Thanks a lot.
I'd like to pass the dynamic value to the choices, like what you said
in the last situation.
Could you please give me some more instructions, I'm new in python and
django.
regards
Lee
On Jan 22, 11:21 pm, Malcolm Tredinnick <malc...@pointy-stick.com>
wrote:
> On Thu, 2009-01-22 at 03:54 -0800, Lee wrote:
> > Hi, Malcolm
>
> > Thanks for you reply. However, I'm still not clear.
>
> > My code is :
>
> > from django import forms
>
> > class TestForm(forms.Form):
> > title = forms.CharField( max_length=10 )
> > selection = forms.CharField( widget=forms.Select )
>
> > f = TestForm(initial={"title": 'Test', 'selection':{'1':'a','2':'b'}})
>
> Since you haven't specified any choices for the form field, this isn't
> going to be very useful. The initial values for any multiple choice
> field (like Select) have to be a subset of the choices that the field
> provides. Since your field provides precisely no choices, your initial
> data for the "selection" attribute will have no effect.
>
> The output you are seeing when you print this form is correct, based on
> what you have told the form you want.
>
> > print f
>
> > I want output like:
>
> > <option value="1">a</option>
> > <option value="2">b</option>
>
> For a start, that isn't a valid HTML form. The option elements have to
> be wrapped inside something. Do you mean that is what you are hoping to
> see for the "selection" field? If so, specifying some choices will
> certainly help things along.
>
> Either you have to write (just writing out the "selection" line):
>
> selection = forms.CharField(widget=forms.Select(
> choices={'1': 'a', '2': 'b'})
>
> or you need to set up the "choices" attribute as part of your form's
> __init__ method. By default, you cannot modify the choices for a form
> field via the constructor, only the initial values that are selected
> ("initial" for a form means the initial set values, not all the
> possibilities).
>
> Thus, if you want to pass in the choices, you have to write code to do
> that yourself. For example:
>
> class TestForm(forms.Form):
> def __init__(self, *args, **kwargs):
> choices = kwargs.pop('choices')
> super(TestForm, self).__init__(*args, **kwargs)
> self.fields["selection"].widget.choices = choices
>
> # ...
>
> and then TestForm(choices={...}) will set up the choices.
>
> Regards,
> Malcolm
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