Patch django.core.signing.JSONSerializer to support mongodb ObjectId serialization.

jsonserializer.py

# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals
from bson import json_util as json


class JSONSerializer(object):
    """
    Simple wrapper around json to be used in signing.dumps and
    signing.loads.
    """
    def dumps(self, obj):
        return json.dumps(obj, separators=(',', ':')).encode('latin-1')

    def loads(self, data):
        return json.loads(data.decode('latin-1'))

import django.core.signing
# monkey patch it
django.core.signing.JSONSerializer = JSONSerializer