Magento：按两个类别筛选的产品集合

我正在编写一个模块，为我加载一个特色产品列表。所有特色产品都位于自己的类别+隐藏类别“特色”。脚本返回一个错误

在category视图（list.phtml）中，我调用

gettopproducts.phtml

（这很好）：

此行：

->addAttributeToFilter（'category_id'，array（'finset'=>'87'）应添加第二个类别过滤器（“特色”类别的ID）。但是当我使用这个时，我会得到一个错误。删除此行时：
->addAttributeToFilter（'category_id'，array（'finset'=>'87'）它工作得很好

我正在使用Magento 1.7.2，我找到了原因。对于Magento 1.4+，类别ID不是报告/产品集合的成员

这是获得它的方法：
替换
->addAttributeToFilter（'category_id'，array（'finset'=>'87'）
与：

代码如下所示：

$_productCollection = Mage::getResourceModel('reports/product_collection');
$_productCollection->addAttributeToSelect('*');
$_productCollection->addCategoryFilter($currentCategory);
$_productCollection->joinField('category_id', 'catalog/category_product', 'category_id', 'product_id = entity_id', null, 'left');
$_productCollection->addAttributeToFilter('category_id', array('in' => array('finset' => '87')));        
$_productCollection->load();
return $_productCollection;

对于magento 1.7，这是我的工作原理：

$collection = Mage::getModel('catalog/product')->getCollection()
    ->addAttributeToSelect('id')        
    ->addAttributeToFilter('visibility', 4)
    ->addAttributeToFilter('home_slider', array('neq' => ''))
    ->addAttributeToFilter('home_slider_value', $slide_num)
    ->addStoreFilter();
    //here pass an array() of CATEGORY IDs
    $catids = array('id_1,id_2, etc..'); 

    $statements = array();
    foreach ($catids as $categoryId){
        if (is_numeric($categoryId)){
         $statements[] = "{{table}}.category_id = $categoryId";
        }
    }

    $collection->distinct(true)
    ->joinField('category_id','catalog/category_product', null,'product_id = entity_id', implode(" OR ",$statements),'inner');

$_productCollection->joinField('category_id', 'catalog/category_product', 'category_id', 'product_id = entity_id', null, 'left');
$_productCollection->addAttributeToFilter('category_id', array('in' => array('finset' => '87'))); 

$_productCollection = Mage::getResourceModel('reports/product_collection');
$_productCollection->addAttributeToSelect('*');
$_productCollection->addCategoryFilter($currentCategory);
$_productCollection->joinField('category_id', 'catalog/category_product', 'category_id', 'product_id = entity_id', null, 'left');
$_productCollection->addAttributeToFilter('category_id', array('in' => array('finset' => '87')));        
$_productCollection->load();
return $_productCollection;

$collection = Mage::getModel('catalog/product')->getCollection()
    ->addAttributeToSelect('id')        
    ->addAttributeToFilter('visibility', 4)
    ->addAttributeToFilter('home_slider', array('neq' => ''))
    ->addAttributeToFilter('home_slider_value', $slide_num)
    ->addStoreFilter();
    //here pass an array() of CATEGORY IDs
    $catids = array('id_1,id_2, etc..'); 

    $statements = array();
    foreach ($catids as $categoryId){
        if (is_numeric($categoryId)){
         $statements[] = "{{table}}.category_id = $categoryId";
        }
    }

    $collection->distinct(true)
    ->joinField('category_id','catalog/category_product', null,'product_id = entity_id', implode(" OR ",$statements),'inner');