Magento - 如何将可配置产品图像链接到简单产品图像？

$_product = $this->getProduct();

DOCROOTappdesignfrontend<pachage><theme>templatecatalogproductviewmedia.phtml

$_parentIdArray = Mage::getModel('catalog/product_type_configurable')->getParentIdsByChild($_product->getId());
if(sizeof($_parentIdArray)==1 && Mage::getModel('catalog/product')->load($_parentIdArray[0])->getTypeId() == 'configurable'){
  $_product = Mage::getModel('catalog/product')->load($_parentIdArray[0]);
}

DOCROOTappdesignfrontend<pachage><theme>templatecatalogproductlist.phtml

<?php foreach ($_productCollection as $_product): ?>

<?php ?>

<?php $i=0; foreach ($_productCollection as $_product): ?>

media/import/

class Wfs_Catalog_Helper_Image extends Mage_Catalog_Helper_Image
{
    public function init(Mage_Catalog_Model_Product $product, $attributeName, $imageFile=null)
    {
        parent::init($product, $attributeName, $imageFile);
        if (!$product->getId() || $imageFile || $product->isConfigurable()) {
            return $this;
        }

        $productImage = $product->getData($attributeName);
        if (!$productImage || $productImage == 'no_selection') {
            // Get parent product's attribute
            $value = $this->getParentProductAttribute($product->getId(), $attributeName);
            if ($value) {
                $this->_getModel()->setBaseFile($value);
            }
        }
        return $this;
    }

    public function getParentProductAttribute($productId, $attributeName)
    {
        $coreResource = Mage::getSingleton('core/resource');
        $conn = $coreResource->getConnection('core_read');

        $attrId = Mage::getSingleton('eav/config')
            ->getAttribute(Mage_Catalog_Model_Product::ENTITY, $attributeName)
            ->getId();

        $select = $conn->select()
            ->from(array('rel'  => $coreResource->getTableName('catalog/product_relation')), array())
            ->join(
                array('var' => $coreResource->getTableName('catalog_product_entity_varchar')),
                'var.entity_id = rel.parent_id',
                array('value')
            )
            ->where('rel.child_id = ?', $productId)
            ->where('var.attribute_id = ?', $attrId);

        return $conn->fetchOne($select);
    }
}