Question

I don’t understand what’s happening, I have in my form
mylist = forms.MultipleChoiceField(required=False, widget=forms.SelectMultiple, label='MyList',help_text = "help")
I then have some jquery on the page that adds dynamic values to this, but when I submit the form I get form.is_valid to false “object has no attribute ‘cleaned_data'”

This seems to only happens when after i dynamically add values to the select box if I select some before submitting. If I don’t select values the cleaned_data[“mylist”] is empty array.

How do I fix this? Basically I want to access my dynamically added list of values from django form after submission.

edit
-----
    if request.method == 'POST':
        form = MyForm(request.POST)
        action = request.POST['submit']

        if action == 'Update':
                mylist = form.cleaned_data['mylist']
    else:
        form = MyForm()

edit

def clean_mylist(self):
    data = self.cleaned_data('mylist')
    return data


def clean(self):
    cleaned_data = self.cleaned_data
    return cleaned_data

Answer 1

When you submit the form MultipleChoiseField validates that all selected items belong to choises parameter of the MultipleChoiseField. If you dynamically later add fields they are naturally not in the choises set. Read more here.

As solution you could think of using CharField with SelectMultiple widget and override the clean-method.