protected function _prepareCollection(Mzax_Emarketing_Model_Object_Collection $collection) { parent::_prepareCollection($collection); // add currency code for price columns $collection->getQuery()->joinTable(array('entity_id' => '{order_id}'), 'sales/order', 'order'); $collection->addField('currency_code', "`order`.`base_currency_code`"); }
protected function _prepareCollection(Mzax_Emarketing_Model_Object_Collection $collection) { parent::_prepareCollection($collection); // add currency code for price columns $collection->addField('currency_code', "`{$this->_tableAlias}`.`base_currency_code`"); }