Example #1
0
 /**
  * set collection object
  *
  * @param Varien_Data_Collection $collection
  */
 public function setCollection($collection)
 {
     if (Mage::helper('catalog')->isModuleEnabled('Mage_CatalogInventory')) {
         $select = $collection->getSelect();
         $fromParts = $select->getPart(Zend_Db_Select::FROM);
         if (isset($fromParts['at_qty'])) {
             unset($fromParts['at_qty']);
             $select->reset(Zend_Db_Select::FROM);
             $select->setPart(Zend_Db_Select::FROM, $fromParts);
             $subquery = $collection->getConnection()->select()->from(array('at_sub_qty' => $collection->getResource()->getTable('cataloginventory/stock_item')), array('product_id'))->columns(new Zend_Db_Expr("SUM(at_sub_qty.qty) AS qty"))->group('at_sub_qty.product_id');
             $select->joinLeft(array('at_qty' => $subquery), 'at_qty.product_id=e.entity_id', array());
         }
     }
     parent::setCollection($collection);
 }