Method _chop_path

lib/sqlalchemy/orm/strategy_options.py:931–966

(
        cls,
        to_chop: _PathRepresentation,
        path: PathRegistry,
        debug: bool = False,
    )

    @classmethod
    def _chop_path(
        cls,
        to_chop: _PathRepresentation,
        path: PathRegistry,
        debug: bool = False,
    ) -> Optional[_PathRepresentation]:
        i = -1

        for i, (c_token, p_token) in enumerate(
            zip(to_chop, path.natural_path)
        ):
            if isinstance(c_token, str):
                if i == 0 and (
                    c_token.endswith(f":{_DEFAULT_TOKEN}")
                    or c_token.endswith(f":{_WILDCARD_TOKEN}")
                ):
                    return to_chop
                elif (
                    c_token != f"{_RELATIONSHIP_TOKEN}:{_WILDCARD_TOKEN}"
                    and c_token != p_token.key  # type: ignore
                ):
                    return None

            if c_token is p_token:
                continue
            elif (
                isinstance(c_token, InspectionAttr)
                and insp_is_mapper(c_token)
                and insp_is_mapper(p_token)
                and c_token.isa(p_token)
            ):
                continue

            else:
                return None
        return to_chop[i + 1 :]


class Load(_AbstractLoad):