Fixed #12851 -- Corrected the loading of values when select_related() is used on inherited models. Thanks to phxx for the report and test case.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13054 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/select_related_regress/models.py

@@ -65,6 +65,9 @@ class Client(models.Model):
     state = models.ForeignKey(State, null=True)
     status = models.ForeignKey(ClientStatus)
 
+class SpecialClient(Client):
+    value = models.IntegerField()
+
 # Some model inheritance exercises
 class Parent(models.Model):
     name = models.CharField(max_length=10)
@@ -170,8 +173,28 @@ Exercising select_related() with multi-table model inheritance.
 >>> wa = State.objects.create(name="Western Australia", country=australia)
 >>> _ = Client.objects.create(name='Brian Burke', state=wa, status=active)
 >>> burke = Client.objects.select_related('state').defer('state__name').get(name='Brian Burke')
+>>> burke.name
+u'Brian Burke'
 >>> burke.state.name
 u'Western Australia'
 
-"""}
+# Still works if we're dealing with an inherited class
+>>> _ = SpecialClient.objects.create(name='Troy Buswell', state=wa, status=active, value=42)
+>>> troy = SpecialClient.objects.select_related('state').defer('state__name').get(name='Troy Buswell')
+>>> troy.name
+u'Troy Buswell'
+>>> troy.value
+42
+>>> troy.state.name
+u'Western Australia'
 
+# Still works if we defer an attribute on the inherited class
+>>> troy = SpecialClient.objects.select_related('state').defer('value', 'state__name').get(name='Troy Buswell')
+>>> troy.name
+u'Troy Buswell'
+>>> troy.value
+42
+>>> troy.state.name
+u'Western Australia'
+
+"""}