Django Form Wizard, how to reset/clear wizard?

Question

I have created a Django Form Wizard which works fine. However, after finishing the wizard and starting it again, it loads the data generated during its previous use. Instead I would like it to clear the previous wizard state and start over once it was finished successful. I have tried modifying the done method of the wizard, but it doesn't do the trick:

def done(self, form_list, **kwargs):
    self.instance_dict = {}
    self.storage.reset()
    return HttpResponseRedirect('/foo/')

What do I have to change to make the wizard work the way I need it? My wizard extends the NamedUrlSessionWizardView class.

Answer 1

I am not 100% sure if this is true, but I think the following worked:

I was saving instances of forms in my wizard like this:

self.instance_dict['foo'] = foo

but for some reason

self.instance_dict = {}

didn't clear that data. Instead I moved to saving the objects in extra data:

self.storage.extra_data = {'foo' : foo}

Which I then retrieve inside the def get_form_instance(self, step) method of the wizard, for example like this:

def get_form_instance(self, step):
    ...
    if self.steps.current == 'foo' and self.storage.extra_data.has_key('foo'):
        return Bar.objects.filter(foo=self.storage.extra_data['foo'])
    ...

That data apparently got cleared successfully with the above mentioned done method. However, in the end I dropped the whole form-wizard thing due to more complications and just went with a one-step form.

Answer 2

It's really easy to reset the storage of a Form Wizard. I usually do that after the data processing is finished:

def done(self, form_list, form_dict, **kwargs):
    #do stuff with your form data
    self.instance_dict = None
    self.storage.reset()
    return redirect(reverse_lazy('somewhere'))

Or reset the Wizard after the redirect from another view

del request.session['wizard_name']