From 51a63bc7a591288ac71c11b49fcea37fba6fc0c9 Mon Sep 17 00:00:00 2001
From: Jeremy Stretch <jstretch@netboxlabs.com>
Date: Tue, 29 Jul 2025 11:34:00 -0400
Subject: [PATCH] model_is_public() should return False for non-core &
 non-plugin models

---
 netbox/netbox/constants.py                 | 15 +++++++++++++++
 netbox/netbox/models/features.py           | 10 ++++++++++
 netbox/netbox/tests/test_model_features.py | 10 ++++++++++
 3 files changed, 35 insertions(+)

diff --git a/netbox/netbox/constants.py b/netbox/netbox/constants.py
index ad96a643d..75e0f4da6 100644
--- a/netbox/netbox/constants.py
+++ b/netbox/netbox/constants.py
@@ -1,3 +1,18 @@
+CORE_APPS = (
+    'account',
+    'circuits',
+    'core',
+    'dcim',
+    'extras',
+    'ipam',
+    'tenancy',
+    'users',
+    'utilities',
+    'virtualization',
+    'vpn',
+    'wireless',
+)
+
 # RQ queue names
 RQ_QUEUE_DEFAULT = 'default'
 RQ_QUEUE_HIGH = 'high'
diff --git a/netbox/netbox/models/features.py b/netbox/netbox/models/features.py
index 11f2a43bc..b71eecaaa 100644
--- a/netbox/netbox/models/features.py
+++ b/netbox/netbox/models/features.py
@@ -17,7 +17,9 @@ from extras.choices import *
 from extras.constants import CUSTOMFIELD_EMPTY_VALUES
 from extras.utils import is_taggable
 from netbox.config import get_config
+from netbox.constants import CORE_APPS
 from netbox.models.deletion import DeleteMixin
+from netbox.plugins import PluginConfig
 from netbox.registry import registry
 from netbox.signals import post_clean
 from utilities.json import CustomFieldJSONEncoder
@@ -651,6 +653,14 @@ registry['model_features'].update({
 
 
 def model_is_public(model):
+    """
+    Return True if the model is considered "public use;" otherwise return False.
+
+    All non-core and non-plugin models are excluded.
+    """
+    opts = model._meta
+    if opts.app_label not in CORE_APPS and not isinstance(opts.app_config, PluginConfig):
+        return False
     return not getattr(model, '_netbox_private', False)
 
 
diff --git a/netbox/netbox/tests/test_model_features.py b/netbox/netbox/tests/test_model_features.py
index 13934bff6..190c177ea 100644
--- a/netbox/netbox/tests/test_model_features.py
+++ b/netbox/netbox/tests/test_model_features.py
@@ -3,6 +3,8 @@ from django.test import TestCase
 from core.models import AutoSyncRecord, DataSource
 from extras.models import CustomLink
 from netbox.models.features import get_model_features, has_feature, model_is_public
+from netbox.tests.dummy_plugin.models import DummyModel
+from taggit.models import Tag
 
 
 class ModelFeaturesTestCase(TestCase):
@@ -19,6 +21,14 @@ class ModelFeaturesTestCase(TestCase):
         self.assertTrue(getattr(AutoSyncRecord, '_netbox_private'))
         self.assertFalse(model_is_public(AutoSyncRecord))
 
+        # Plugin model
+        self.assertFalse(hasattr(DummyModel, '_netbox_private'))
+        self.assertTrue(model_is_public(DummyModel))
+
+        # Non-core model
+        self.assertFalse(hasattr(Tag, '_netbox_private'))
+        self.assertFalse(model_is_public(Tag))
+
     def test_has_feature(self):
         """
         Test the functionality of the has_feature() utility function.