Serialize to type hinted response type first?

[PaleNeutron]

See here:

https://sqlmodel.tiangolo.com/tutorial/fastapi/relationships/#models-with-relationships

My example code

class StrategyWithPortfolios(StrategyWithCategory):

    portfolios: list[Portfolio] = []

@router.get("/all")
@cache(expire=60)
async def read_strategies(
    session: Session = Depends(get_session),
) -> list[StrategyWithPortfolios]:
    """
    get all Strategy
    """
    stmt = (
        session.query(Strategy)
        .options(
            joinedload(Strategy.portfolios).options(joinedload(Portfolio.investors))
        )
        .options(joinedload(Strategy.category).load_only(Category.name))
    )
    ret = stmt.all()
    ret = [StrategyWithPortfolios.model_validate(r) for r in ret]  # very important!!!!!
    return ret

The returned result is sqlalchemy orm class Strategy but the data structure I want to return is StrategyWithPortfolios.

The code works well without the line ret = [StrategyWithPortfolios.model_validate(r) for r in ret] and @cache(expire=60).

But if I add @cache(expire=60) it save fields only belong to Strategy not portfolios nor Category to redis.

Please serialize the returned result to given pydantic model before save it to backend.