Add/consumable mass action link associated items

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [UNRELEASED]
+
+### Added
+- Add grouped actions to link consumables and related items
+
 ## [2.12.8] - 2026-06-24
 
 ### Added

inc/link.class.php

@@ -633,7 +633,20 @@ public static function processMassiveActionsForOneItemtype(
                 break;
 
             case 'createLink':
-                if (count($ids) > 1) {
+                //  For consumables and cartridges, createLinkWithItem creates a new item
+                // (glpi_consumables/glpi_cartridges) for each selected detail line;
+                // therefore, multiple items can be linked to the same reference item at once
+                $allow_multiple_link = isset($ma->POST['add_items']) && $ma->POST['add_items'] !== [] && array_reduce(
+                    $ma->POST['add_items'],
+                    fn($carry, $data) => $carry && in_array(
+                        $data['itemtype'] ?? '',
+                        ['ConsumableItem', 'CartridgeItem'],
+                        true,
+                    ),
+                    true,
+                );
+
+                if (!$allow_multiple_link && count($ids) > 1) {
                     $ma->addMessage(__s("Cannot link several items to one detail line", "order"));
                     foreach ($ids as $id) {
                         $ma->itemDone($item->getType(), $id, MassiveAction::ACTION_KO);

inc/order.class.php

@@ -1825,7 +1825,6 @@ public function generateOrder($params)
             $this->getFromDB($ID);
 
             if (file_exists(PLUGIN_ORDER_TEMPLATE_CUSTOM_DIR . "custom.php")) {
-                // @phpstan-ignore-next-line: custom.php is not a file or it does not exist.
                 include_once(PLUGIN_ORDER_TEMPLATE_CUSTOM_DIR . "custom.php");
             }