gistfile1.py

class FranchiseUpdateView(viewsmixins.UpdateViewMixins):
    model = Franchise
    template_name = "franchise_update.html"
    success_url = reverse_lazy('franchises:list')
    form_class = FranchiseForm
    form_prefix = "franchise"

    # set prefix to parent form
    def get_form_kwargs(self):
        kwargs = super(FranchiseUpdateView, self).get_form_kwargs()
        if self.form_prefix:
            kwargs.update({'prefix': self.form_prefix})
        return kwargs