--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thirdparty/google_appengine/lib/django/tests/modeltests/m2m_recursive/models.py	Tue Aug 26 21:49:54 2008 +0000
@@ -0,0 +1,192 @@
+"""
+28. Many-to-many relationships between the same two tables
+
+In this example, A Person can have many friends, who are also people. Friendship is a
+symmetrical relationship - if I am your friend, you are my friend.
+
+A person can also have many idols - but while I may idolize you, you may not think
+the same of me. 'Idols' is an example of a non-symmetrical m2m field. Only recursive
+m2m fields may be non-symmetrical, and they are symmetrical by default.
+
+This test validates that the m2m table will create a mangled name for the m2m table if
+there will be a clash, and tests that symmetry is preserved where appropriate.
+"""
+
+from django.db import models
+
+class Person(models.Model):
+    name = models.CharField(maxlength=20)
+    friends = models.ManyToManyField('self')
+    idols = models.ManyToManyField('self', symmetrical=False, related_name='stalkers')
+
+    def __str__(self):
+        return self.name
+
+__test__ = {'API_TESTS':"""
+>>> a = Person(name='Anne')
+>>> a.save()
+>>> b = Person(name='Bill')
+>>> b.save()
+>>> c = Person(name='Chuck')
+>>> c.save()
+>>> d = Person(name='David')
+>>> d.save()
+
+# Add some friends in the direction of field definition
+# Anne is friends with Bill and Chuck
+>>> a.friends.add(b,c)
+
+# David is friends with Anne and Chuck - add in reverse direction
+>>> d.friends.add(a,c)
+
+# Who is friends with Anne?
+>>> a.friends.all()
+[<Person: Bill>, <Person: Chuck>, <Person: David>]
+
+# Who is friends with Bill?
+>>> b.friends.all()
+[<Person: Anne>]
+
+# Who is friends with Chuck?
+>>> c.friends.all()
+[<Person: Anne>, <Person: David>]
+
+# Who is friends with David?
+>>> d.friends.all()
+[<Person: Anne>, <Person: Chuck>]
+
+# Bill is already friends with Anne - add Anne again, but in the reverse direction
+>>> b.friends.add(a)
+
+# Who is friends with Anne?
+>>> a.friends.all()
+[<Person: Bill>, <Person: Chuck>, <Person: David>]
+
+# Who is friends with Bill?
+>>> b.friends.all()
+[<Person: Anne>]
+
+# Remove Anne from Bill's friends
+>>> b.friends.remove(a)
+
+# Who is friends with Anne?
+>>> a.friends.all()
+[<Person: Chuck>, <Person: David>]
+
+# Who is friends with Bill?
+>>> b.friends.all()
+[]
+
+# Clear Anne's group of friends
+>>> a.friends.clear()
+
+# Who is friends with Anne?
+>>> a.friends.all()
+[]
+
+# Reverse relationships should also be gone
+# Who is friends with Chuck?
+>>> c.friends.all()
+[<Person: David>]
+
+# Who is friends with David?
+>>> d.friends.all()
+[<Person: Chuck>]
+
+
+# Add some idols in the direction of field definition
+# Anne idolizes Bill and Chuck
+>>> a.idols.add(b,c)
+
+# Bill idolizes Anne right back
+>>> b.idols.add(a)
+
+# David is idolized by Anne and Chuck - add in reverse direction
+>>> d.stalkers.add(a,c)
+
+# Who are Anne's idols?
+>>> a.idols.all()
+[<Person: Bill>, <Person: Chuck>, <Person: David>]
+
+# Who is stalking Anne?
+>>> a.stalkers.all()
+[<Person: Bill>]
+
+# Who are Bill's idols?
+>>> b.idols.all()
+[<Person: Anne>]
+
+# Who is stalking Bill?
+>>> b.stalkers.all()
+[<Person: Anne>]
+
+# Who are Chuck's idols?
+>>> c.idols.all()
+[<Person: David>]
+
+# Who is stalking Chuck?
+>>> c.stalkers.all()
+[<Person: Anne>]
+
+# Who are David's idols?
+>>> d.idols.all()
+[]
+
+# Who is stalking David
+>>> d.stalkers.all()
+[<Person: Anne>, <Person: Chuck>]
+
+# Bill is already being stalked by Anne - add Anne again, but in the reverse direction
+>>> b.stalkers.add(a)
+
+# Who are Anne's idols?
+>>> a.idols.all()
+[<Person: Bill>, <Person: Chuck>, <Person: David>]
+
+# Who is stalking Anne?
+[<Person: Bill>]
+
+# Who are Bill's idols
+>>> b.idols.all()
+[<Person: Anne>]
+
+# Who is stalking Bill?
+>>> b.stalkers.all()
+[<Person: Anne>]
+
+# Remove Anne from Bill's list of stalkers
+>>> b.stalkers.remove(a)
+
+# Who are Anne's idols?
+>>> a.idols.all()
+[<Person: Chuck>, <Person: David>]
+
+# Who is stalking Anne?
+>>> a.stalkers.all()
+[<Person: Bill>]
+
+# Who are Bill's idols?
+>>> b.idols.all()
+[<Person: Anne>]
+
+# Who is stalking Bill?
+>>> b.stalkers.all()
+[]
+
+# Clear Anne's group of idols
+>>> a.idols.clear()
+
+# Who are Anne's idols
+>>> a.idols.all()
+[]
+
+# Reverse relationships should also be gone
+# Who is stalking Chuck?
+>>> c.stalkers.all()
+[]
+
+# Who is friends with David?
+>>> d.stalkers.all()
+[<Person: Chuck>]
+
+"""}