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diff --git a/parts/django/tests/regressiontests/model_fields/tests.py b/parts/django/tests/regressiontests/model_fields/tests.py
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+++ b/parts/django/tests/regressiontests/model_fields/tests.py
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+import datetime
+import unittest
+from decimal import Decimal
+
+import django.test
+from django import forms
+from django.db import models
+from django.core.exceptions import ValidationError
+
+from models import Foo, Bar, Whiz, BigD, BigS, Image, BigInt, Post, NullBooleanModel, BooleanModel
+
+# If PIL available, do these tests.
+if Image:
+    from imagefield import \
+            ImageFieldTests, \
+            ImageFieldTwoDimensionsTests, \
+            ImageFieldNoDimensionsTests, \
+            ImageFieldOneDimensionTests, \
+            ImageFieldDimensionsFirstTests, \
+            ImageFieldUsingFileTests, \
+            TwoImageFieldTests
+
+
+class BasicFieldTests(django.test.TestCase):
+    def test_show_hidden_initial(self):
+        """
+        Regression test for #12913. Make sure fields with choices respect
+        show_hidden_initial as a kwarg to models.Field.formfield()
+        """
+        choices = [(0, 0), (1, 1)]
+        model_field = models.Field(choices=choices)
+        form_field = model_field.formfield(show_hidden_initial=True)
+        self.assertTrue(form_field.show_hidden_initial)
+
+        form_field = model_field.formfield(show_hidden_initial=False)
+        self.assertFalse(form_field.show_hidden_initial)
+
+    def test_nullbooleanfield_blank(self):
+        """
+        Regression test for #13071: NullBooleanField should not throw
+        a validation error when given a value of None.
+
+        """
+        nullboolean = NullBooleanModel(nbfield=None)
+        try:
+            nullboolean.full_clean()
+        except ValidationError, e:
+            self.fail("NullBooleanField failed validation with value of None: %s" % e.messages)
+
+class DecimalFieldTests(django.test.TestCase):
+    def test_to_python(self):
+        f = models.DecimalField(max_digits=4, decimal_places=2)
+        self.assertEqual(f.to_python(3), Decimal("3"))
+        self.assertEqual(f.to_python("3.14"), Decimal("3.14"))
+        self.assertRaises(ValidationError, f.to_python, "abc")
+
+    def test_default(self):
+        f = models.DecimalField(default=Decimal("0.00"))
+        self.assertEqual(f.get_default(), Decimal("0.00"))
+
+    def test_format(self):
+        f = models.DecimalField(max_digits=5, decimal_places=1)
+        self.assertEqual(f._format(f.to_python(2)), u'2.0')
+        self.assertEqual(f._format(f.to_python('2.6')), u'2.6')
+        self.assertEqual(f._format(None), None)
+
+    def test_get_db_prep_lookup(self):
+        from django.db import connection
+        f = models.DecimalField(max_digits=5, decimal_places=1)
+        self.assertEqual(f.get_db_prep_lookup('exact', None, connection=connection), [None])
+
+    def test_filter_with_strings(self):
+        """
+        We should be able to filter decimal fields using strings (#8023)
+        """
+        Foo.objects.create(id=1, a='abc', d=Decimal("12.34"))
+        self.assertEqual(list(Foo.objects.filter(d=u'1.23')), [])
+
+    def test_save_without_float_conversion(self):
+        """
+        Ensure decimals don't go through a corrupting float conversion during
+        save (#5079).
+        """
+        bd = BigD(d="12.9")
+        bd.save()
+        bd = BigD.objects.get(pk=bd.pk)
+        self.assertEqual(bd.d, Decimal("12.9"))
+
+    def test_lookup_really_big_value(self):
+        """
+        Ensure that really big values can be used in a filter statement, even
+        with older Python versions.
+        """
+        # This should not crash. That counts as a win for our purposes.
+        Foo.objects.filter(d__gte=100000000000)
+
+class ForeignKeyTests(django.test.TestCase):
+    def test_callable_default(self):
+        """Test the use of a lazy callable for ForeignKey.default"""
+        a = Foo.objects.create(id=1, a='abc', d=Decimal("12.34"))
+        b = Bar.objects.create(b="bcd")
+        self.assertEqual(b.a, a)
+
+class DateTimeFieldTests(unittest.TestCase):
+    def test_datetimefield_to_python_usecs(self):
+        """DateTimeField.to_python should support usecs"""
+        f = models.DateTimeField()
+        self.assertEqual(f.to_python('2001-01-02 03:04:05.000006'),
+                         datetime.datetime(2001, 1, 2, 3, 4, 5, 6))
+        self.assertEqual(f.to_python('2001-01-02 03:04:05.999999'),
+                         datetime.datetime(2001, 1, 2, 3, 4, 5, 999999))
+
+    def test_timefield_to_python_usecs(self):
+        """TimeField.to_python should support usecs"""
+        f = models.TimeField()
+        self.assertEqual(f.to_python('01:02:03.000004'),
+                         datetime.time(1, 2, 3, 4))
+        self.assertEqual(f.to_python('01:02:03.999999'),
+                         datetime.time(1, 2, 3, 999999))
+
+class BooleanFieldTests(unittest.TestCase):
+    def _test_get_db_prep_lookup(self, f):
+        from django.db import connection
+        self.assertEqual(f.get_db_prep_lookup('exact', True, connection=connection), [True])
+        self.assertEqual(f.get_db_prep_lookup('exact', '1', connection=connection), [True])
+        self.assertEqual(f.get_db_prep_lookup('exact', 1, connection=connection), [True])
+        self.assertEqual(f.get_db_prep_lookup('exact', False, connection=connection), [False])
+        self.assertEqual(f.get_db_prep_lookup('exact', '0', connection=connection), [False])
+        self.assertEqual(f.get_db_prep_lookup('exact', 0, connection=connection), [False])
+        self.assertEqual(f.get_db_prep_lookup('exact', None, connection=connection), [None])
+
+    def _test_to_python(self, f):
+        self.assertTrue(f.to_python(1) is True)
+        self.assertTrue(f.to_python(0) is False)
+
+    def test_booleanfield_get_db_prep_lookup(self):
+        self._test_get_db_prep_lookup(models.BooleanField())
+
+    def test_nullbooleanfield_get_db_prep_lookup(self):
+        self._test_get_db_prep_lookup(models.NullBooleanField())
+
+    def test_booleanfield_to_python(self):
+        self._test_to_python(models.BooleanField())
+
+    def test_nullbooleanfield_to_python(self):
+        self._test_to_python(models.NullBooleanField())
+
+    def test_booleanfield_choices_blank(self):
+        """
+        Test that BooleanField with choices and defaults doesn't generate a
+        formfield with the blank option (#9640, #10549).
+        """
+        choices = [(1, u'Si'), (2, 'No')]
+        f = models.BooleanField(choices=choices, default=1, null=True)
+        self.assertEqual(f.formfield().choices, [('', '---------')] + choices)
+
+        f = models.BooleanField(choices=choices, default=1, null=False)
+        self.assertEqual(f.formfield().choices, choices)
+
+    def test_return_type(self):
+        b = BooleanModel()
+        b.bfield = True
+        b.save()
+        b2 = BooleanModel.objects.get(pk=b.pk)
+        self.assertTrue(isinstance(b2.bfield, bool))
+        self.assertEqual(b2.bfield, True)
+
+        b3 = BooleanModel()
+        b3.bfield = False
+        b3.save()
+        b4 = BooleanModel.objects.get(pk=b3.pk)
+        self.assertTrue(isinstance(b4.bfield, bool))
+        self.assertEqual(b4.bfield, False)
+
+        b = NullBooleanModel()
+        b.nbfield = True
+        b.save()
+        b2 = NullBooleanModel.objects.get(pk=b.pk)
+        self.assertTrue(isinstance(b2.nbfield, bool))
+        self.assertEqual(b2.nbfield, True)
+
+        b3 = NullBooleanModel()
+        b3.nbfield = False
+        b3.save()
+        b4 = NullBooleanModel.objects.get(pk=b3.pk)
+        self.assertTrue(isinstance(b4.nbfield, bool))
+        self.assertEqual(b4.nbfield, False)
+
+        # http://code.djangoproject.com/ticket/13293
+        # Verify that when an extra clause exists, the boolean
+        # conversions are applied with an offset
+        b5 = BooleanModel.objects.all().extra(
+            select={'string_length': 'LENGTH(string)'})[0]
+        self.assertFalse(isinstance(b5.pk, bool))
+
+class ChoicesTests(django.test.TestCase):
+    def test_choices_and_field_display(self):
+        """
+        Check that get_choices and get_flatchoices interact with
+        get_FIELD_display to return the expected values (#7913).
+        """
+        self.assertEqual(Whiz(c=1).get_c_display(), 'First')    # A nested value
+        self.assertEqual(Whiz(c=0).get_c_display(), 'Other')    # A top level value
+        self.assertEqual(Whiz(c=9).get_c_display(), 9)          # Invalid value
+        self.assertEqual(Whiz(c=None).get_c_display(), None)    # Blank value
+        self.assertEqual(Whiz(c='').get_c_display(), '')        # Empty value
+
+class SlugFieldTests(django.test.TestCase):
+    def test_slugfield_max_length(self):
+        """
+        Make sure SlugField honors max_length (#9706)
+        """
+        bs = BigS.objects.create(s = 'slug'*50)
+        bs = BigS.objects.get(pk=bs.pk)
+        self.assertEqual(bs.s, 'slug'*50)
+
+
+class ValidationTest(django.test.TestCase):
+    def test_charfield_raises_error_on_empty_string(self):
+        f = models.CharField()
+        self.assertRaises(ValidationError, f.clean, "", None)
+
+    def test_charfield_cleans_empty_string_when_blank_true(self):
+        f = models.CharField(blank=True)
+        self.assertEqual('', f.clean('', None))
+
+    def test_integerfield_cleans_valid_string(self):
+        f = models.IntegerField()
+        self.assertEqual(2, f.clean('2', None))
+
+    def test_integerfield_raises_error_on_invalid_intput(self):
+        f = models.IntegerField()
+        self.assertRaises(ValidationError, f.clean, "a", None)
+
+    def test_charfield_with_choices_cleans_valid_choice(self):
+        f = models.CharField(max_length=1, choices=[('a','A'), ('b','B')])
+        self.assertEqual('a', f.clean('a', None))
+
+    def test_charfield_with_choices_raises_error_on_invalid_choice(self):
+        f = models.CharField(choices=[('a','A'), ('b','B')])
+        self.assertRaises(ValidationError, f.clean, "not a", None)
+
+    def test_choices_validation_supports_named_groups(self):
+        f = models.IntegerField(choices=(('group',((10,'A'),(20,'B'))),(30,'C')))
+        self.assertEqual(10, f.clean(10, None))
+
+    def test_nullable_integerfield_raises_error_with_blank_false(self):
+        f = models.IntegerField(null=True, blank=False)
+        self.assertRaises(ValidationError, f.clean, None, None)
+
+    def test_nullable_integerfield_cleans_none_on_null_and_blank_true(self):
+        f = models.IntegerField(null=True, blank=True)
+        self.assertEqual(None, f.clean(None, None))
+
+    def test_integerfield_raises_error_on_empty_input(self):
+        f = models.IntegerField(null=False)
+        self.assertRaises(ValidationError, f.clean, None, None)
+        self.assertRaises(ValidationError, f.clean, '', None)
+
+    def test_charfield_raises_error_on_empty_input(self):
+        f = models.CharField(null=False)
+        self.assertRaises(ValidationError, f.clean, None, None)
+
+    def test_datefield_cleans_date(self):
+        f = models.DateField()
+        self.assertEqual(datetime.date(2008, 10, 10), f.clean('2008-10-10', None))
+
+    def test_boolean_field_doesnt_accept_empty_input(self):
+        f = models.BooleanField()
+        self.assertRaises(ValidationError, f.clean, None, None)
+
+
+class BigIntegerFieldTests(django.test.TestCase):
+    def test_limits(self):
+        # Ensure that values that are right at the limits can be saved
+        # and then retrieved without corruption.
+        maxval = 9223372036854775807
+        minval = -maxval - 1
+        BigInt.objects.create(value=maxval)
+        qs = BigInt.objects.filter(value__gte=maxval)
+        self.assertEqual(qs.count(), 1)
+        self.assertEqual(qs[0].value, maxval)
+        BigInt.objects.create(value=minval)
+        qs = BigInt.objects.filter(value__lte=minval)
+        self.assertEqual(qs.count(), 1)
+        self.assertEqual(qs[0].value, minval)
+
+    def test_types(self):
+        b = BigInt(value = 0)
+        self.assertTrue(isinstance(b.value, (int, long)))
+        b.save()
+        self.assertTrue(isinstance(b.value, (int, long)))
+        b = BigInt.objects.all()[0]
+        self.assertTrue(isinstance(b.value, (int, long)))
+
+    def test_coercing(self):
+        BigInt.objects.create(value ='10')
+        b = BigInt.objects.get(value = '10')
+        self.assertEqual(b.value, 10)
+
+class TypeCoercionTests(django.test.TestCase):
+    """
+    Test that database lookups can accept the wrong types and convert
+    them with no error: especially on Postgres 8.3+ which does not do
+    automatic casting at the DB level. See #10015.
+
+    """
+    def test_lookup_integer_in_charfield(self):
+        self.assertEquals(Post.objects.filter(title=9).count(), 0)
+
+    def test_lookup_integer_in_textfield(self):
+        self.assertEquals(Post.objects.filter(body=24).count(), 0)
+