Django FormWizards: How to painlessly pass user-entered data between forms?

问题

I'm using the FormWizard functionality in Django 1.4.3.

I have successfully created a 4-step form. In the first 3 steps of the form it correctly takes information from the user, validates it, etc. In Step #4, it right now just shows a "Confirm" button. Nothing else. When you hit "Confirm" on step #4, does something useful with it in the done() function. So far it all works fine.

However, I would like to make it so that in step 4 (The confirmation step), it shows the user the data they have entered in the previous steps for their review. I'm trying to figure out the most painless way to make this happen. So far I am creating an entry in the context called formList which contains a list of forms that have already been completed.

class my4StepWizard(SessionWizardView):

    def get_template_names(self):
        return [myWizardTemplates[self.steps.current]]

    def get_context_data(self, form, **kwargs):
        context = super(my4StepWizard, self).get_context_data(form=form, **kwargs)
        formList = [self.get_form_list()[i[0]] for i in myWizardForms[:self.steps.step0]]

        context.update(
            {
                'formList': formList,
            }
        )
        return context        


    def done(self, form_list, **kwargs):
        # Do something here.
        return HttpResponseRedirect('/doneWizard')

Form #1 has an input field called myField. So in my template for step #4, I would like to do {{ formList.1.clean_myField }}. However, when I do that, I get the following error:

Exception Value:
'my4StepWizard' object has no attribute 'cleaned_data'

It seems that the forms I am putting into formList are unbounded. So they don't contain the user's data. Is there a fix I can use to get the data itself? I would really like to use the context to pass the data as I'm doing above.

回答1:

Try this:

def get_context_data(self, form, **kwargs):
    previous_data = {}
    current_step = self.steps.current # 0 for first form, 1 for the second form..

    if current_step == '3': # assuming no step is skipped, this will be the last form
        for count in range(3):
            previous_data[unicode(count)] = self.get_cleaned_data_for_step(unicode(count))

    context = super(my4StepWizard, self).get_context_data(form=form, **kwargs)
    context.update({'previous_cleaned_data':previous_data})
    return context

previous_data is a dictionary and its keys are the steps for the wizard (0 indexed). The item for each key is the cleaned_data for the form in the step which is the same as the key.

来源：https://stackoverflow.com/questions/14860392/django-formwizards-how-to-painlessly-pass-user-entered-data-between-forms