It looks like you have it there in your snippet, you just need to
define your 'selected_a' var. Maybe something like:
if 'a1' in kwargs:
selected_a = kwargs['a1']
Then set your b1 choices based on the group and optional a attribute.
On Apr 30, 4:58 pm, ydjango <[EMAIL PROTECTED]> wrote:
> I have two choice fields in same form populated from two different
> tables - A and B. B has foreign key to A (A to B is one to many).
> Based on A value selected by user on page, I want to refresh and show
> corresponding B values.
>
> What is the best way to do it?
> Any links to snippets or code example will be appreaciated?
>
> (I am pre qryset refactor svn, but can upgrade if that helps.)
>
> thanks
> Ashish
>
> class AssignForm(forms.Form):
>
> def __init__(self, *args, **kwargs):
> my_group = kwargs['initial']['group']
> del kwargs['initial'] ['group']
> super(AssignForm, self).__init__(*args, **kwargs)
> self.fields['a1'].choices = [(a1.id,a1.name ) for a1 in
> A.objects.filter(group__exact=my_group)]
>
> self.fields['b1'].choices = [(b1.id,b1.name ) for b1 in
> B.objects.filter(group__exact=my_group, a__exact=selected_a)]
>
> a1 = forms.ChoiceField(widget=forms.Select(attrs=attrs_dict),
> required=False)
> b1= forms.ChoiceField(widget=forms.Select(attrs=attrs_dict),
> required=False)
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