Author: mtredinnick
Date: 2009-02-27 21:02:52 -0600 (Fri, 27 Feb 2009)
New Revision: 9917

Modified:
   django/branches/releases/1.0.X/django/db/models/sql/query.py
   django/branches/releases/1.0.X/tests/regressiontests/queries/models.py
Log:
[1.0.X] Fixed #10028 -- Fixed a problem when ordering by related models.

Some results were inadvertently being excluded if we were ordering across a
nullable relation which itself ordering by a non-nullable relation.

Backport of r9916 from trunk.

Modified: django/branches/releases/1.0.X/django/db/models/sql/query.py
===================================================================
--- django/branches/releases/1.0.X/django/db/models/sql/query.py        
2009-02-28 02:59:40 UTC (rev 9916)
+++ django/branches/releases/1.0.X/django/db/models/sql/query.py        
2009-02-28 03:02:52 UTC (rev 9917)
@@ -687,8 +687,9 @@
             # the model.
             self.ref_alias(alias)
 
-        # Must use left outer joins for nullable fields.
-        self.promote_alias_chain(joins)
+        # Must use left outer joins for nullable fields and their relations.
+        self.promote_alias_chain(joins,
+                self.alias_map[joins[0]][JOIN_TYPE] == self.LOUTER)
 
         # If we get to this point and the field is a relation to another model,
         # append the default ordering for that model.

Modified: django/branches/releases/1.0.X/tests/regressiontests/queries/models.py
===================================================================
--- django/branches/releases/1.0.X/tests/regressiontests/queries/models.py      
2009-02-28 02:59:40 UTC (rev 9916)
+++ django/branches/releases/1.0.X/tests/regressiontests/queries/models.py      
2009-02-28 03:02:52 UTC (rev 9917)
@@ -237,7 +237,33 @@
 class PointerB(models.Model):
     connection = models.ForeignKey(SharedConnection)
 
+# Multi-layer ordering
+class SingleObject(models.Model):
+    name = models.CharField(max_length=10)
 
+    class Meta:
+        ordering = ['name']
+
+    def __unicode__(self):
+        return self.name
+
+class RelatedObject(models.Model):
+    single = models.ForeignKey(SingleObject)
+
+    class Meta:
+        ordering = ['single']
+
+class Plaything(models.Model):
+    name = models.CharField(max_length=10)
+    others = models.ForeignKey(RelatedObject, null=True)
+
+    class Meta:
+        ordering = ['others']
+
+    def __unicode__(self):
+        return self.name
+
+
 __test__ = {'API_TESTS':"""
 >>> t1 = Tag.objects.create(name='t1')
 >>> t2 = Tag.objects.create(name='t2', parent=t1)


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