Thank you. This worked well.
However, I'm left with this value
<EptInv: 80581770>
How do I get that into a comparable form?
On Nov 10, 4:06 pm, Łukasz Rekucki <lreku...@gmail.com> wrote:
> On 10 November 2010 21:55, Shawn Milochik <sh...@milochik.com> wrote:
>
> > The queryset returns zero or more instances of your model. So if
> > there's only one result, you can just get the first item in the
> > queryset by its index.
>
> > For example:
>
> > some_queryset = YourModel.objects.filter(**kwargs)
>
> > if some_queryset.count() == 1:
> > x = some_queryset[0]
> > #x is now an instance of your model.
> > else:
> > raise ValueError("%d results -- expected one!" % (some_queryset.count(),)
>
> This is a very bad way of checking queryset length, because count()
> actually creates a new QuerySet that gets executed (again!). Instead
> use len() that will first check against queryset's internal cache. In
> this special case of one element you can also write:
>
> try:
> elem = YourModel.objects.get(**params)
> except YourModel.DoesNotExists as e:
> # element was not found - do something with it
> pass
> except YourModel.MultipleObjectsReturned as e:
> # there was more then one object that matches given params - if
> params include a (primary) key this shouldn't happen
> pass
>
> --
> Łukasz Rekucki
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