get_latest_objects_by_category templatetag

gistfile1.diff

diff --git a/categories/templatetags/category_tags.py b/categories/templatetags/category_tags.py
index 226a3ad..cddc8b9 100644
--- a/categories/templatetags/category_tags.py
+++ b/categories/templatetags/category_tags.py
@@ -1,4 +1,6 @@
 from django import template
+from django.core.cache import cache
+from django.db import models
 from django.template import Library, Node, TemplateSyntaxError, \
     Variable, resolve_variable, VariableDoesNotExist, Context
 from categories.base import CategoryBase
@@ -221,7 +223,7 @@ def resolve(var, context):
 
 def get_latest_objects_by_category(category, app_label, model_name, set_name, 
                                     date_field='pub_date', num=15):
-    m = get_model(app_label, model_name)
+    m = models.get_model(app_label, model_name)
     if not isinstance(category, CategoryBase):
         category = Category.objects.get(slug=str(category))
     children = category.children.all()
@@ -248,7 +250,7 @@ class LatestObjectsNode(Node):
                      date_field, num):
         """Get the cache key"""
         key = 'latest_objects.%s' % '.'.join([category, app_label, model_name, 
-                set_name, date_field, num])
+                set_name, date_field, str(num)])
     
     def render(self, context):
         """Render this sucker"""
@@ -263,14 +265,19 @@ class LatestObjectsNode(Node):
                          date_field, num)
         result = cache.get(cache_key)
         if not result:
-            result = get_latest_objects_by_category(category, app_label, model_name, 
+            try:
+                result = get_latest_objects_by_category(category, app_label, model_name, 
                             set_name, date_field, num)
         
-            cache.set(key, result, 300)
+                cache.set(cache_key, result, 300)
+            except Exception, e:
+                result = None
+            
         context[self.var_name] = result
         
         return ''
 
+@register.tag("get_latest_objects_by_category")
 def do_get_latest_objects_by_category(parser, token):
     """
     Get the latest objects by category