Fix update notification deduplication and release link (#12424)

src/backend/InvenTree/InvenTree/tasks.py

@@ -856,6 +856,7 @@ def check_for_updates():
     data = json.loads(response.text)
 
     tag = data.get('tag_name', None)
+    release_url = data.get('html_url')
 
     if not tag:
         raise ValueError("'tag_name' missing from GitHub response")  # pragma: no cover
@@ -885,11 +886,13 @@ def check_for_updates():
         trigger_notification(
             None,
             'update_available',
+            notification_uid=0,
             targets=get_user_model().objects.filter(is_superuser=True),
             delivery_methods={InvenTreeUINotifications},
             context={
                 'name': _('Update Available'),
                 'message': _('An update for InvenTree is available'),
+                'link': release_url,
             },
         )
 

src/backend/InvenTree/InvenTree/test_tasks.py

@@ -2,6 +2,7 @@
 
 import os
 from datetime import timedelta
+from unittest.mock import patch
 
 from django.conf import settings
 from django.contrib.auth.models import User
@@ -11,6 +12,7 @@ from django.db.utils import NotSupportedError
 from django.test import TestCase
 from django.utils import timezone
 
+import requests_mock
 from django_q.models import OrmQ, Schedule, Task
 from error_report.models import Error
 
@@ -168,19 +170,57 @@ class InvenTreeTaskTests(PluginRegistryMixin, TestCase):
         errors = Error.objects.filter(when__lte=threshold)
         self.assertEqual(len(errors), 0)
 
-    def test_task_check_for_updates(self):
+    @requests_mock.Mocker()
-        """Test the task check_for_updates."""
+    def test_task_check_for_updates(self, requests_mocker):
-        # Check that setting should be empty
+        """Test update notification creation and deduplication."""
+        from common.models import NotificationEntry, NotificationMessage
+        from common.serializers import NotificationMessageSerializer
+
+        self.ensurePluginsLoaded(force=True)
+
+        user = User.objects.create_superuser(
+            username='update_admin',
+            email='update@example.com',
+            password='test-password',
+        )
+
+        release_url = 'https://github.com/InvenTree/InvenTree/releases/tag/99.99.99'
+
+        requests_mocker.get(
+            'https://api.github.com/repos/inventree/inventree/releases/latest',
+            json={'tag_name': '99.99.99', 'html_url': release_url},
+        )
+
         InvenTreeSetting.set_setting('_INVENTREE_LATEST_VERSION', '')
-        self.assertEqual(InvenTreeSetting.get_setting('_INVENTREE_LATEST_VERSION'), '')
 
-        # Get new version
+        with (
-        InvenTree.tasks.offload_task(InvenTree.tasks.check_for_updates)
+            patch(
+                'InvenTree.tasks.isInvenTreeUpToDate', return_value=False
+            ) as mock_up_to_date,
+            patch('InvenTree.tasks.check_daily_holdoff', return_value=True),
+        ):
+            InvenTree.tasks.check_for_updates()
 
-        # Check that setting is not empty
+            self.assertEqual(
-        response = InvenTreeSetting.get_setting('_INVENTREE_LATEST_VERSION')
+                InvenTreeSetting.get_setting('_INVENTREE_LATEST_VERSION'), '99.99.99'
-        self.assertNotEqual(response, '')
+            )
-        self.assertTrue(bool(response))
+            self.assertEqual(NotificationMessage.objects.count(), 1)
+            self.assertEqual(NotificationEntry.objects.count(), 1)
+
+            message = NotificationMessage.objects.get(user=user)
+            entry = NotificationEntry.objects.get()
+
+            self.assertEqual(message.link, release_url)
+            self.assertEqual(entry.uid, 0)
+
+            serialized = NotificationMessageSerializer(message).data
+            self.assertEqual(serialized['target']['link'], release_url)
+
+            InvenTree.tasks.check_for_updates()
+
+            self.assertEqual(NotificationMessage.objects.count(), 1)
+            self.assertEqual(NotificationEntry.objects.count(), 1)
+            mock_up_to_date.assert_called()
 
     def test_task_check_for_migrations(self):
         """Test the task check_for_migrations."""

src/backend/InvenTree/common/migrations/0048_notificationmessage_link.py

@@ -0,0 +1,24 @@
+"""Add link field to notification messages."""
+
+# Generated by Django 5.2.15 on 2026-07-20 01:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    """Add the optional notification link field."""
+
+    dependencies = [('common', '0047_parametertemplate_unique')]
+
+    operations = [
+        migrations.AddField(
+            model_name='notificationmessage',
+            name='link',
+            field=models.URLField(
+                blank=True,
+                help_text='Optional explicit URL associated with this notification',
+                max_length=500,
+                null=True,
+            ),
+        )
+    ]

src/backend/InvenTree/common/models.py

@@ -1723,6 +1723,13 @@ class NotificationMessage(models.Model):
 
     message = models.CharField(max_length=250, blank=True, null=True)
 
+    link = models.URLField(
+        max_length=500,
+        blank=True,
+        null=True,
+        help_text=_('Optional explicit URL associated with this notification'),
+    )
+
     creation = models.DateTimeField(auto_now_add=True)
 
     read = models.BooleanField(default=False)

src/backend/InvenTree/common/notifications.py

@@ -91,6 +91,7 @@ def trigger_notification(obj: Model, category: str = '', obj_ref: str = 'pk', **
         obj: The object (model instance) that is triggering the notification
         category: The category (label) for the notification
         obj_ref: The reference to the object that should be used for the notification
+        notification_uid: Explicit deduplication identifier for notifications without a model instance
         kwargs: Additional arguments to pass to the notification method
     """
     # Check if data is importing currently
@@ -105,6 +106,7 @@ def trigger_notification(obj: Model, category: str = '', obj_ref: str = 'pk', **
     context = kwargs.get('context', {})
     delivery_methods = kwargs.get('delivery_methods')
     check_recent = kwargs.get('check_recent', True)
+    notification_uid = kwargs.get('notification_uid')
 
     # Resolve object reference
     refs = [obj_ref, 'pk', 'id', 'uid']
@@ -122,6 +124,8 @@ def trigger_notification(obj: Model, category: str = '', obj_ref: str = 'pk', **
             raise KeyError(
                 f"Could not resolve an object reference for '{obj!s}' with {','.join(set(refs))}"
             )
+    elif notification_uid is not None:
+        obj_ref_value = notification_uid
 
     # Check if we have notified recently...
     delta = timedelta(days=1)

src/backend/InvenTree/common/serializers.py

@@ -318,7 +318,9 @@ class NotificationMessageSerializer(InvenTreeModelSerializer):
         """Function to resolve generic object reference to target."""
         target = get_objectreference(obj, 'target_content_type', 'target_object_id')
 
-        if target and 'link' not in target:
+        if target and obj.link:
+            target['link'] = obj.link
+        elif target and 'link' not in target:
             # Check if object has an absolute_url function
             if hasattr(obj.target_object, 'get_absolute_url'):
                 target['link'] = obj.target_object.get_absolute_url()

src/backend/InvenTree/plugin/builtin/integration/core_notifications.py

@@ -52,6 +52,7 @@ class InvenTreeUINotifications(NotificationMixin, InvenTreePlugin):
                     category=category,
                     name=ctx.get('name'),
                     message=ctx.get('message'),
+                    link=ctx.get('link'),
                 )
             )