Fixed #20270 -- Fixed error in AjaxResponseMixin documentation

            return HttpResponse(data, **response_kwargs)

        def form_invalid(self, form):

            response = super(AjaxableResponseMixin, self).form_invalid(form)

            if self.request.is_ajax():

                return self.render_to_json_response(form.errors, status=400)

            else:

                return super(AjaxableResponseMixin, self).form_invalid(form)

                return response

        def form_valid(self, form):

            # We make sure to call the parent's form_valid() method because

            # it might do some processing (in the case of CreateView, it will

            # call form.save() for example).

            response = super(AjaxableResponseMixin, self).form_valid(form)

            if self.request.is_ajax():

                data = {

                    'pk': form.instance.pk,

                    'pk': self.object.pk,

                }

                return self.render_to_json_response(data)

            else:

                return super(AjaxableResponseMixin, self).form_valid(form)

                return response

    class AuthorCreate(AjaxableResponseMixin, CreateView):

        model = Author