Fixed #7302: Corrected quoting of columns in extra_group_by. Thanks to Ivan Sagalaev for the patch and initial test.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8794 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/sql/query.py

@@ -629,7 +629,7 @@ class Query(object):
                     result.append('%s %s' % (elt, order))
             else:
                 col, order = get_order_dir(field, asc)
-                elt = qn(col)
+                elt = qn2(col)
                 if distinct and elt not in select_aliases:
                     ordering_aliases.append(elt)
                 result.append('%s %s' % (elt, order))

tests/modeltests/ordering/models.py

@@ -77,4 +77,13 @@ __test__ = {'API_TESTS':"""
 # take the first two).
 >>> Article.objects.all().reverse()[:2]
 [<Article: Article 1>, <Article: Article 3>]
+
+# Ordering can be based on fields included from an 'extra' clause
+>>> Article.objects.extra(select={'foo': 'pub_date'}, order_by=['foo', 'headline'])
+[<Article: Article 1>, <Article: Article 2>, <Article: Article 3>, <Article: Article 4>]
+
+# If the extra clause uses an SQL keyword for a name, it will be protected by quoting.
+>>> Article.objects.extra(select={'order': 'pub_date'}, order_by=['order', 'headline'])
+[<Article: Article 1>, <Article: Article 2>, <Article: Article 3>, <Article: Article 4>]
+
 """}

tests/regressiontests/queries/models.py

@@ -220,6 +220,13 @@ class Join(models.Model):
     a = models.ForeignKey(LeafA)
     b = models.ForeignKey(LeafB)
 
+class ReservedName(models.Model):
+    name = models.CharField(max_length=20)
+    order = models.IntegerField()
+    
+    def __unicode__(self):
+        return self.name
+        
 __test__ = {'API_TESTS':"""
 >>> t1 = Tag.objects.create(name='t1')
 >>> t2 = Tag.objects.create(name='t2', parent=t1)
@@ -919,6 +926,15 @@ Bug #8597: regression tests for case-insensitive comparisons
 >>> Item.objects.filter(name__iendswith="A_b")
 [<Item: a_b>]
 
+Bug #7302: reserved names are appropriately escaped
+>>> _ = ReservedName.objects.create(name='a',order=42)
+>>> _ = ReservedName.objects.create(name='b',order=37)
+>>> ReservedName.objects.all().order_by('order')
+[<ReservedName: b>, <ReservedName: a>]
+
+>>> ReservedName.objects.extra(select={'stuff':'name'}, order_by=('order','stuff'))
+[<ReservedName: b>, <ReservedName: a>]
+ 
 """}
 
 # In Python 2.3 and the Python 2.6 beta releases, exceptions raised in __len__