Missing expand query parameter when generating OpenAPI schema

[baojd42]

Currently there is an approach to automatically generate a OpenAPI schema using drf_spectacular, in which expand and omit are included in the query parameters. See #100

I tried this method, it works nicely for list methods, but for retrieve methods, there is still no expand or omit in the query parameters.

Is there anything I can do to make it also work for retrieve methods?

Thanks