def get_value(self, ids=False): # all models are converted to IDs (aggregation routines yield IDs, so scalar meta return IDs for consistency) return simplify_tuple(tuple((model_to_id if ids else (lambda _:_))(getattr(self, f, None)) for f in self._value_fields()))
def _value_map(self, value, reverse=False):
if reverse:
return simplify_tuple(tuple(value[f] for f in self._value_fields()))
return dict(itertools.izip(self._value_fields(), ensure_tuple(value)))