base_resource.py 文件源码

def __getattr__(self, key):
        if key.startswith("_") or not key in self._meta.storage_attributes:
            raise AttributeError("Unknown attribute %s" % key)
        else:
            try:
                return self._storage_dict[key]
            except KeyError:
                attr = self._meta.storage_attributes[key]
                if attr.optional:
                    return None
                elif attr.default is not None:
                    if callable(attr.default):
                        return attr.default(self._storage_dict)
                    else:
                        return attr.default
                else:
                    log.error("Missing attribute %s, %s" % (key, self._storage_dict))
                    raise AttributeError("attribute %s not found" % key)