Re: Adding a field to a form during runtime

[Marek W]

Thanks for your response. Probably the reason was I didn't update a
database, because now(after making syncdb) it works correctly. But by the
time I've found a second problem:

while to create a dynamic form this way:

def make_car_form(extra):
    fields = { 'carType' : forms.CharField() }
    if extra:
        fields['extraField'] = forms.CharField()
    return type('ContactForm', (forms.BaseForm, ), { 'base_fields': fields
})


View method:
(...)
    carForm = make_car_form(True)
(...)

then on the page there aren't any fields, whether calling make_car_form with
extra=True or extra=False.

Regards,
Marek

2009/3/18 Thomas Guettler <h...@tbz-pariv.de>

>
> Hi,
>
> your code looks correct.
>
> You can try to debug it. Maybe insert
>  assert False, self.fields into __init__()
> Do the fields from the model exist?
>
>  Thomas
>
> Marek W schrieb:
> > Hi, I would like to add a field to a form dynamically. I'm using Django
> > 1.0.2.
> >
> > Here's my view code:
> >
> > class CarForm(ModelForm):
> >     def __init__(self, *args, **kwargs):
> >         super(CarForm, self).__init__(*args, **kwargs)
> >         self.fields['extraField'] = forms.CharField()
> >
> >     class Meta:
> >         model = Car
> ...
>
> > I took this idea from
> > http://www.b-list.org/weblog/2008/nov/09/dynamic-forms/.  When I try to
> view
> > the page, when there's my own __init__ method in CarForm class, then the
> car
> > form doesn't contain any field. When i remove the __init__ method,
> > everything works correctly.  How to add a field to a form during a
> runtime ?
>
>
> --
> Thomas Guettler, http://www.thomas-guettler.de/
> E-Mail <http://www.thomas-guettler.de/%0AE-Mail>: guettli (*)
> thomas-guettler + de
>
> >
>


-- 
Pozdrawiam,

Marek Wawrzyczek

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