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Fixed #27482 -- Doc'd an example of Case() in QuerySet.filter().

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Jonatas CD 2016-11-15 12:54:45 +01:00 • committed by Tim Graham
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14
docs/ref/models/conditional-expressions.txt
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@ -141,6 +141,20 @@ the ``Client`` has been with us, we could do so using lookups::
both Jane Doe and Jack Black. This works just like an :keyword:`if` ...
:keyword:`elif` ... :keyword:`else` statement in ``Python``.
``Case()`` also works in a ``filter()`` clause. For example, to find gold
clients that registered more than a month ago and platinum clients that
registered more than a year ago::
>>> a_month_ago = date.today() - timedelta(days=30)
>>> a_year_ago = date.today() - timedelta(days=365)
>>> Client.objects.filter(
... registered_on__lte=Case(
... When(account_type=Client.GOLD, then=a_month_ago),
... When(account_type=Client.PLATINUM, then=a_year_ago),
... ),
... ).values_list('name', 'account_type')
[('Jack Black', 'P')]
Advanced queries
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