From be9ce4b61578e7d99e4a458c495de6ce50574634 Mon Sep 17 00:00:00 2001
From: Evgeny Fadeev <evgeny.fadeev@gmail.com>
Date: Sun, 3 Jun 2012 14:11:45 -0400
Subject: fixed bug where creating a group could introduce a duplicate tag

---
 askbot/models/question.py    |  2 ++
 askbot/models/tag.py         |  4 +++-
 askbot/tests/db_api_tests.py | 17 ++++++++++++++++-
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/askbot/models/question.py b/askbot/models/question.py
index dafe7ab0..affac74c 100644
--- a/askbot/models/question.py
+++ b/askbot/models/question.py
@@ -74,6 +74,7 @@ class ThreadManager(models.Manager):
                 by_email = False,
                 email_address = None
             ):
+        """creates new thread"""
         # TODO: Some of this code will go to Post.objects.create_new
 
         thread = super(
@@ -794,6 +795,7 @@ class Thread(models.Model):
         return False
 
     def retag(self, retagged_by=None, retagged_at=None, tagnames=None, silent=False):
+        """changes thread tags"""
         if None in (retagged_by, retagged_at, tagnames):
             raise Exception('arguments retagged_at, retagged_by and tagnames are required')
 
diff --git a/askbot/models/tag.py b/askbot/models/tag.py
index 779c0b68..03c91162 100644
--- a/askbot/models/tag.py
+++ b/askbot/models/tag.py
@@ -105,7 +105,9 @@ class GroupTagManager(TagManager):
         #replace spaces with dashes
         group_name = clean_group_name(group_name)
         try:
-            tag = self.get(name = group_name)
+            #iexact is important!!! b/c we don't want case variants
+            #of tags
+            tag = self.get(name__iexact = group_name)
         except self.model.DoesNotExist:
             tag = self.model(name = group_name, created_by = user)
             tag.save()
diff --git a/askbot/tests/db_api_tests.py b/askbot/tests/db_api_tests.py
index 1f3d3b9b..3a0c9582 100644
--- a/askbot/tests/db_api_tests.py
+++ b/askbot/tests/db_api_tests.py
@@ -15,6 +15,9 @@ from askbot.conf import settings as askbot_settings
 import datetime
 
 class DBApiTests(AskbotTestCase):
+    """tests methods on User object,
+    that were added for askbot
+    """
 
     def setUp(self):
         self.create_user()
@@ -161,7 +164,8 @@ class DBApiTests(AskbotTestCase):
         matches = models.Post.objects.get_questions().get_by_text_query("database'")
         self.assertTrue(len(matches) == 1)
 
-class UserLikeTests(AskbotTestCase):
+class UserLikeTagTests(AskbotTestCase):
+    """tests for user liking and disliking tags"""
     def setUp(self):
         self.create_user()
         self.question = self.post_question(tags = 'one two three')
@@ -387,3 +391,14 @@ class CommentTests(AskbotTestCase):
         self.other_user.upvote(comment, cancel = True)
         comment = models.Post.objects.get_comments().get(id = self.comment.id)
         self.assertEquals(comment.score, 0)
+
+class TagAndGroupTests(AskbotTestCase):
+    def setUp(self):
+        self.u1 = self.create_user('u1')
+        
+    def test_group_cannot_create_case_variant_tag(self):
+        self.post_question(user = self.u1, tags = 'one two three')
+        models.Tag.group_tags.get_or_create(user = self.u1, group_name = 'One')
+        tag_one = models.Tag.objects.filter(name__iexact = 'one')
+        self.assertEqual(tag_one.count(), 1)
+        self.assertEqual(tag_one[0].name, 'one')
-- 
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