In Magento 1.7, I added a column in the shipment grid displaying the total of the associated order for each shipment. To achieve this, in the Mage_Adminhtml_Block_Sales_Shipment_Grid file, I added the following code: protected function _prepareCollection() { $collection = Mage::getResourceModel($this->_getCollectionClass()); $collection->getSelect()->joinLeft( array('order' => $collection->getTable('sales/order')), 'order.entity_id = main_table.order_id', array() ); $collection->addExpressionFieldToSelect('importo', […]