Ticket #8106: queries.models.patch

regressiontests/queries/models.py

@@ -217 +217 @@
     a = models.ForeignKey(LeafA)
     b = models.ForeignKey(LeafB)
 
+
+# model hierarchy, for ticket #8106
+class User(models.Model):
+    name = models.CharField(max_length=200)
+    
+class Person(models.Model):
+    user = models.ForeignKey("User", unique=True)
+
+class Organizer(models.Model):
+    person = models.ForeignKey("Person")
+
+class Student(models.Model):
+    person = models.ForeignKey("Person")
+
+class Class(models.Model):
+    org = models.ForeignKey("Organizer")
+
+class Enrollment(models.Model):
+    std = models.ForeignKey("Student")
+    claz = models.ForeignKey("Class")
+
+
+
 __test__ = {'API_TESTS':"""
 >>> t1 = Tag.objects.create(name='t1')
 >>> t2 = Tag.objects.create(name='t2', parent=t1)
@@ -887 +910 @@
 >>> Celebrity.objects.count() == num_celebs
 True
 
+Bug #8106 -- 
+>>> us = User(name="std")
+>>> us.save()
+>>> usp = Person(user=us)
+>>> usp.save()
+
+>>> uo = User(name="org")
+>>> uo.save()
+>>> uop = Person(user=uo)
+>>> uop.save()
+
+>>> s = Student(person = usp)
+>>> s.save()
+>>> o = Organizer(person = uop)
+>>> o.save()
+
+>>> c = Class(org=o)
+>>> c.save()
+>>> e = Enrollment(std=s, claz=c)
+>>> e.save()
+
+>>> e_related = Enrollment.objects.all().select_related()[0]
+>>> print e_related.std.person.user.name
+std
+>>> print e_related.claz.org.person.user.name
+org
+
 """}
 
 # In Python 2.3, exceptions raised in __len__ are swallowed (Python issue