ordered_dict_serializer.py

class OrderedDictSerializer(serializers.ListSerializer):
    """
    django-rest-framework serializer that a list or queryset into an OrderedDict.
    """

    def to_representation(self, data):
        """
        OrderedDict of object instances -> OrderedDict of dicts of primitive datatypes.
        """
        # Dealing with nested relationships, data can be a Manager,
        # so, first get a queryset from the Manager if needed
        if isinstance(data, models.Manager):
            return OrderedDict([
                (item.pk, self.child.to_representation(item)) for item in data.all()
            ])
        else:
            return OrderedDict([
                (key, self.child.to_representation(item)) for key, item in data.items()
            ])