Method _getter

lib/sqlalchemy/engine/result.py:750–761

return a callable that will retrieve the given key from a :class:`_engine.Row`.

(
        self, key: _KeyIndexType, raiseerr: bool = True
    )

        return ScalarResult(self, index)

    def _getter(
        self, key: _KeyIndexType, raiseerr: bool = True
    ) -> Optional[Callable[[Row[Unpack[TupleAny]]], Any]]:
        """return a callable that will retrieve the given key from a
        :class:`_engine.Row`.

        """
        if self._source_supports_scalars:
            raise NotImplementedError(
                "can't use this function in 'only scalars' mode"
            )
        return self._metadata._getter(key, raiseerr)

    def _tuple_getter(self, keys: Sequence[_KeyIndexType]) -> _TupleGetterType:
        """return a callable that will retrieve the given keys from a