Howto combine DjangoRestFramework routers for different apps

Question

I use Django 2.1 and DRF and a planning a quite larger application with many plugged-in apps. I'd like to have ONE /api URL for the DRF as endpoint, but allow each app to have a special model exposed over the REST endpoint, e.g.:

In the main urls.py:

router = routers.DefaultRouter()
router.register(r'users', UserViewSet)

urlpatterns = [
    # ...
    path('api/', include(router.urls)),
    # ...
]

and in foo_app/urls.py:

router = routers.DefaultRouter()
router.register(r'foomodel', FooModelViewSet)

Now, /api/foomodel produces a 404 Error. The foo_model/urls.py gets imported (a print statement there is printed at Django start), and all the other foo_model.urlpattern[path...] are recognized and work fine.

How can I define custom api model endpoints for a central api REST endpoint? I didn't find anything in the documentation.

Thanks in advance.

Answer 1

I simply achieved this by extending the router registries.

root urls.py

from ad.urls import router as ad_router

main_router = routers.DefaultRouter()
main_router.registry.extend(ad_router.registry)

ad.urls.py

from .api.urls import router as api_router

router = routers.DefaultRouter()
router.registry.extend(api_router.registry)

ad.api.urls.py

router = routers.DefaultRouter()
router.register(r'ad', AdViewSet)