使用一个提交更新两个表单

Question

我有一个表单和formset。我想同时更新它们（使用相同的提交）。表单呈现正确（具有良好的数据），但更新的数据不会写入db。虚空形成验证工作。当它是一种形式时，它是完美的。哪个可能是问题？

我的观点类：

class EventAdminPage(UpdateView):
    form_class = CreateEventForm
    second_form_class = modelformset_factory(EventTime, form = EventTimeForm, min_num=1, validate_min=True, extra=3)
    model = Event
    template_name = 'eventAdmin.html'

    def get_context_data(self, **kwargs):
        context = super(EventAdminPage, self).get_context_data(**kwargs)
        event_times = EventTime.objects.filter(event = self.object).exclude(start_time = None)
        context['participants'] = Participant.objects.filter(event = self.object)
        context['event_times'] = EventTime.objects.filter(event = self.object).exclude(start_time = None)
        context['event_time_formset_helper'] = event_time_formset_helper = EventTimeFormsetHelper()
        context['formset'] = self.second_form_class(prefix='eventtime', queryset=event_times)
        context['form'] = self.form_class(instance = self.object)
        return context

    def post(self, request, **kwargs):
        self.object = self.get_object()
        event_times = EventTime.objects.filter(event = self.object).exclude(start_time = None)
        if 'update_event_form' in request.POST:
            form = self.form_class(instance=self.get_object())
            formset = self.second_form_class(queryset=event_times)
            if form.is_valid() and formset.is_valid():
                form.save()
                formset.save()
                return HttpResponseRedirect('/event-admin-%s' %self.kwargs['event_id']) 
            else:
                return self.render_to_response(
                    self.get_context_data(form=form, formset=formset))

    def get(self, request, **kwargs):
        self.object = Event.objects.get(pk=self.kwargs['event_id'])
        form = self.form_class
        formset = self.second_form_class
        context = self.get_context_data(object=self.object, form=form, formset=formset)
        return self.render_to_response(context)

    def get_object(self, queryset=None):
        obj = Event.objects.get(pk=self.kwargs['event_id'])
        return obj