根据 storm model 生成 dict

Basemode.py

    def __iter__(self):
        valid_fields = (name for name in dir(self ) if name not in self.exclude_field and (not name.startswith("_")))
        for name in valid_fields:
            prop = getattr(self, name)
            if isinstance(prop, (unicode, int)):
                yield name, getattr(self, name)
            elif isinstance(prop, datetime):
                yield name, str(getattr(self, name))
            elif isinstance(prop, Reference):
                try:
                    yield name, dict(getattr(self, name))
                except:
                    print("%s contains None or not iterable" % name)
            elif isinstance(prop, BoundReferenceSet):
                for ref in prop:
                    yield name, dict(ref)