django class-based views with inline model-form or formset

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Key points is:

  1. generated FormSets within forms.py using inlineformset_factory:

    BookImageFormSet = inlineformset_factory(BookForm, BookImage, extra=2)
BookPageFormSet = inlineformset_factory(BookForm, BookPage, extra=5)

  2. returned the FormSets within a CreateView class in views.py:

    def get_context_data(self, **kwargs):
    context = super(BookCreateView, self).get_context_data(**kwargs)
    if self.request.POST:
        context['bookimage_form'] = BookImageFormSet(self.request.POST)
        context['bookpage_form'] = BookPageFormSet(self.request.POST)
    else:
        context['bookimage_form'] = BookImageFormSet()
        context['bookpage_form'] = BookPageFormSet()
    return context

  3. Used form_valid to save the form and formset:

     def form_valid(self, form):
     context = self.get_context_data()
     bookimage_form = context['bookimage_formset']
     bookpage_form = context['bookpage_formset']
     if bookimage_form.is_valid() and bookpage_form.is_valid():
         self.object = form.save()
         bookimage_form.instance = self.object
         bookimage_form.save()
         bookpage_form.instance = self.object
         bookpage_form.save()
         return HttpResponseRedirect('thanks/')
     else:
         return self.render_to_response(self.get_context_data(form=form))

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