My solution is to use the base class parameter of form_for_[model|instance]
function, for example:
class SomeTest(models.Model):
name = models.CharField(maxlength=50)
user = models.ForeignKey(User)
class Meta:
unique_together = (('user', 'name'),)
class SomeTestBaseForm(forms.BaseForm):
def __init__(self, *args, **kwargs):
super(SomeTestBaseForm, self).__init__(*args, **kwargs)
def clean_name(self):
if self.data.get('name', None) and self.data.get('user', None):
try:
sometest = SomeTest.get(name=self.data['name'])
except SomeTest.DoesNotExist:
return self.data['name']
raise forms.ValidationError(u'The name already exists')
SomeTestForm = forms.form_for_model(SomeTest, SomeTestBaseForm)
this way you can add custom validation and DRY when your form's fields match
your model.
Regards,
Ali
On 5/29/07, ringemup <[EMAIL PROTECTED]> wrote:
>
>
> 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?
>
> Thanks!
>
>
> >
>
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