Closes #11541: Support for limiting tag assignments by object type (#12982)

* Initial work on #11541

* Merge migrations

* Limit tags by object type during assignment

* Add tests for object type validation

* Fix form field parameters

netbox/extras/tests/test_filtersets.py

@@ -821,6 +821,10 @@ class TagTestCase(TestCase, ChangeLoggedFilterSetTests):
 
     @classmethod
     def setUpTestData(cls):
+        content_types = {
+            'site': ContentType.objects.get_by_natural_key('dcim', 'site'),
+            'provider': ContentType.objects.get_by_natural_key('circuits', 'provider'),
+        }
 
         tags = (
             Tag(name='Tag 1', slug='tag-1', color='ff0000', description='foobar1'),
@@ -828,6 +832,8 @@ class TagTestCase(TestCase, ChangeLoggedFilterSetTests):
             Tag(name='Tag 3', slug='tag-3', color='0000ff'),
         )
         Tag.objects.bulk_create(tags)
+        tags[0].object_types.add(content_types['site'])
+        tags[1].object_types.add(content_types['provider'])
 
         # Apply some tags so we can filter by content type
         site = Site.objects.create(name='Site 1', slug='site-1')
@@ -860,6 +866,18 @@ class TagTestCase(TestCase, ChangeLoggedFilterSetTests):
         params = {'content_type_id': [site_ct, provider_ct]}
         self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
 
+    def test_object_types(self):
+        params = {'for_object_type_id': [ContentType.objects.get_by_natural_key('dcim', 'site').pk]}
+        self.assertEqual(
+            list(self.filterset(params, self.queryset).qs.values_list('name', flat=True)),
+            ['Tag 1', 'Tag 3']
+        )
+        params = {'for_object_type_id': [ContentType.objects.get_by_natural_key('circuits', 'provider').pk]}
+        self.assertEqual(
+            list(self.filterset(params, self.queryset).qs.values_list('name', flat=True)),
+            ['Tag 2', 'Tag 3']
+        )
+
 
 class ObjectChangeTestCase(TestCase, BaseFilterSetTests):
     queryset = ObjectChange.objects.all()

netbox/extras/tests/test_models.py

@@ -1,8 +1,10 @@
+from django.contrib.contenttypes.models import ContentType
 from django.test import TestCase
 
 from dcim.models import Device, DeviceRole, DeviceType, Location, Manufacturer, Platform, Region, Site, SiteGroup
 from extras.models import ConfigContext, Tag
 from tenancy.models import Tenant, TenantGroup
+from utilities.exceptions import AbortRequest
 from virtualization.models import Cluster, ClusterGroup, ClusterType, VirtualMachine
 
 
@@ -14,6 +16,22 @@ class TagTest(TestCase):
 
         self.assertEqual(tag.slug, 'testing-unicode-台灣')
 
+    def test_object_type_validation(self):
+        region = Region.objects.create(name='Region 1', slug='region-1')
+        sitegroup = SiteGroup.objects.create(name='Site Group 1', slug='site-group-1')
+
+        # Create a Tag that can only be applied to Regions
+        tag = Tag.objects.create(name='Tag 1', slug='tag-1')
+        tag.object_types.add(ContentType.objects.get_by_natural_key('dcim', 'region'))
+
+        # Apply the Tag to a Region
+        region.tags.add(tag)
+        self.assertIn(tag, region.tags.all())
+
+        # Apply the Tag to a SiteGroup
+        with self.assertRaises(AbortRequest):
+            sitegroup.tags.add(tag)
+
 
 class ConfigContextTest(TestCase):
     """