如何在magento中按庫存狀態對產品集合進行排序

Question

我想在類別頁面上對產品集合進行排序，以便有庫存的產品應在無庫存的產品之前出現。 所有缺貨的產品將顯示在有貨的產品之后。 我已經重寫了Mage_Product_Block_List塊。

Answer 1

You can use catalog_product_collection_load_before event.   
And in the observer:

public function modifyProductCollection(Varien_Event_Observer $observer) {
    //catalog_product_collection_load_before
    $collection = $observer->getCollection();

    $collection->getSelect()->joinLeft(
                array('_inventory_table' => $collection->getTable('cataloginventory/stock_item')),
                "_inventory_table.product_id = e.entity_id",
                array('is_in_stock')
            )
            ->order('is_in_stock DESC')
            ->order('created_at DESC');
}