On Thu, Dec 4, 2008 at 2:12 AM, cyberjack <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I haven't been able to solve this problem, but have made some
> progress:
>
> It's definitely *not* bug 9039. I've download the tests from that
> ticket and confirmed the fix was included in 1.0.2 final.
>
> The problem is related to using querysets with formset_factory. Ie,
> if I include a queryset filter, then I see this error. If I don't
> include a queryset, and thus edit all status reports, I don't see the
> error.
>
> Lastly, I've simplified my code producing the problem:
>
> my model:
>
> class StatusReport(models.Model):
> vehicle = models.IntegerField()
> report_date = models.DateField()
> status = models.CharField(max_length=10)
>
> and my view:
>
> def detail(request, vehicle_id):
> limited_reports = StatusReport.objects.filter(vehicle=vehicle_id)
>
> StatusFormSet = modelformset_factory(StatusReport, extra=0)
> if request.method == 'POST':
> formset = StatusFormSet(request.POST)
> if formset.is_valid():
> formset.save()
> else:
> # with error
> #formset = StatusFormSet(queryset=limited_reports)
> # without error
> formset = StatusFormSet()
> return render_to_response('manage_articles.html',
> {'formset': formset,
> 'vehicle_id': vehicle_id})
>
> Is this a bug in Django? If so, what should I include in the bug
> report?
>
I think the bug is that you need to pass the queryset parameter when you are
dealing with a POST (if you've specified it on the GET) so that the posted
data can be matched up to the existing model instances. Otherwise I think
it will be trying to validate and save as all new instances, and I think the
error message is saying you wind up with duplicate primary key ids when you
try that (though I will say that error message might could use some
improvement).
Karen
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