Thanks a lot, V! That answers my question...
I agree with you at the architecture point... could you provide a URL
to documentation concerning specific form validation inside the admin
site?
Diogo
On May 27, 5:36 am, V <viktor.n...@gmail.com> wrote:
> On May 27, 5:56 am, Diogo Baeder <diogobae...@gmail.com> wrote:
>
> > Hi,
>
> > I've got two fields, in a model object: "from_date" and "to_date". How
> > can I make the admin controller or model validate if the "from_date"
> > field has always a lower value than "to_date"? Both are
> > "django.db.models.DateField", but how can I create a validation between
> > them?
>
> > Thanks!
>
> There are at least two answers to this questions :)
>
> First you can add this logic in your model's save method, and raise a
> ValueError if incoherent data gets there.
>
> def save(self, force_insert=False, force_update=False):
> if self.to_date<self.from_date:
> raise ValueError("You shouldn't get here with these data. Please
> contact someone!")
> super(MyModel, self).save(force_insert, force_update)
>
> Second, clearly, incoherent data should never get to the model level,
> but should be traped at form validation. So you should write a form
> that implements a clean method where you can check the dates. This
> holds true even if you submit the data only over the admin interface!
>
> V
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