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

Question

I have the following models:

class Bill(models.Model):
    date = models.DateTimeField(_("Date of bill"),null=True,blank=True)

class Item(models.Model):
    name = models.CharField(_("Name"),max_length=100)
    price = models.FloatField(_("Price"))
    quantity = models.IntegerField(_("Quantity"))
    bill = models.ForeignKey("Bill",verbose_name=_("Bill"),
                             related_name="billitem")

I know that this is possible:

from django.forms.models import inlineformset_factory
inlineformset_factory(Bill, Item)

and then process this via standard view.

Now I was wondering, if there is a way to achieve the same (meaning: using a inline for adding/editing items belonging to a bill) using class based views (not for the admin-interface).

Answer 1

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))