在Magento产品分类页面创建推荐产品

在进行Magento的相关操作的时候，你可能都想在产品分类页面添加上这一类产品的推荐产品（FeaturedProducts），这类产品一般是销售比较好的，或者是你的利润比较大的产品，那我们应该怎么样添加上这类产品呢？下面是描述如何显示一组推荐产品(Featured Product)。 Featured产品需要在后台为产品增加一个Featured属性。 当管理员在Featured属性上选择Yes时，该产品就以Block的形式显示在产品列表页。

步骤 1) 创建一个”Featured”属性

进入后台Catalog > Attributes > Manage Attributes > Add New Attribute. 添加一个新的属性
Attribute Properties

• Attribute Identifier: featured
• Scope: Store View
• Catalog Input Type for Store Owner: Yes/No
• Unique Value (not shared with other products): No
• Values Required: No
• Input Validation for Store Owner: None
• Apply To: All Product Types

Front End Properties

• Use in quick search: No
• Use in advanced search: Yes
• Comparable on Front-end: No
• Use In Layered Navigation (Can be used only with catalog input type ‘Dropdown’): No
• Visible on Catalog Pages on Front-end: Yes

Manage Label/Options

• Default: Featured Product
• English: Featured Product

然后保存，然后去Catalog → Attributes → Manage Attributes Sets，把该属性加入到默认属性集。

步骤2). 加一个Block配置到catalog.xml

打开 app/design/frontend/default/default/layout/catalog.xml. 我们在默认Category Layout标签的product list block上方加一个新的Block. 差不多在该文件的73行
Layerout代码

<catalog_category_default>   <block type=”catalog/product_featured” name=”product_featured” as=”product_featured” template=”catalog/product/featured.phtml”></block>   …..   </catalog_category_default>

步骤 3) 创建一个新的Block类从数据库取出所有Featured产品
PHP代码

<?php   class MyCompany_Catalog_Block_Product_Featured extends Mage_Catalog_Block_Product_Abstract   {       public function getFeaturedProducts(){         $ids = $this->_getFeaturedProductsIds();                  $collection = Mage::getModel(‘catalog/product’)->getCollection();         $collection->getSelect()->where(“e.entity_id in (?)”, $ids);         $collection->addAttributeToSelect(‘name’);         $productList = $collection->load();                  return $productList;       }              public function _getFeaturedProductsIds(){           // instantiate database connection object           $categoryId = $this->getRequest()->getParam(‘id’, false);           $resource = Mage::getSingleton(‘core/resource’);           $read = $resource->getConnection(‘catalog_read’);           $categoryProductTable = $resource->getTableName(‘catalog/category_product’);           //$productEntityIntTable = $resource->getTableName(‘catalog/product_entity_int’); // doesn’t work             $productEntityIntTable = (string)Mage::getConfig()->getTablePrefix() . ‘catalog_product_entity_int’;           $eavAttributeTable = $resource->getTableName(‘eav/attribute’);           // Query database for featured product           $select = $read->select()                          ->from(array(‘cp’=>$categoryProductTable))                          ->join(array(‘pei’=>$productEntityIntTable), ‘pei.entity_id=cp.product_id’, array())                          ->joinNatural(array(‘ea’=>$eavAttributeTable))                          ->where(‘cp.category_id=?’, $categoryId)                          ->where(‘pei.value=1′)                          ->where(‘ea.attribute_code=”featured”‘);                             $rows = $read->fetchAll($select);           $ids = array();           foreach($rows AS $row) {             $ids[] = $row['product_id'];           }           $ret = implode(“,”, $ids);           return $ids;       }   }   ?>

步骤4): 扩展Mage_Catalog_Block_Category_View

创建一个文件叫app/code/local/MyCompany/Catalog/Block/Category/View.php.

PHP代码

<?php   class MyCompany_Catalog_Block_Category_View extends Mage_Catalog_Block_Category_View   {       public function getFeaturedProductsHtml()       {           return $this->getBlockHtml(‘product_featured’);       }   }   ?>

步骤5): 修改模板文件
1). 编辑 app/design/frontend/default/default/template/catalog/category/view.phtml ，在
Template代码

<?php echo $this->getProductListHtml()?>

的上面一行加入:

Template代码

<div style=”border: 1px green solid”><h4>Featured Products</h4> <?php echo $this->getFeaturedProductsHtml()?> </div>

2). 创建app/design/frontend/default/default/template/catalog/product/featured.phtml
Template代码

<?php $_products=$this->getFeaturedProducts() ?>   <ul>   <?php foreach($_products AS $_product) { ?>       <li><a href=”<?php echo $_product->getProductUrl() ?>”><?php echo $this->htmlEscape($_product->getName()) ?></a></li>   <?php  }   ?>   </ul>

步骤 6) 加一个新的块到app/etc/local.xml，最好的做法是建立一个新的文件app/etc/modules/MyCompany_Catalog.xml(文件名不必一定是MyCompany_Catalog),内容如下：
Layerout代码

<?xml version=”1.0″?>   <config>       <global>           <blocks>               <catalog>                   <rewrite>                       <product_featured>MyCompany_Catalog_Block_Product_Featured</product_featured>                  </rewrite>                   <rewrite>                       <category_view>MyCompany_Catalog_Block_Category_View</category_view>                   </rewrite>                </catalog>           </blocks>        </global>   </config>

分析：
步骤2). 加一个Block配置到catalog.xml
步骤5): 修改模板文件的小步骤1), 编辑 app/design/frontend/default/default/template/catalog/category/view.phtml

该例证明：有些扩展涉及到对原系统的更改。

当运行某产品分类网页时，显示app/design/frontend/default/default/template/catalog/category/view.phtml ，接下来调用序列为：
a. <div style=”border: 1px green solid”><h4>Featured Products</h4> <?php echo $this->getFeaturedProductsHtml()?> </div>
b. MyCompany_Catalog_Block_Category_View->getFeaturedProductsHtml() {
         $this->getBlockHtml(‘product_featured’);
    }
c. 在Catalog.xml中找到product_featured块的定义，调用对应的phtml文件： app/design/frontend/default/default/template/catalog/product/featured.phtml
d. featured.phtml文件中<?php $_products=$this->getFeaturedProducts() ?> 调用对应Block的关键方法getFeaturedProducts().显示到网页上