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[1.7.x] Refs #24462 -- Emphasized that order_by() clears previous ordering.

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Backport of b9d9ab23bdcc404708aada664e718a9d56415ca3 from master
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Tim Graham 2015-03-13 15:40:25 -04:00
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commit f8ed647435
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docs/ref/models/querysets.txt
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@ -348,6 +348,11 @@ You can tell if a query is ordered or not by checking the
:attr:`.QuerySet.ordered` attribute, which will be ``True`` if the :attr:`.QuerySet.ordered` attribute, which will be ``True`` if the
``QuerySet`` has been ordered in any way. ``QuerySet`` has been ordered in any way.
Each ``order_by()`` call will clear any previous ordering. For example, this
query will be ordered by ``pub_date`` and not ``headline``::
Entry.objects.order_by('headline').order_by('pub_date')
.. warning:: .. warning::
Ordering is not a free operation. Each field you add to the ordering Ordering is not a free operation. Each field you add to the ordering