+ attr_name = self.checked_class.to_save[-1]
+ attr = getattr(obj, attr_name)
+ if isinstance(attr, (int, float)):
+ setattr(obj, attr_name, attr + 1)
+ elif isinstance(attr, str):
+ setattr(obj, attr_name, attr + "_")
+ elif isinstance(attr, bool):
+ setattr(obj, attr_name, not attr)
+ obj.cache()
+ to_cmp = getattr(obj, attr_name)