--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/modeltests/expressions/models.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,27 @@
+"""
+Tests for F() query expression syntax.
+"""
+
+from django.db import models
+
+class Employee(models.Model):
+    firstname = models.CharField(max_length=50)
+    lastname = models.CharField(max_length=50)
+
+    def __unicode__(self):
+        return u'%s %s' % (self.firstname, self.lastname)
+
+class Company(models.Model):
+    name = models.CharField(max_length=100)
+    num_employees = models.PositiveIntegerField()
+    num_chairs = models.PositiveIntegerField()
+    ceo = models.ForeignKey(
+        Employee,
+        related_name='company_ceo_set')
+    point_of_contact = models.ForeignKey(
+        Employee,
+        related_name='company_point_of_contact_set',
+        null=True)
+
+    def __unicode__(self):
+        return self.name