How can I use different filter_schemas from derived class?

[aditya-arcana]

Suppose I have a base class like this:

class BaseAPI:
    ....
    filter_schema: Type[FilterSchema]
   
    def __init__(self):
        self.router = Router()
        self.register_routes()

    def register_routes(self):

        async def list_resources(
            request: HttpRequest,
            pagination_params: PaginationParams = Query(...),
            filters: AssetFilterSchema = Query(...),
        ) -> GenericListResponse:
           ....
           
        self.router.add_api_operation(
            path="/",
            methods=["GET"],
            view_func=list_resources,
            response=GenericListResponse[self.serializer],
        )

And I create a derived class:

class AssetAPI(BaseAPI):
   ...
   filter_schema = <Some filter schema>
   ...

Is there any way I can use the filter schema defined in child class in the parent class's list_resources function? Using self doesn't seem to work and without concrete value pydantic can't generate my schema

[vitalik]

yes, self.filter_schema should work inside BaseAPI

[aditya-arcana]

It actually doesn't seem to work here

filters: AssetFilterSchema # error if I try self.schema

since python doesn't allow self to used in type hints. This is probably not possible unless I'm missing something?

[baseplate-admin]

you can use

 filters: "AssetFilterSchema"