一般在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，从网络上得知常见的方法是修改Mage_Catalog_Model_Product的delete()方法：
把
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public function delete()
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{
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parent::delete();
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Mage::dispatchEvent($this->_eventPrefix.’_delete_after_done’, array($this->_eventObject=>$this));
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return $this;
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}
修改为
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public function delete()
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{
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parent::delete();
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Mage::dispatchEvent($this->_eventPrefix.’_delete_after_done’, array($this->_eventObject=>$this));
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foreach ($this->getMediaGallery(‘images’) as $image) {
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$image_path = $this->getMediaConfig()->getMediaPath($image['file']);
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if (file_exists($image_path)) {
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@unlink($image_path);
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}
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}
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return $this;
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}
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
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<?xml version=”1.0″?>
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<config>
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<modules>
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<MagentoBoy_DeleteProductImages>
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<active>true</active>
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<codePool>local</codePool>
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</MagentoBoy_DeleteProductImages>
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</modules>
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</config>
并添加配置文件：
/app/code/local/MagentoBoy/DeleteProductImages/etc/config.xml
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<?xml version=”1.0″?>
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<config>
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<modules>
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<MagentoBoy_DeleteProductImages>
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<version>0.1.0</version>
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</MagentoBoy_DeleteProductImages>
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</modules>
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</config>
2 添加Observer
/app/code/local/MagentoBoy/DeleteProductImages/Model/Observer.php
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<?php
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class MagentoBoy_DeleteProductImages_Model_Observer
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{
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public function processProductAfterDeleteEvent(Varien_Event_Observer $observer)
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{
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$eventProduct = $observer->getEvent()->getProduct();
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if ($eventProduct && $eventProduct->getId()) {
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foreach ($eventProduct->getMediaGallery(‘images’) as $image) {
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$image_path = $eventProduct->getMediaConfig()->getMediaPath($image['file']);
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if (file_exists($image_path)) {
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@unlink($image_path);
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}
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}
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}
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return $this;
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}
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}
并在config.xml中添加models和events
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<config>
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<global>
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<models>
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<deleteproductimages>
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<class>MagentoBoy_DeleteProductImages_Model</class>
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</deleteproductimages>
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</models>
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<events>
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<catalog_product_delete_after_done>
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<observers>
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<deleteproductimages>
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<class>deleteproductimages/observer</class>
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<method>processProductAfterDeleteEvent</method>
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</deleteproductimages>
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</observers>
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</catalog_product_delete_after_done>
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</events>
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</global>
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</config>
