ConfigError with Multiple NinjaAPI Instances in Django Project

[blazstefin]

In my Django project, I'm encountering a ConfigError when trying to register routes for a single instance of NinjaAPI. Despite only creating one API instance, the error suggests that multiple NinjaAPIs or TestClients are registered, requiring unique versioning or URL namespaces. This issue arises when including the API's URLs in the core.urls.py file.

Error:

Exception in thread django-main-thread:
Traceback (most recent call last):
...
ninja.errors.ConfigError: Looks like you created multiple NinjaAPIs or TestClients
To let ninja distinguish them you need to set either unique version or urls_namespace
- NinjaAPI(..., version='2.0.0')
- NinjaAPI(..., urls_namespace='otherapi')
Already registered: ['api-2.0']

Setup:

core/api.py

from ninja import NinjaAPI
from locations.api import router as locations_router

api = NinjaAPI(
    title="Locations API",
    version="2.0",
)

api.add_router("/locations/", locations_router)

locations/api.py

from ninja import Router

router = Router()
@router.get("/map_data", response=List[MarkerSchema])
@ratelimit(key=get_plain_ip, rate="20/m", block=True)
def get_map_data()...

core/urls.py

from django.urls import path
from core.api import api

urlpatterns = [
    path("api/", api.urls),
]

Expected Behavior:

The application should recognize the single instance of NinjaAPI without throwing a ConfigError about multiple instances.

Actual Behavior:

A ConfigError is raised, suggesting there are multiple NinjaAPI instances or TestClients, despite there being only one defined in the project.

Environment:

Django version= 4.2.7
Django Ninja version= 1.1.0