Auto schema on viewset without override all methods

decorator.py

from typing import Callable, List, ClassVar, Union
from rest_framework.views import APIView


# Inspired on https://stackoverflow.com/q/64185352
def auto_schema_once(*, names: Union[List[str], str], decorator: Callable, schemas: dict) -> Callable:
    if names == "__all__":
        names = ["create", "list", "retrieve", "destroy", "update", "partial_update"]

    def _decorator(cls: ClassVar[APIView]) -> ClassVar[APIView]:
        for name in names:
            method = getattr(cls, name)
            schema = schemas[name] if name in schemas else {}
            setattr(cls, name, decorator(**schema)(method))
        return cls

    return _decorator