how to access form's data in a django formset

Question

I have problem on accessing the form data from a formset. I attached the code:

####FORM
class ActionTypeForm(forms.Form):
     action_name = models.CharField(max_length=20)
     description = models.CharField(max_length=250, blank=True, null=True)


####VIEW
dataset = request.POST
ActionTypeFormSet = formset_factory(ActionTypeForm)
formset = ActionTypeFormSet(dataset)

if formset.is_valid():
     for form in formset.cleaned_data:  #I ALSO TESETED formset.forms
           customer.create_actiontype(form['action_name'], form['description'])

the error is I can't get form['action_name']. formset.is_valid() return True

ERROR

Exception Type: KeyError

Exception Value: 'action_name'

POST DATA

form-0-action_name u'a'

form-2-description u'sadsa'

form-0-description u'a'

form-MAX_NUM_FORMS u''

form-1-description u'asd'

form-TOTAL_FORMS u'3'

form-1-action_name u'as'

form-INITIAL_FORMS u'0'

csrfmiddlewaretoken u'c4fa9ddb4ec69ac639d7801eb14979f2'

form-2-action_name u'asda'

Yuji 'Tomita' Tomita · Accepted Answer · 2011-12-25 09:44:35Z

3

The main problem is that you have a blank form. You are using model fields in your form class definition, which django's forms framework has no idea what to do with. Django models != django forms.

The formset is validating and returning empty forms which of course have no form fields.

You should either create Formsets out of forms with valid form fields, or ModelFormsets out of Models.

Update: I initially thought that formsets don't have cleaned_data, but I guess they do return a list of cleaned_datas of all forms, which means the problem with your code is just the above.

edited Dec 25, 2011 at 9:44

answered Dec 25, 2011 at 7:55

Yuji 'Tomita' Tomita

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Comments

Filip Dupanović · Accepted Answer · 2011-12-25 09:57:24Z

0

The formset stores all it's associated forms in self.forms and iterating over it will return an iterator iter(self.forms) for the forms.

Your POST data looks good, so this is how you can make it work:

if formset.is_valid():
    for form in formset: 
        customer.create_actiontype(form.action_name, form.description)

answered Dec 25, 2011 at 9:57

Filip Dupanović

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1 Comment

Yuji 'Tomita' Tomita Over a year ago

This will throw an AttributeError, as forms don't implement their bound fields as attributes but via item indexing (form['action_name']) and finally the data itself will be in the cleaned_data dict.

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