POSTing to an Action / Detail route on a Viewset

[Aaron]

I'd like to POST to a detail route on my Viewset:

class FooViewSet(
    mixins.ListModelMixin, mixins.RetrieveModelMixin, viewsets.GenericViewSet
):

    permission_classes = [IsAuthenticated]
    queryset = models.Foo.active_objects.all()
    serializer_class = serializers.FooSerializer

    @action(
        methods=["post"],
        detail=True,
        permission_classes=[IsAuthenticated],
        url_path="",
        url_name="purchase",
    )
    def do_foobar(self, request, pk=None):
       pass

EG: POST /foo/<fooID>/


I'm aware that ViewSets allow for the @action decorator:


@action( methods=["post"], detail=True, permission_classes=[IsAuthenticated], url_path="", url_name="foo", )


This however doesn't seem to allow the `url_path` field to be blank, so for example this works:


@action( methods=["post"], detail=True, permission_classes=[IsAuthenticated], url_path="foo", url_name="foo", )



But then requires my API to be structured like POST /store/<storeID>/foo



Is there a way to use an empty `url_path`? because just putting an empty string doesn't work.