Warnings while generating OpenAPI Spec with drf-spectacular

[tiholic]

I'm using https://github.com/tfranzel/drf-spectacular for OpenAPI documentation.

Warning #6: could not derive type of path parameter "ballot_pk" because because it is untyped and obtaining queryset from <class 'polls_app.views.BallotPolls'> failed. consider adding a type to the path (e.g. <int:ballot_pk>) or annotating the parameter type with @extend_schema. defaulting to "string".

The same warning repeats to all nested viewsets. I could extend schema for each nested view, but if we have ability to configure the pk type for parent routes, it'd save so much of boilerplate configuration w.r.t @extend_schema!