Fixed #8439 -- Complex combinations of Q-objects (using both conjunctions and

disjunctions) were producing incorrect SQL when nullable relations were
involved. This fixes that.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8832 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/queries/models.py

@@ -223,10 +223,10 @@ class Join(models.Model):
 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)
@@ -238,6 +238,11 @@ __test__ = {'API_TESTS':"""
 >>> n2 = Note.objects.create(note='n2', misc='bar')
 >>> n3 = Note.objects.create(note='n3', misc='foo')
 
+>>> ann1 = Annotation.objects.create(name='a1', tag=t1)
+>>> ann1.notes.add(n1)
+>>> ann2 = Annotation.objects.create(name='a2', tag=t4)
+>>> ann2.notes.add(n2, n3)
+
 Create these out of order so that sorting by 'id' will be different to sorting
 by 'info'. Helps detect some problems later.
 >>> e2 = ExtraInfo.objects.create(info='e2', note=n2)
@@ -842,8 +847,6 @@ unpickling.
 True
 
 Bug #7277
->>> ann1 = Annotation.objects.create(name='a1', tag=t1)
->>> ann1.notes.add(n1)
 >>> n1.annotation_set.filter(Q(tag=t5) | Q(tag__children=t5) | Q(tag__children__children=t5))
 [<Annotation: a1>]
 
@@ -931,10 +934,25 @@ Bug #7302: reserved names are appropriately escaped
 >>> _ = 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>]
- 
+
+Bug #8439 -- complex combinations of conjunctions, disjunctions and nullable
+relations.
+>>> Author.objects.filter(Q(item__note__extrainfo=e2)|Q(report=r1, name='xyz'))
+[<Author: a2>]
+>>> Author.objects.filter(Q(report=r1, name='xyz')|Q(item__note__extrainfo=e2))
+[<Author: a2>]
+>>> Annotation.objects.filter(Q(tag__parent=t1)|Q(notes__note='n1', name='a1'))
+[<Annotation: a1>]
+>>> xx = ExtraInfo.objects.create(info='xx', note=n3)
+>>> Note.objects.filter(Q(extrainfo__author=a1)|Q(extrainfo=xx))
+[<Note: n1>, <Note: n3>]
+>>> xx.delete()
+>>> q = Note.objects.filter(Q(extrainfo__author=a1)|Q(extrainfo=xx)).query
+>>> len([x[2] for x in q.alias_map.values() if x[2] == q.LOUTER and q.alias_refcount[x[1]]])
+1
+
 """}
 
 # In Python 2.3 and the Python 2.6 beta releases, exceptions raised in __len__