@SanderMangel提供的解决方案是一流的。我可以通过一些代码来帮助扩展这一点，目前我在模块“自动/动态类别”产品中使用该代码-能够对特殊的产品执行类别规则
该代码调整了标准产品集合，以在代码运行当天获得具有特殊价格设置的所有产品。您可以在cron中使用它在00:00时重新填充类别，并确保它们保持更新。
请注意，代码是从更大的模块中提取的，因此，我在这里为您压缩了相关部分。可能没有一两个变量未在此提取中表示，但是很容易推断出来，或者问一下:)
$ category对象是包含产品的实际类别。下面的代码也将允许您以％值指定折扣：）
$collection = $category->getProductCollection();
$todayDate = Mage::app()->getLocale()->date()->toString(Varien_Date::DATE_INTERNAL_FORMAT);
$collection->addAttributeToFilter(array(
array(
'attribute' => "special_to_date",
'null' => true
),
array(
'attribute' => "special_to_date",
'from' => $todayDate,
//'to' => $todayDate,
'date' => true
)
));
$collection->addAttributeToFilter(array(
array(
'attribute' => "special_from_date",
'null' => true
),
array(
'attribute' => "special_from_date",
//'from' => $todayDate,
'to' => $todayDate,
'date' => true
)
));
$collection->addAttributeToSelect('special_price','left');
$collection->addAttributeToSelect('price','left');
$select = $collection->getSelect();
if (strpos($value, '%') > 0) {
$value = str_replace('%', '', $value);
$select->where('( 100 - (( at_special_price.value * 100 ) / at_price.value ) ) ' . $operator . ' ' . $value);
} else {
$select->where('((at_price.value - at_special_price.value)) ' . $operator . ' ' . $value);
}
现在，要注意的是，该集合将不会返回产品，因为它包含指向常规目录<->产品链接表的链接。由于您对当前的链接产品不感兴趣，因此需要从集合中清除该表关系。
我使用以下代码来完成该任务：
/**
* Remove Catalog Product Link elements from collection
*
* @param type $collection
* @return type
*/
public function removeCatProPart($collection)
{
$select = $collection->getSelect();
$fromPart = $select->getPart(Zend_Db_Select::FROM);
$select->reset(Zend_Db_Select::FROM);
if (array_key_exists('cat_pro', $fromPart)) {
unset($fromPart['cat_pro']);
// also remove any reference to the table in the rest of the query
$columns = $select->getPart(Zend_Db_Select::COLUMNS);
$columnRemoved = false;
foreach ($columns as $columnKey => $column) {
if ($column[0] == 'cat_pro') {
unset($columns[$columnKey]);
$columnRemoved = true;
}
}
if ($columnRemoved) {
$select->setPart(Zend_Db_Select::COLUMNS, $columns);
}
$orderPart = $select->getPart(Zend_Db_Select::ORDER);
$orderRemoved = false;
foreach ($orderPart as $orderKey => $order) {
if ($order[0] == 'cat_pro') {
unset($orderPart[$orderKey]);
$orderRemoved = true;
}
}
if ($orderRemoved) {
$select->setPart(Zend_Db_Select::ORDER, $orderPart);
}
}
$select->setPart(Zend_Db_Select::FROM, $fromPart);
return $collection;
}
另外，您可以使用相同的技巧来调整目录产品集合，并查找由于目录规则而处于特殊模式的产品：
$storeDate = Mage::app()->getLocale()->storeTimeStamp($this->getStoreId());
$value = $this->getValue();
$conditions = 'price_rule.product_id = e.entity_id AND ';
$conditions .= "(from_time = 0
OR from_time <= " . $storeDate . ")
AND (to_time = 0
OR to_time >= " . $storeDate . ") AND ";
$conditions .= "price_rule.rule_id IN (" . $value . ")";
$collection->getSelect()->joinInner(
array('price_rule' => $collection->getTable('catalogrule/rule_product')), $conditions);
$collection->setFlag('applied_catalog_rule_id', true);
$collection->setFlag('applied_rule', true);
一旦有了工作集合，您所需要做的就是从集合中获取所有ID，翻转数组，然后使用$category->setPostedProducts($products);和$ category-> save（）l;。完成更新。
为了完整起见，这是我的日常cron，用于使动态类别保持最新。（再次，它指的是此处未包括的方法，但是我敢肯定，它将为您提供正确的方向
玩得开心 ：）
public static function rebuildAllDynamic($schedule)
{
try {
$tempDir = sys_get_temp_dir() . "/";
$fp = fopen($tempDir . "dyncatprod_rebuild.lock", "w+");
if (flock($fp, LOCK_EX | LOCK_NB)) {
if (Mage::getStoreConfig('dyncatprod/debug/enabled')) {
mage::log("DynCatProd - rebuildAllDynamic");
}
if (!Mage::getStoreConfig('dyncatprod/rebuild/max_exec')) {
ini_set('max_execution_time', 3600); // 1 hour
}
$categories = Mage::getModel('catalog/category')
->getCollection()
->addAttributeToSelect('*')
->addIsActiveFilter()
->addAttributeToFilter('dynamic_attributes', array('notnull' => true));
foreach ($categories as $category) {
$products = Mage::helper('dyncatprod')->getDynamicProductIds($category);
if (is_array($products)) {
if (Mage::getStoreConfig('dyncatprod/debug/enabled')) {
mage::log("rebuilding :" . $category->getName() . ' ' . $category->getPath() );
}
$products = array_flip($products);
$category->setPostedProducts($products);
$category->setIsDynamic(true);
$category->save();
}
}
flock($fp, LOCK_UN);
unlink($tempDir . "dyncatprod_rebuild.lock");
} else {
mage::log('Could not execute cron for rebuildAllDynamic -file lock is in place, job may be running');
}
} catch (Exception $e) {
flock($fp, LOCK_UN);
unlink($tempDir . "dyncatprod_rebuild.lock");
mage::logException($e);
return $e->getMessage();
}
}
参考：http : //www.proxiblue.com.au/magento-dynamic-category-products.html