You want to create a BaseForm to specify in your form_for_model call.
You could do something like:
from django import newforms as forms
class MyBaseForm(forms.BaseForm):
def clean_myfield(self):
if
MyModel.objects.filter(myfield=self.cleaned_data['myfield']).count():
raise forms.ValidationError('some error message')
MyForm = forms.form_for_model(MyModel, form=MyBaseForm)
--------
Nathan Ostgard
On Jul 18, 7:06 am, stereoit <[EMAIL PROTECTED]> wrote:
> Hi,
> I have model with field that has attribute unique set to True. I know
> newforms are not able to handle such a validation as this is DB
> related. However I read at newforms doc page that it is possible to
> provide method called clean_<field>() that can do custom validation.
> My problem is that method is supposed to access the data via
> self.cleaned_date and I create form by using form_for_model hence I do
> not know how to write such a method.
>
> Can anyone point me to right direction or best practice? Handling this
> at form.save() seem not right to me.
>
> My idea was to create custom validation method that would try tu pull
> object from DB with <fieldname> set to same as in
> cleaned_data['fieldname'] and if it exists it would raise
> ValidationError. But I have no clue how to do that at the moment.
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