--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/modeltests/proxy_models/models.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,164 @@
+"""
+By specifying the 'proxy' Meta attribute, model subclasses can specify that
+they will take data directly from the table of their base class table rather
+than using a new table of their own. This allows them to act as simple proxies,
+providing a modified interface to the data from the base class.
+"""
+
+from django.contrib.contenttypes.models import ContentType
+from django.db import models
+
+
+# A couple of managers for testing managing overriding in proxy model cases.
+
+class PersonManager(models.Manager):
+    def get_query_set(self):
+        return super(PersonManager, self).get_query_set().exclude(name="fred")
+
+class SubManager(models.Manager):
+    def get_query_set(self):
+        return super(SubManager, self).get_query_set().exclude(name="wilma")
+
+class Person(models.Model):
+    """
+    A simple concrete base class.
+    """
+    name = models.CharField(max_length=50)
+
+    objects = PersonManager()
+
+    def __unicode__(self):
+        return self.name
+
+class Abstract(models.Model):
+    """
+    A simple abstract base class, to be used for error checking.
+    """
+    data = models.CharField(max_length=10)
+
+    class Meta:
+        abstract = True
+
+class MyPerson(Person):
+    """
+    A proxy subclass, this should not get a new table. Overrides the default
+    manager.
+    """
+    class Meta:
+        proxy = True
+        ordering = ["name"]
+
+    objects = SubManager()
+    other = PersonManager()
+
+    def has_special_name(self):
+        return self.name.lower() == "special"
+
+class ManagerMixin(models.Model):
+    excluder = SubManager()
+
+    class Meta:
+        abstract = True
+
+class OtherPerson(Person, ManagerMixin):
+    """
+    A class with the default manager from Person, plus an secondary manager.
+    """
+    class Meta:
+        proxy = True
+        ordering = ["name"]
+
+class StatusPerson(MyPerson):
+    """
+    A non-proxy subclass of a proxy, it should get a new table.
+    """
+    status = models.CharField(max_length=80)
+
+# We can even have proxies of proxies (and subclass of those).
+class MyPersonProxy(MyPerson):
+    class Meta:
+        proxy = True
+
+class LowerStatusPerson(MyPersonProxy):
+    status = models.CharField(max_length=80)
+
+class User(models.Model):
+    name = models.CharField(max_length=100)
+
+    def __unicode__(self):
+        return self.name
+
+class UserProxy(User):
+    class Meta:
+        proxy = True
+
+class UserProxyProxy(UserProxy):
+    class Meta:
+        proxy = True
+
+# We can still use `select_related()` to include related models in our querysets.
+class Country(models.Model):
+    name = models.CharField(max_length=50)
+
+class State(models.Model):
+    name = models.CharField(max_length=50)
+    country = models.ForeignKey(Country)
+
+    def __unicode__(self):
+        return self.name
+
+class StateProxy(State):
+    class Meta:
+        proxy = True
+
+# Proxy models still works with filters (on related fields)
+# and select_related, even when mixed with model inheritance
+class BaseUser(models.Model):
+    name = models.CharField(max_length=255)
+
+class TrackerUser(BaseUser):
+    status = models.CharField(max_length=50)
+
+class ProxyTrackerUser(TrackerUser):
+    class Meta:
+        proxy = True
+
+
+class Issue(models.Model):
+    summary = models.CharField(max_length=255)
+    assignee = models.ForeignKey(TrackerUser)
+
+    def __unicode__(self):
+        return ':'.join((self.__class__.__name__,self.summary,))
+
+class Bug(Issue):
+    version = models.CharField(max_length=50)
+    reporter = models.ForeignKey(BaseUser)
+
+class ProxyBug(Bug):
+    """
+    Proxy of an inherited class
+    """
+    class Meta:
+        proxy = True
+
+
+class ProxyProxyBug(ProxyBug):
+    """
+    A proxy of proxy model with related field
+    """
+    class Meta:
+        proxy = True
+
+class Improvement(Issue):
+    """
+    A model that has relation to a proxy model
+    or to a proxy of proxy model
+    """
+    version = models.CharField(max_length=50)
+    reporter = models.ForeignKey(ProxyTrackerUser)
+    associated_bug = models.ForeignKey(ProxyProxyBug)
+
+class ProxyImprovement(Improvement):
+    class Meta:
+        proxy = True
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