// Generate order reference durring upgrade

install-dev/php/generate_order_reference.php

@@ -0,0 +1,14 @@
+<?php
+
+function generate_order_reference()
+{
+	// Get all orders
+	$orders = Db::getInstance()->executeS('SELECT id_order FROM '._DB_PREFIX_.'orders');
+	foreach ($orders as $order)
+	{
+		Db::getInstance()->execute('
+			UPDATE '._DB_PREFIX_.'orders
+			SET reference = \''.Order::generateReference().'\'
+			WHERE id_order = '.$order['id_order']);
+	}
+}

install-dev/sql/upgrade/1.5.0.2.sql

@@ -297,3 +297,6 @@ ALTER TABLE `PREFIX_order_cart_rule` ADD `value_tax_excl` DECIMAL(17, 2) NOT NUL
 ALTER TABLE `PREFIX_order_cart_rule` ADD `id_order_invoice` INT NOT NULL DEFAULT '0' AFTER `id_cart_rule`;
 
 ALTER TABLE `PREFIX_specific_price` ADD `id_group_shop` INT(11) UNSIGNED NOT NULL AFTER `id_shop`;
+
+/* Generate order references */
+/* PHP:generate_order_reference(); */;

install-dev/xml/doUpgrade.php

@@ -145,6 +145,8 @@ require_once(_PS_INSTALLER_PHP_UPGRADE_DIR_.'hook_blocksearch_on_header.php');
 
 require_once(_PS_INSTALLER_PHP_UPGRADE_DIR_.'update_order_canada.php');
 
+require_once(_PS_INSTALLER_PHP_UPGRADE_DIR_.'generate_order_reference.php');
+
 //old version detection
 global $oldversion, $logger;
 $oldversion = false;