How to serialize django model using serpy? about serpy HOT 8 CLOSED

class BookmarkSerializer(serpy.Serializer):
    id = serpy.IntField()
    title = serpy.CharField()
    url = serpy.MethodField()

class PersonSerializer(serpy.Serializer):
    bookmarks = BookmarkSerializer(many=True)

bookmarks = serpy.MethodField()

def get_bookmarks(self, obj):
    # do interesting stuff with obj
    return somethinguseful

from functools import partial

from serpy import Serializer

class BaseSerializer(Serializer):
    def as_getter(self, serializer_field_name, serializer_cls):
        return partial(get_related, serializer_field_name)

def get_related(name, instance):
    value = getattr(instance, name, None)
    if value and is_related(instance._meta, value):
        value = value.all()
    return value

def is_related(opts, value):
    field = None
    if hasattr(value, 'field'):
        field = value.field
    if not field and hasattr(value, 'source_field'):
        field = value.source_field
    if field and hasattr(field, 'remote_field'):
        return (
            field.remote_field in related_fields(opts) or value.field in many_to_many_fields(opts)
        )
    return False

def related_fields(opts):
    return (
        f for f in opts.get_fields(include_hidden=True)
        if f.auto_created and not f.concrete and (f.one_to_one or f.one_to_many)
    )

def many_to_many_fields(opts):
    return (
        f for f in opts.get_fields(include_hidden=True)
        if f.many_to_many and f.auto_created
    )