queryset-refactor: Implemented the reverse() method on querysets.

Refs #5012.


git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@7148 bcc190cf-cafb-0310-a4f2-bffc1f526a37

2 files changed, 14 insertions, 6 deletions

diff --git a/tests/modeltests/ordering/models.py b/tests/modeltests/ordering/models.py
index 5f1c3c3b81..d7435f6f74 100644
--- a/tests/modeltests/ordering/models.py
+++ b/tests/modeltests/ordering/models.py
@@ -48,6 +48,13 @@ __test__ = {'API_TESTS':"""
 >>> Article.objects.order_by('pub_date', '-headline')
 [<Article: Article 1>, <Article: Article 3>, <Article: Article 2>, <Article: Article 4>]
 
+# Only the last order_by has any effect (since they each override any previous
+# ordering).
+>>> Article.objects.order_by('id')
+[<Article: Article 1>, <Article: Article 2>, <Article: Article 3>, <Article: Article 4>]
+>>> Article.objects.order_by('id').order_by('-headline')
+[<Article: Article 4>, <Article: Article 3>, <Article: Article 2>, <Article: Article 1>]
+
 # Use the 'stop' part of slicing notation to limit the results.
 >>> Article.objects.order_by('headline')[:2]
 [<Article: Article 1>, <Article: Article 2>]
@@ -65,10 +72,9 @@ __test__ = {'API_TESTS':"""
 >>> Article.objects.order_by('?')
 [...]
 
-# order_by() overrides any previous ordering, so only the last one has any
-# effect.
->>> Article.objects.order_by('id')
-[<Article: Article 1>, <Article: Article 2>, <Article: Article 3>, <Article: Article 4>]
->>> Article.objects.order_by('id').order_by('-headline')
-[<Article: Article 4>, <Article: Article 3>, <Article: Article 2>, <Article: Article 1>]
+# Ordering can be reversed using the reverse() method on a queryset. This
+# allows you to extract things like "the last two items" (reverse and then
+# take the first two).
+>>> Article.objects.all().reverse()[:2]
+[<Article: Article 1>, <Article: Article 3>]
 """}
diff --git a/tests/regressiontests/queries/models.py b/tests/regressiontests/queries/models.py
index 22fa4f7803..72f543dab8 100644
--- a/tests/regressiontests/queries/models.py
+++ b/tests/regressiontests/queries/models.py
@@ -317,6 +317,8 @@ Bug #5324
 [<Item: four>]
 >>> Item.objects.exclude(tags__name='t4').order_by('name').distinct()
 [<Item: one>, <Item: three>, <Item: two>]
+>>> Item.objects.exclude(tags__name='t4').order_by('name').distinct().reverse()
+[<Item: two>, <Item: three>, <Item: one>]
 >>> Author.objects.exclude(item__name='one').distinct().order_by('name')
 [<Author: a2>, <Author: a3>, <Author: a4>]