Thanks , all I needed to do was to create a new forms object again
if request.method =='POST' :
form = AssignMilestoneForm(request.POST,initial={'group':
my_group,'a':a1})
if form.is_valid()
...standard processing
form = AssignMilestoneForm(request.POST,initial={'group':
my_group,'a':a1})
and in form inside __init__ get selected_a from post parameters and
not initial parameters.
if 'a' in args[0]:
selected_a = args[0]['a']
On Apr 30, 6:42 pm, Doug Van Horn <[EMAIL PROTECTED]> wrote:
> 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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