I think you'll have to sort the list yourself by creating a calculated
field, since you're only returning a small number, I don't see this as
a big issue.
So, get the records back that you want via the ORM, and then copy them
over to a list.
HTH
John
On Feb 20, 6:26 pm, shacker <shac...@birdhouse.org> wrote:
> Given a model like:
>
> class Item(models.Model):
> title = models.CharField(max_length=140)
> created_date =
> models.DateTimeField(default=datetime.datetime.now)
> completed = models.BooleanField(default=False)
> completed_date = models.DateTimeField(blank=True,null=True)
> ...
>
> I want to create a queryset that retrieves the last 30 Items that were
> either created OR completed most recently. In other words, the
> created_date and the completed_date fields need to be treated as if
> they were a single date field on the model, so that the returned items
> would be chronological by either date (completed_date would only be
> considered for items where completed=True)
>
> I've tried both:
>
> .order_by('-completed_date','-created_date')[:30]
>
> and
>
> .order_by('-completed_date').order_by('-created_date')[:30]
>
> but neither of these are quite right. Not sure what the right approach
> to this should be. Suggestions? Thanks.
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