X-Git-Url: https://git.openstreetmap.org/osqa.git/blobdiff_plain/d8b33aea55fb1b9450ad310894516d3315a64722..df656ce4c8ae86e0be20cc6e497cbab1ae8ffb3b:/forum/models/tag.py

diff --git a/forum/models/tag.py b/forum/models/tag.py
index dd628c8..73b1e30 100644
--- a/forum/models/tag.py
+++ b/forum/models/tag.py
@@ -1,11 +1,14 @@
 import datetime
 from base import *
 
+from django.conf import settings as django_settings
+from django.core.cache.backends.base import BaseCache
 from django.utils.translation import ugettext as _
+from django.utils.encoding import smart_unicode, force_unicode
 
 from forum import modules
 
-class ActiveTagManager(models.Manager):
+class ActiveTagManager(CachedManager):
     use_for_related_fields = True
 
     def get_query_set(self):
@@ -26,7 +29,7 @@ class Tag(BaseModel):
         app_label = 'forum'
 
     def __unicode__(self):
-        return u'%s' % self.name
+        return force_unicode(self.name)
 
     def add_to_usage_count(self, value):
         if self.used_count + value < 0:
@@ -34,6 +37,29 @@ class Tag(BaseModel):
         else:
             self.used_count = models.F('used_count') + value
 
+    def cache_key(self):
+        return self._generate_cache_key(Tag.safe_cache_name(self.name))
+
+    @classmethod
+    def safe_cache_name(cls, name):
+        return "".join([str(ord(c)) for c in name])
+
+    @classmethod
+    def infer_cache_key(cls, querydict):
+        if 'name' in querydict:
+            cache_key = cls._generate_cache_key(cls.safe_cache_name(querydict['name']))
+
+            if len(cache_key) > django_settings.CACHE_MAX_KEY_LENGTH:
+                cache_key = cache_key[:django_settings.CACHE_MAX_KEY_LENGTH]
+
+            return cache_key
+
+        return None
+
+    @classmethod
+    def value_to_list_on_cache_query(cls):
+        return 'name'
+
     @models.permalink
     def get_absolute_url(self):
         return ('tag_questions', (), {'tag': self.name})