Disable lookup_field in url

[fidoriel]

Hey,

if creating a UserView(mixins.RetrieveModelMixin, mixins.UpdateModelMixin, GenericViewSet)
where I want to let the user edit some settings like theme etc. The router always uses pk as queryparm. I do not want that to happen because I am operating on the user model wich I get from my request. lookup_field=False would be greate to tell the router to not create a lookup field. It would be greate to find a solution or new feature here.

Thanks