[Bug] Routing database query for {model} before branching support is initialized.

[stefanoparis-mgh]

Environment

Item	Version
NetBox version	e.g. 4.5.4
Plugin version	e.g. 2.0.2
netbox_custom_objects version	e.g. 0.4.6
Python version	e.g. 3.13.5

Steps to reproduce

Executing manage.py migrate / collectstatic

Expected behaviour

No warning

Actual behaviour

What actually happened.
/opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.CustomObjectTypeField'> before branching support is initialized.
warnings.warn(f"Routing database query for {model} before branching support is initialized.")
/opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To fix this warning, avoid executing queries in AppConfig.ready() or when your app modules are imported.
warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
/opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models.ContentType'> before branching support is initialized.
warnings.warn(f"Routing database query for {model} before branching support is initialized.")

Disabling plugin remove the warning

Mar 11 10:43:58 snipe-it gunicorn[30791]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30791]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30791]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30791]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30791]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30791]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30791]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30791]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30791]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models>
Mar 11 10:43:58 snipe-it gunicorn[30791]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30792]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30792]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30792]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30792]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30792]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30792]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30792]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30792]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30792]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models>
Mar 11 10:43:58 snipe-it gunicorn[30792]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30794]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30794]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30794]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30794]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30795]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30795]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30795]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30795]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30794]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30794]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30793]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30793]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30794]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30794]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30793]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30793]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:58 snipe-it gunicorn[30794]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models>
Mar 11 10:43:58 snipe-it gunicorn[30794]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30795]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:58 snipe-it gunicorn[30795]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:58 snipe-it gunicorn[30795]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:58 snipe-it gunicorn[30795]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:59 snipe-it gunicorn[30795]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models>
Mar 11 10:43:59 snipe-it gunicorn[30795]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:59 snipe-it gunicorn[30793]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'netbox_custom_objects.models.Custo>
Mar 11 10:43:59 snipe-it gunicorn[30793]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")
Mar 11 10:43:59 snipe-it gunicorn[30793]: /opt/netbox/venv/lib/python3.13/site-packages/django/db/backends/utils.py:98: RuntimeWarning: Accessing the database during app initialization is discouraged. To>
Mar 11 10:43:59 snipe-it gunicorn[30793]:   warnings.warn(self.APPS_NOT_READY_WARNING_MSG, category=RuntimeWarning)
Mar 11 10:43:59 snipe-it gunicorn[30793]: /opt/netbox/venv/lib/python3.13/site-packages/netbox_branching/database.py:27: UserWarning: Routing database query for <class 'django.contrib.contenttypes.models>
Mar 11 10:43:59 snipe-it gunicorn[30793]:   warnings.warn(f"Routing database query for {model} before branching support is initialized.")

[Kani999]

Hi, thanks for reporting this!

A fix is available as a beta release for testing:

pip install netbox-custom-objects-tab==2.1.1b1

PyPI: https://pypi.org/project/netbox-custom-objects-tab/2.1.1b1/

Note: This beta is currently only available for NetBox 4.5.4.

The fix defers the typed-tab DB queries (CustomObjectTypeField, ContentType) from AppConfig.ready() to the first HTTP request using Django's request_started signal. Combined tabs still register immediately (they don't need DB access). This eliminates both the Django and netbox_branching warnings.

PR: #7

Would appreciate it if you could test and confirm the warnings are gone in your environment!

[stefanoparis-mgh]

Perfect! No more warning messages!

Thanks for support