1 files changed, 22 insertions, 2 deletions
diff --git a/askbot/models/tag.py b/askbot/models/tag.py
index dfd93879..acfc9413 100644
--- a/askbot/models/tag.py
+++ b/askbot/models/tag.py
@@ -3,9 +3,9 @@ from django.db import connection, transaction
 from django.contrib.auth.models import User
 from django.utils.translation import ugettext as _
 from askbot.models.base import DeletableContent
+from askbot.models.base import BaseQuerySetManager
 
-
-class TagManager(models.Manager):
+class TagQuerySet(models.query.QuerySet):
     UPDATE_USED_COUNTS_QUERY = """
         UPDATE tag 
         SET used_count = (
@@ -30,6 +30,18 @@ class TagManager(models.Manager):
 
         transaction.commit_unless_managed() 
 
+    def tags_match_some_wildcard(self, wildcard_tags = None):
+        """True if any one of the tags in the query set
+        matches a wildcard
+
+        :arg:`wildcard_tags` is an iterable of wildcard tag strings
+        """
+        for tag in self.all():
+            for wildcard_tag in sorted(wildcard_tags):
+                if tag.name.startswith(wildcard_tag[:-1]):
+                    return True
+        return False
+
     def get_by_wildcards(self, wildcards = None):
         """returns query set of tags that match the wildcard tags
         wildcard tag is guaranteed to end with an asterisk and has
@@ -86,6 +98,14 @@ class TagManager(models.Manager):
 
         return tags
 
+
+class TagManager(BaseQuerySetManager):
+    """chainable custom filter query set manager
+    for :class:``~askbot.models.Tag`` objects
+    """
+    def get_query_set(self):
+        return TagQuerySet(self.model)
+
 class Tag(DeletableContent):
     name            = models.CharField(max_length=255, unique=True)
     created_by      = models.ForeignKey(User, related_name='created_tags')