#!/usr/bin/env python3
from marshmallow import fields, Schema
from marshmallow.utils import get_value, missing
from marshmallow.validate import OneOf

import uuid


class InfoSchema(Schema):
    id = fields.UUID(default=uuid.uuid4, missing=uuid.uuid4)
    target_class_name = fields.String()

    @classmethod  # This threats none values as missing
    def get_attribute(cls, attr, obj, default):
        return get_value(attr, obj, default=default) or missing