def formset_valid(self, formset):
        formset.save()
        messages.success(self.request, 'Your subscriptions have been updated.')
        return HttpResponseRedirect(self.get_success_url())
Message to show and action to do when a valid formset is sent
dataset/ETHPy150Open ofa/connect/open_connect/notifications/views.py/SubscriptionsUpdateView.formset_valid