http://chriskief.com/2012/12/30/django-class-based-views-with-multiple-forms/

views.py

from django.views.generic import UpdateView
from django.shortcuts import get_object_or_404
from django.core.urlresolvers import reverse_lazy
from app.models import Model
from app.forms import Form1, Form2


class MyView(UpdateView):

    template_name = 'template.html'
    form_class = Form1
    second_form_class = Form2
    success_url = reverse_lazy('success')

    def get_context_data(self, **kwargs):
        context = super(MyView, self).get_context_data(**kwargs)
        if 'form' not in context:
            context['form'] = self.form_class(initial={'some_field': context['model'].some_field})
        if 'form2' not in context:
            context['form2'] = self.second_form_class(initial={'another_field': context['model'].another_field})
        return context

    def get_object(self):
        return get_object_or_404(Model, pk=self.request.session['someval'])

    def form_invalid(self, **kwargs):
        return self.render_to_response(self.get_context_data(**kwargs))

    def post(self, request, *args, **kwargs):

        # get the user instance
        self.object = self.get_object()

        # determine which form is being submitted
        # uses the name of the form's submit button
        if 'form' in request.POST:

            # get the primary form
            form_class = self.get_form_class()
            form_name = 'form'

        else:

            # get the secondary form
            form_class = self.second_form_class
            form_name = 'form2'

        # get the form
        form = self.get_form(form_class)

        # validate
        if form.is_valid():
            return self.form_valid(form)
        else:
            return self.form_invalid(**{form_name: form})

What if you wanted to have multiple forms where they simply render on an HTML form and they all submit to one URL ?