def str_to_objectid(id: str) -> ObjectId:
    try:
        return ObjectId(id)
    except Exception:
        raise HTTPException(status_code=400, detail="Invalid ObjectId format")

class PyObjectId(ObjectId):
    @classmethod
    def __get_validators__(cls):
        yield cls.validate

    @classmethod
    def validate(cls, v):
        if not ObjectId.is_valid(v):
            raise ValueError("Invalid objectid")
        return str(v)