diff -r 5ff1fc726848 -r c6bca38c1cbf parts/django/tests/modeltests/validation/models.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/modeltests/validation/models.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,65 @@
+from datetime import datetime
+from django.core.exceptions import ValidationError
+from django.db import models
+from django.test import TestCase
+
+
+def validate_answer_to_universe(value):
+    if value != 42:
+        raise ValidationError('This is not the answer to life, universe and everything!', code='not42')
+
+class ModelToValidate(models.Model):
+    name = models.CharField(max_length=100)
+    created = models.DateTimeField(default=datetime.now)
+    number = models.IntegerField(db_column='number_val')
+    parent = models.ForeignKey('self', blank=True, null=True, limit_choices_to={'number': 10})
+    email = models.EmailField(blank=True)
+    url = models.URLField(blank=True)
+    f_with_custom_validator = models.IntegerField(blank=True, null=True, validators=[validate_answer_to_universe])
+
+    def clean(self):
+        super(ModelToValidate, self).clean()
+        if self.number == 11:
+            raise ValidationError('Invalid number supplied!')
+
+class UniqueFieldsModel(models.Model):
+    unique_charfield = models.CharField(max_length=100, unique=True)
+    unique_integerfield = models.IntegerField(unique=True)
+    non_unique_field = models.IntegerField()
+
+class CustomPKModel(models.Model):
+    my_pk_field = models.CharField(max_length=100, primary_key=True)
+
+class UniqueTogetherModel(models.Model):
+    cfield = models.CharField(max_length=100)
+    ifield = models.IntegerField()
+    efield = models.EmailField()
+
+    class Meta:
+        unique_together = (('ifield', 'cfield',), ['ifield', 'efield'])
+
+class UniqueForDateModel(models.Model):
+    start_date = models.DateField()
+    end_date = models.DateTimeField()
+    count = models.IntegerField(unique_for_date="start_date", unique_for_year="end_date")
+    order = models.IntegerField(unique_for_month="end_date")
+    name = models.CharField(max_length=100)
+
+class CustomMessagesModel(models.Model):
+    other  = models.IntegerField(blank=True, null=True)
+    number = models.IntegerField(db_column='number_val',
+        error_messages={'null': 'NULL', 'not42': 'AAARGH', 'not_equal': '%s != me'},
+        validators=[validate_answer_to_universe]
+    )
+
+class Author(models.Model):
+    name = models.CharField(max_length=100)
+
+class Article(models.Model):
+    title = models.CharField(max_length=100)
+    author = models.ForeignKey(Author)
+    pub_date = models.DateTimeField(blank=True)
+
+    def clean(self):
+        if self.pub_date is None:
+            self.pub_date = datetime.now()