FormWizard doesn't work with FormSet/formset_factory()

[murraylchapman]

If you have a FormWizard step that generates a form(set) via FormSet.form_factory() then you end up with a mess where FormWizard drops a formtools.wizard.views.ManagementForm into the page but it's validated inside Django as if it's a django.forms.formset.ManagementForm.

This manifests as either a "management form has been messed with" error or an KeyError when FormSet.full_clean() does self.management_form.cleaned_data[TOTAL_FORM_COUNT].

I figured out that you can get around this by handing formset_factory a custom FormSet that overrides the non_form_errors() method, but it's a crude fix I'm not sure will be very portable.

IMHO FormWizard should provide a proper FormSet base class for use in formset_factory that creates management forms that will survive validation.