From 427eb6d4b3e4217b1f21059ad28e06c8fee96d9a Mon Sep 17 00:00:00 2001
From: Oliver Walters <oliver.henry.walters@gmail.com>
Date: Sat, 4 Jul 2026 14:18:46 +0000
Subject: [PATCH] Implement duplicate action for stock item

---
 src/backend/InvenTree/stock/api.py           | 23 ++++++++++++++++++
 src/backend/InvenTree/stock/serializers.py   | 25 ++++++++++++++++++++
 src/frontend/src/forms/StockForms.tsx        | 25 +++++++++++++++++++-
 src/frontend/src/pages/stock/StockDetail.tsx |  3 ++-
 4 files changed, 74 insertions(+), 2 deletions(-)

diff --git a/src/backend/InvenTree/stock/api.py b/src/backend/InvenTree/stock/api.py
index 6557761651..dcefb7287b 100644
--- a/src/backend/InvenTree/stock/api.py
+++ b/src/backend/InvenTree/stock/api.py
@@ -1250,9 +1250,28 @@ class StockList(
         serializer = self.get_serializer(data=data)
         serializer.is_valid(raise_exception=True)
 
+        # Extract 'duplicate' options (if provided) - these are not valid model fields
+        duplicate = serializer.validated_data.pop('duplicate', None)
+
         # Extract location information
         location = serializer.validated_data.get('location', None)
 
+        def apply_duplicate_options(item):
+            """Apply any provided 'duplicate' options to a newly created StockItem."""
+            if not duplicate:
+                return
+
+            original = duplicate['original']
+
+            if duplicate.get('copy_notes', True):
+                item.copy_notes_from(original)
+
+            if duplicate.get('copy_history', False):
+                item.copyHistoryFrom(original)
+
+            if duplicate.get('copy_tests', False):
+                item.copyTestResultsFrom(original)
+
         with transaction.atomic():
             if serials:
                 # Create multiple serialized StockItem objects
@@ -1268,6 +1287,8 @@ class StockList(
                         item.set_status(status_value)
                         item.save()
 
+                    apply_duplicate_options(item)
+
                     if entry := item.add_tracking_entry(
                         StockHistoryCode.CREATED,
                         user,
@@ -1300,6 +1321,8 @@ class StockList(
                 item.save(user=user)
                 item.refresh_from_db()
 
+                apply_duplicate_options(item)
+
                 response_data = [
                     StockSerializers.StockItemSerializer(
                         item, context=self.get_serializer_context()
diff --git a/src/backend/InvenTree/stock/serializers.py b/src/backend/InvenTree/stock/serializers.py
index aeffc94001..836c7e414b 100644
--- a/src/backend/InvenTree/stock/serializers.py
+++ b/src/backend/InvenTree/stock/serializers.py
@@ -324,6 +324,8 @@ class StockItemSerializer(
 
     export_exclude_fields = ['tags', 'tracking_items']
 
+    SKIP_CREATE_FIELDS = ['duplicate']
+
     export_child_fields = [
         'part_detail.name',
         'part_detail.description',
@@ -380,6 +382,7 @@ class StockItemSerializer(
             'purchase_price_currency',
             'use_pack_size',
             'serial_numbers',
+            'duplicate',
             # Annotated fields
             'allocated',
             'expired',
@@ -467,6 +470,28 @@ class StockItemSerializer(
         help_text=_('Enter serial numbers for new items'),
     )
 
+    # Extra field used only for creation of a new StockItem instance
+    duplicate = InvenTree.serializers.DuplicateOptionsSerializer(
+        StockItem.objects.all(),
+        label=_('Duplicate Stock Item'),
+        help_text=_('Copy initial data from another stock item'),
+        copy_notes=True,
+        copy_fields=[
+            {
+                'name': 'copy_tests',
+                'label': _('Copy Test Results'),
+                'help_text': _('Copy test results from the original stock item'),
+                'default': False,
+            },
+            {
+                'name': 'copy_history',
+                'label': _('Copy History'),
+                'help_text': _('Copy stock history from the original stock item'),
+                'default': False,
+            },
+        ],
+    )
+
     def validate_part(self, part):
         """Ensure the provided Part instance is valid."""
         if part.virtual:
diff --git a/src/frontend/src/forms/StockForms.tsx b/src/frontend/src/forms/StockForms.tsx
index c8c253fd66..bfd0f228b6 100644
--- a/src/frontend/src/forms/StockForms.tsx
+++ b/src/frontend/src/forms/StockForms.tsx
@@ -27,6 +27,7 @@ import { modals } from '@mantine/modals';
 import {
   IconCalendarExclamation,
   IconCoins,
+  IconCopy,
   IconCurrencyDollar,
   IconLink,
   IconPackage,
@@ -81,7 +82,8 @@ export function useStockFields({
   create = false,
   supplierPartId,
   pricing,
-  modalId
+  modalId,
+  duplicateStockItem
 }: {
   partId?: number;
   stockItem?: any;
@@ -89,6 +91,7 @@ export function useStockFields({
   create: boolean;
   supplierPartId?: number;
   pricing?: { [priceBreak: number]: [number, string] };
+  duplicateStockItem?: any;
 }): ApiFormFieldSet {
   const globalSettings = useGlobalSettingsState();
 
@@ -301,6 +304,25 @@ export function useStockFields({
       delete fields.serial_numbers;
     }
 
+    // Additional fields for stock item duplication
+    if (create && duplicateStockItem?.pk) {
+      fields.duplicate = {
+        icon: <IconCopy />,
+        children: {
+          original: {
+            value: duplicateStockItem.pk,
+            hidden: true
+          },
+          copy_notes: { value: true },
+          copy_history: { value: false },
+          copy_tests: {
+            value: false,
+            hidden: !duplicateStockItem?.part_detail?.testable
+          }
+        }
+      };
+    }
+
     return fields;
   }, [
     stockItem,
@@ -315,6 +337,7 @@ export function useStockFields({
     purchasePriceCurrency,
     serialGenerator.result,
     batchGenerator.result,
+    duplicateStockItem,
     create
   ]);
 }
diff --git a/src/frontend/src/pages/stock/StockDetail.tsx b/src/frontend/src/pages/stock/StockDetail.tsx
index 5e118b4c6a..94e306ce8d 100644
--- a/src/frontend/src/pages/stock/StockDetail.tsx
+++ b/src/frontend/src/pages/stock/StockDetail.tsx
@@ -742,7 +742,8 @@ export default function StockDetail() {
 
   const duplicateStockItemFields = useStockFields({
     create: true,
-    modalId: 'duplicate-stock-item'
+    modalId: 'duplicate-stock-item',
+    duplicateStockItem: stockitem
   });
 
   const duplicateStockData = useMemo(() => {