OrderModel example

$params = $this->prepareCreateOrderData($params);

        // Remove empty fields that are not-nullable in the s_order table, they will be set with an empty string by default         foreach (['comment', 'customerComment', 'internalComment', 'temporaryId', 'trackingCode', 'transactionId', 'referer'] as $key) {
            if (empty($params[$key])) {
                unset($params[$key]);
            }
        }

        // Create model         $order = new OrderModel();

        // Setting default values, necessary because of not-nullable table columns         $order->setComment('');
        $order->setCustomerComment('');
        $order->setInternalComment('');
        $order->setTemporaryId('');
        $order->setTransactionId('');
        $order->setTrackingCode('');
        $order->setReferer('');

        $order->fromArray($params);