意见

class Timetableadding(CreateView):
    model =  Timetable
    success_url = '/dashboard/'
    form_class = Timetableform
    template_name = 'form.html'


    def get_context_data(self, **kwargs):
        context = super(Timetableadding, self).get_context_data(**kwargs)
        context['formset'] = TimetableFormSet(queryset=Timetable.objects.none())
        context['day_form'] = DayForm()
        return context

    def post(self, request, *args, **kwargs):
        formset = TimetableFormSet(request.POST)
        day_form = DayForm(data=request.POST)
        if formset.is_valid() and day_form.is_valid():
            return self.form_valid(formset,day_form)

    def form_valid(self, formset,day_form):
        day = day_form.cleaned_data['day']
        instances = formset.save(commit=False)
        for instance in instances:
            instance.day = day
            instance.save()
        return HttpResponseRedirect('/dashboard/')

形式

class DayForm(Form):
    day = ModelChoiceField(queryset=Day.objects.all())


class Timetableform(ModelForm):
    class Meta:
        model = Timetable
        fields = ( 'day','start', 'end', 'period')

TimetableFormSet = modelformset_factory(Timetable, fields=('start', 'end', 'period'),extra=8,)

模板

{% csrf_token %}
{{ day_form }} <br>
{{ formset.management_form }}
{% for form in formset %}
{{ form }}<br><br>
{% endfor %}