Hi Wolfram,
On Fri, 2007-11-23 at 14:05 +0100, Wolfram Kriesing wrote:
> I got an alike problem, I ran through the docs, mailing lists, etc.
> but no solution.
>
> I got:
>
> class LinkForm(forms.Form):
> TYPE_CHOICES = (
> ('user', _('User link')),
> ('url', _('Web link')),
> )
> type = forms.ChoiceField(choices=TYPE_CHOICES)
> user = forms.IntegerField(required=False)
> url = forms.URLField(required=False, initial='http://')
>
> I want to validate the url-field _only_ when the type-field is set to
> "url" otherwise I don't, and I also don't want to get errors thrown
> otherwise!
> But since the Field's clean() method is called first the URL always
> gets validated :-(
> So I have no chance to modify the url-Field to an empty string using
> the various clean-methods.
>
> Is overriding the __init__() and putting the logic in there my only chance?
> Or did I miss something here?
I'd create an CharField instead of an URLField and call the validation
functions in django.core.validators inside the Form.clean() method. That
way you can reuse the validation without any hackery on your part.
Matthias
--
http://spinlock.ch/blog/
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