done', array($this->_eventObject=>$this)); return $this; }
修改为
public function delete() { parent::delete(); Mage::dispatchEvent($this->_eventPrefix.'_delete_after_done', array($this->_eventObject=>$this)); foreach ($this->getMediaGallery('images') as $image) { $image_path = $this->getMediaConfig()->getMediaPath($image['file']); if (file_exists($image_path)) { @unlink($image_path); } } return $this; }
这个方法是通过重写Model的方法实现的,下面我们将采用事件触发的方法来实现,我们观察在delete()函数中触发了catalog_product_delete_after_done事件,因此我们可以写一个插件,当观察到这个事件时删除产品的图片。
1 新建模块
在/app/code/local/MagentoBoy/DeleteProductImages目录下新建一个模块MagentoBoy_DeleteProductImages,并添加模块文件:
/app/etc/modules/MagentoBoy_DeleteProductImages.xml
<?xml version="1.0"?>
<config>
<modules>
<MagentoBoy_DeleteProductImages>
<active>true</active>
<codePool>local</codePool>
</MagentoBoy_DeleteProductImages>
</modules>
</config>
并添加配置文件:
/app/code/local/MagentoBoy/DeleteProductImages/etc/config.xml
<?xml version="1.0"?> <config> <modules> <MagentoBoy_DeleteProductImages> <version>0.1.0</version> </MagentoBoy_DeleteProductImages> </modules> </config>
2 添加Observer
/app/code/local/MagentoBoy/DeleteProductImages/Model/Observer.php
<?php class MagentoBoy_DeleteProductImages_Model_Observer { public function processProductAfterDeleteEvent(Varien_Event_Observer $observer) { $eventProduct = $observer->getEvent()->getProduct(); if ($eventProduct && $eventProduct->getId()) { foreach ($eventProduct->getMediaGallery('images') as $image) { $image_path = $eventProduct->getMediaConfig()->getMediaPath($image['file']); if (file_exists($image_path)) { @unlink($image_path); } } } return $this; } }
并在config.xml中添加models和events
<config> <global> <models> <deleteproductimages> <class>MagentoBoy_DeleteProductImages_Model</class> </deleteproductimages> </models> <events> <catalog_product_delete_after_done> <observers> <deleteproductimages> <class>deleteproductimages/observer</class> <method>processProductAfterDeleteEvent</method> </deleteproductimages> </observers> </catalog_product_delete_after_done> </events> </global> </config>
这样就实现了在Magento中删除产品同时删除图片的功能,使用事件触发的方式更为灵活,方便在多个模块中扩展功能。