public static function ormBeforewriteShopOrder($params)
    {
        if (!\RS\Router\Manager::obj()->isAdminZone() && $params['flag'] == \RS\Orm\AbstractObject::INSERT_FLAG) {
            $affiliate = \Affiliate\Model\AffiliateApi::getCurrentAffiliate();
            if ($affiliate['id']) {
                /**
                * @var \Shop\Model\Orm\Order
                */
                $order = $params['orm'];
                $order->addExtraInfoLine(
                    t('Выбранный город при оформлении'), 
                    $affiliate['title'], 
                    array('id' => $affiliate['id']), 
                    'affiliate'
                );
            }
        }
    }

{var_dump($order_extra)}

{$city=$order->getExtraKeyPair('affiliate')}
{var_dump($city)}

array(0) { }

{var_dump($order)}

 $order->addExtraInfoLine(
                    t('Выбранный город при оформлении'), 
                    $affiliate['title'], 
                    array('id' => $affiliate['id']), 
                    'affiliate'
                );

{$city= $order->getExtraKeyPair('affiliate')};
{*далее выводим город*}
{$city.title}