On Fri, Apr 13, 2012 at 1:08 PM, Massimo Barbierato
<ilgeniodelbas...@gmail.com> wrote:
> Hi all, i'm new. I searched in the group for answers to my problem, but i
> didn't find anything :(
>
> My problem is this:
>
> i have a model with two fields in unique_together, the related ModelForm and
> the view.
> When i pass an instance of my model to the form to update it and then save
> it, i receive an error that says me that there is already a row with the
> specified fields.
> I can't understand why.
>
> Here you can read my code: http://pastebin.com/vDiHvpiV
>
> Thanks a lot.
(I'm speculating a little)
In your code snippet, lines 36-38:
sale = None
if 'edit' in request.GET:
sale = Sales.objects.get(sale_id=request.GET['edit'])
When you submit the form again, 'edit' is not in request.GET, so
'sale' never gets a value. When you then subsequently save the form,
it tries to save a new instance, which fails because it already
matches a row in the database.
Cheers
Tom
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