http://chriskief.com/2013/10/29/advanced-django-class-based-views-modelforms-and-ajax-example-tutorial/

view.py

from django.views.generic import UpdateView
from app.views.mixins.ajaxformresponse import AjaxFormResponseMixin
from app.forms.author import UpdateAuthorForm
from app.lib.shortcuts import get_object_or_json404
from app.models.author import Author


class AjaxAuthorUpdateView(AjaxFormResponseMixin, UpdateView):

    form_class = UpdateAuthorForm

    def get_object(self, queryset=None):
        return get_object_or_json404(Author, pk=self.kwargs['pk'])

    def get_context_data(self, context):
        context['success'] = True
        return context