public function _afterLoad()
 {
     foreach ($this as $object) {
         $order_id = $object->getEntityId();
         $sales_flat_order_item = $this->getTable('sales/order_item');
         $adapter = $this->getResource()->getReadConnection();
         $select = $adapter->select()->from($sales_flat_order_item, array('sku'))->where("order_id = {$order_id} and parent_item_id IS NULL");
         $rows = $adapter->fetchAll($select);
         $skus = '';
         foreach ($rows as $row) {
             $skus .= $row['sku'] . ',';
         }
         $skus = substr($skus, 0, -1);
         $object->setSkus($skus);
     }
     return parent::_afterLoad();
 }
 protected function _afterLoad()
 {
     parent::_afterLoad();
     if (count($this->_items) > 0) {
         $ids = array();
         foreach ($this->_items as $item) {
             $ids[] = $item->getId();
         }
         $ids = implode(',', $ids);
         $select = $this->getConnection()->select()->from($this->getTable('sales/order_status_history'))->where("parent_id IN ({$ids})")->order('created_at ASC');
         $items = $this->getConnection()->fetchAll($select);
         foreach ($items as $item) {
             $parent = $this->_items[$item['parent_id']];
             $parent->setOrdercomment($item['comment']);
         }
     }
     return $this;
 }