Optimized some post count calls.

boards/models.py

@@ -60,7 +60,7 b' class PostManager(models.Manager):'
             threads = self.filter(parent=NO_PARENT, tags=tag)
         else:
             threads = self.filter(parent=NO_PARENT)
-        threads = list(threads.order_by('-last_edit_time'))
+        threads = threads.order_by('-last_edit_time')
 
         if page != self.ALL_PAGES:
             thread_count = len(threads)
@@ -87,7 +87,7 b' class PostManager(models.Manager):'
     def exists(self, post_id):
         posts = self.filter(id=post_id)
 
-        return len(posts) > 0
+        return posts.count() > 0
 
     def get_thread_page_count(self, tag=None):
         if tag:
@@ -95,7 +95,8 b' class PostManager(models.Manager):'
         else:
             threads = self.filter(parent=NO_PARENT)
 
-        return int(math.ceil(len(threads) / float(settings.THREADS_PER_PAGE)))
+        return int(math.ceil(threads.count() / float(
+            settings.THREADS_PER_PAGE)))
 
     def _delete_old_threads(self):
         """
@@ -103,8 +104,6 b' class PostManager(models.Manager):'
         delete the old ones.
         """
 
-        # TODO Try to find a better way to get the active thread count.
-
         # TODO Move old threads to the archive instead of deleting them.
         # Maybe make some 'old' field in the model to indicate the thread
         # must not be shown and be able for replying.
@@ -114,7 +113,7 b' class PostManager(models.Manager):'
 
         if thread_count > settings.MAX_THREAD_COUNT:
             num_threads_to_delete = thread_count - settings.MAX_THREAD_COUNT
-            old_threads = threads[-num_threads_to_delete:]
+            old_threads = threads[thread_count - num_threads_to_delete:]
 
             for thread in old_threads:
                 self.delete_post(thread)
@@ -152,6 +151,8 b' class Tag(models.Model):'
     section. There can be multiple tags for each message
     """
 
+    OPENING_POST_WEIGHT = 5
+
     objects = TagManager()
 
     name = models.CharField(max_length=100)
@@ -166,13 +167,14 b' class Tag(models.Model):'
 
     def get_post_count(self):
         posts_with_tag = Post.objects.get_threads(tag=self)
-        return len(posts_with_tag)
+        return posts_with_tag.count()
 
     def get_popularity(self):
         posts_with_tag = Post.objects.get_threads(tag=self)
         reply_count = 0
         for post in posts_with_tag:
             reply_count += post.get_reply_count()
+            reply_count += self.OPENING_POST_WEIGHT
 
         return reply_count
 
@@ -217,7 +219,7 b' class Post(models.Model):'
         return Post.objects.filter(parent=self.id)
 
     def get_reply_count(self):
-        return len(self._get_replies())
+        return self._get_replies().count()
 
     def get_images_count(self):
         images_count = 1 if self.image else 0