Method _order_entity

lib/sqlalchemy/ext/orderinglist.py:344–355

(
        self, index: int, entity: _T, reorder: bool = True
    )

    _reorder = reorder

    def _order_entity(
        self, index: int, entity: _T, reorder: bool = True
    ) -> None:
        have = self._get_order_value(entity)

        # Don't disturb existing ordering if reorder is False
        if have is not None and not reorder:
            return

        should_be = self.ordering_func(index, self)
        if have != should_be:
            self._set_order_value(entity, should_be)

    def append(self, entity: _T) -> None:
        super().append(entity)