I could fix part of my problem: The formtools formwizard doc states for the us of modelformsets:
'WizardView supports ModelForms <http://docs.djangoproject.com/en/dev/topics/forms/modelforms/#module-django.forms.models> and ModelFormSets <http://docs.djangoproject.com/en/dev/topics/forms/modelforms/#model-formsets>. Additionally to initial_dict <http://django-formtools.readthedocs.org/en/latest/wizard.html#formtools.wizard.views.WizardView.initial_dict>, the as_view() <http://django-formtools.readthedocs.org/en/latest/wizard.html#formtools.wizard.views.WizardView.as_view> method takes an instance_dict argument that should contain model instances for steps based on ModelForm and querysets for steps based on ModelFormSet.' For me this does not make to much sense: Why should I specify model instances / querysets for steps basend on ModelForm / ModelFormSet? In the case of ModelFormSet, FormView seems to prepopulate the formset with all model instances from the database, causing half of my error above. Why has this behavior been chosen? I don't get it... Nevertheless, to fix this I added 'instance_dict = {'third': Task.objects.none()}' to the JobWizard. Still half of the error persists: Upon submitting the final formwizard-form, the *last* form in the TaskFormSet produces a 'RelatedObjectDoesNotExist' error for Step ('Task has no step'), even though it was preset by 'get_form_initial'. All other forms are saved without a problem. So what is special about the last form in the formset? Ugh... -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/ee0855ff-cc96-4cc4-89bb-553e99df4044%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
