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Fixed #19326 -- Added first() and last() methods to QuerySet
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committed by
Anssi Kääriäinen
parent
d595b61aca
commit
ea9a0857d4
@@ -1585,6 +1585,36 @@ earliest
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Works otherwise like :meth:`~django.db.models.query.QuerySet.latest` except
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the direction is changed.
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first
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~~~~~
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.. method:: first()
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.. versionadded:: 1.6
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Returns the first object matched by the queryset, or ``None`` if there
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is no matching object. If the ``QuerySet`` has no ordering defined, then the
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queryset is automatically ordered by the primary key.
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Example::
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p = Article.objects.order_by('title', 'pub_date').first()
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Note that ``first()`` is a convenience method, the following code sample is
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equivalent to the above example::
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try:
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p = Article.objects.order_by('title', 'pub_date')[0]
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except IndexError:
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p = None
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last
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~~~~
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.. method:: last()
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.. versionadded:: 1.6
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Works like :meth:`first()` except the ordering is reversed.
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aggregate
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~~~~~~~~~
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@@ -253,6 +253,11 @@ Minor features
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allow users to specify the primary keys of objects they want to dump.
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This option can only be used with one model.
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* Added ``QuerySet`` methods :meth:`~django.db.models.query.QuerySet.first`
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and :meth:`~django.db.models.query.QuerySet.last` which are convenience
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methods returning the first or last object matching the filters. Returns
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``None`` if there are no objects matching.
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Backwards incompatible changes in 1.6
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=====================================
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