start the new topics route and view

app/models.py

@@ -111,24 +111,16 @@ class Topics(Model):
         q = """
             SELECT
                 topics.id, topics.name, topics.slug, topics.description, topics.is_locked,
-                users.username AS latest_thread_username,
-                users.display_name AS latest_thread_display_name,
-                threads.title AS latest_thread_title,
-                threads.slug AS latest_thread_slug,
-                threads.created_at AS latest_thread_created_at
+                COUNT(DISTINCT threads.id) as threads_count,
+                COUNT(posts.id) AS posts_count,
+                MAX(posts.created_at) as latest_post_timestamp
             FROM
                 topics
-            LEFT JOIN (
-                SELECT
-                *,
-                row_number() OVER (PARTITION BY threads.topic_id ORDER BY threads.created_at DESC) as rn
-            FROM
-                threads
-            ) threads ON threads.topic_id = topics.id AND threads.rn = 1
             LEFT JOIN
-                users on users.id = threads.user_id
-            ORDER BY
-                topics.sort_order ASC"""
+                threads ON threads.topic_id = topics.id
+            LEFT JOIN
+                posts ON posts.thread_id = threads.id
+            GROUP BY topics.id ORDER BY topics.sort_order ASC"""
         return db.query(q)
 
     def get_threads(self, per_page, page, sort_by = 'activity'):