Dumps cascade deleted items to fixtures. Can be used to restore accidentally deleted item from the backup

to_fixtures.py

from __future__ import unicode_literals

from django.apps import apps
from django.contrib.admin.utils import NestedObjects
from django.core import serializers
from django.core.exceptions import ObjectDoesNotExist
from django.utils.encoding import force_unicode


def restore(model, pk, srl_format='json'):
    try:
        model = apps.get_model(model)
    except LookupError:
        print 'Model "{}" does not exist'.format(force_unicode(model))
        return

    try:
        instance = model._default_manager.get(pk=pk)
    except ObjectDoesNotExist:
        print 'Object with pk {} does not exist'.format(force_unicode(pk))
        return

    collector = NestedObjects(using='default')
    collector.collect([instance])

    for cls, objects in collector.data.iteritems():
        opts = cls._meta.app_label, cls.__name__.lower()

        filename = '{}_{}.json'.format(*opts)

        with open(filename, b'w') as f:
            f.write(
                serializers.serialize(srl_format, objects)
            )