Am Dienstag, 29. Mai 2007 21:19 schrieb ringemup:
> Hello --
>
> I'm using a basic form_for_model() form object for a model that has a
> unique=True constraint on a field other than the primary key.
>
> When validating submitted data, is there a reason the form check that
> that constraint hasn't been violated and throw a validation error?
> I'd like to be able to catch that input error and present a message to
> the user, instead of what's currently happening, which is that no
> error is thrown and when I try to save the data I get an integrity
> error, which is unrecoverable.
>
> Do I need to create a custom form class just to handle a uniqueness
> requirement?
Hi,
you can add custom validation methods to the class (either by subclassing
or by adding a bound method)
Example: ("file" is the attribute of the form/model)
def clean_file(self):
value = self.fields["file"].widget.value_from_datadict(self.data,
self.add_prefix("file"))
if not ...:
raise forms.ValidationError(u"...")
return value
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
