Fixed #12818. SQLite now properly quotes strings for date extraction and truncation. Thanks, SmilyChris.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12573 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/backends/tests.py

@@ -1,9 +1,12 @@
 # -*- coding: utf-8 -*-
 # Unit and doctests for specific database backends.
+import datetime
+import models
 import unittest
 from django.db import backend, connection, DEFAULT_DB_ALIAS
 from django.db.backends.signals import connection_created
 from django.conf import settings
+from django.test import TestCase
 
 class Callproc(unittest.TestCase):
 
@@ -34,6 +37,35 @@ class LongString(unittest.TestCase):
             c.execute('DROP TABLE ltext')
             self.assertEquals(long_str, row[0].read())
 
+class DateQuotingTest(TestCase):
+
+    def test_django_date_trunc(self):
+        """
+        Test the custom ``django_date_trunc method``, in particular against
+        fields which clash with strings passed to it (e.g. 'year') - see
+        #12818__.
+
+        __: http://code.djangoproject.com/ticket/12818
+
+        """
+        updated = datetime.datetime(2010, 2, 20)
+        models.SchoolClass.objects.create(year=2009, last_updated=updated)
+        years = models.SchoolClass.objects.dates('last_updated', 'year')
+        self.assertEqual(list(years), [datetime.datetime(2010, 1, 1, 0, 0)])
+
+    def test_django_extract(self):
+        """
+        Test the custom ``django_extract method``, in particular against fields
+        which clash with strings passed to it (e.g. 'day') - see #12818__.
+
+        __: http://code.djangoproject.com/ticket/12818
+
+        """
+        updated = datetime.datetime(2010, 2, 20)
+        models.SchoolClass.objects.create(year=2009, last_updated=updated)
+        classes = models.SchoolClass.objects.filter(last_updated__day=20)
+        self.assertEqual(len(classes), 1)
+
 def connection_created_test(sender, **kwargs):
     print 'connection_created signal'