PLP页面中的排序功能，如按照销量排序，按照人气排序等

１．在后台中新建产品属性salestotal用作销量排序
２．新建Tang/ProductSales模块
３．配置模块的config.xml文件

    
        
            0.1.0
       
    

    

        
            
                standard
                
                    Tang_ProductSales
                    productsales
                
            
        

        
            
                
                    productsales.xml
                
            
        

    

    

        
            
                Tang_ProductSales_Model
                productsales_resource
            
            
            
                Tang_ProductSales_Model_Resource
                productsales_mysql4
                
                    
                        catalog_product_entity_varchar
                    
                
            
            
        

        
            
                
                    
                        
                        model
                        productsales/observer
                        preOrderSubmitInsertProductSales
                    
                
            
        

        
            
                Tang_ProductSales_Helper
            
        

        
            
                Tang_ProductSales_Block
            
        

        
            
                
                    core_write
                
            
            
                
                    core_read
                
            
        

    

４．配置监听时间，当提交订单后，订单中的产品销量属性加一

getLastRealOrderId(); //订单ID
        $order = Mage::getModel('sales/order')->loadByIncrementId($incrementId); //订单信息
        $orderItems = $order->getItemsCollection();

        foreach ($orderItems as $item) {
            //获取指定产品对象
            $prcProject = Mage::getModel('catalog/product')->load($item->getProductId());
            $attrProject = Mage::getModel('eav/entity_attribute')->load('renqi','attribute_code'); //获取指定属性标识码的属性信息
            $entypeid = $attrProject->getEntity_type_id(); //Eav类型
            $attrid = $attrProject->getAttribute_id(); //属性ID
            $storeid = 0; //商店ID
            $entityid = $item->getProductId(); //产品ID
            $_product = Mage::getResourceModel('reports/product_collection')
                ->addOrderedQty()
                ->addAttributeToFilter('sku', $prcProject->getSku())
                ->setOrder('ordered_qty', 'desc')
                ->getFirstItem();
            $svalue = (int)$_product->getOrderedQty();
//            $svalue = (int)$_product->addOrderedQty() + $prcProject->getSalestotal(); //销量累加
            if($svalue >0){
                $ifused = true;
            }else{
                $ifused = false;
            }
            Mage::getResourceSingleton('productsales/salestotal')->updProductSalesTotal($entypeid, $attrid, $storeid, $entityid, $svalue, $ifused);

        }
        return $this;
    }
}

４．对销量属性进行写入：

_init("productsales/catalog_product_entity_varchar","value_id");
    }

    /**
     * 添加产品销量到产品信息中
     * @param int $entypeid eav类型
     * @param int $attrid 属性ID
     * @param int $storeid 商店ID
     * @param int $entityid 产品ID
     * @param varchar $svalue 销量
     * @param bool $ifused 是否已存在
     * @return number
     */

    public function updProductSalesTotal($entypeid, $attrid, $storeid, $entityid, $svalue, $ifused){
        $selfread = $this->_getConnection('productsales_write');
        $table = $this->getTable('productsales/catalog_product_entity_varchar');
        //存入数组的数据
        $sdata = array("entity_type_id"=>$entypeid, 'attribute_id'=>$attrid, 'store_id'=>$storeid, 'entity_id'=>$entityid, 'value'=>$svalue);
        //查询条件
        if($ifused){
            $swhere = " attribute_id=$attrid"." AND entity_id=$entityid";
            //执行更新操作
            return $selfread->update($table, $sdata, $swhere);
        }else{
            //执行插入操作
            return $selfread->insert($table, $sdata);
        }
    }
}

具体可以参考旺铺商城的项目