From 66a0a89591d65eeeb691c62f0155e838e0470c40 Mon Sep 17 00:00:00 2001
From: Guo Xiang Tan <tgx_world@hotmail.com>
Date: Fri, 3 Mar 2017 15:14:49 +0800
Subject: [PATCH] PERF: Add index to speed up `DirectoryItem.refresh_period!`
 query.

---
 db/migrate/20170303070706_add_index_to_topic_view_items.rb | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 db/migrate/20170303070706_add_index_to_topic_view_items.rb

diff --git a/db/migrate/20170303070706_add_index_to_topic_view_items.rb b/db/migrate/20170303070706_add_index_to_topic_view_items.rb
new file mode 100644
index 00000000000..d3410816c2c
--- /dev/null
+++ b/db/migrate/20170303070706_add_index_to_topic_view_items.rb
@@ -0,0 +1,5 @@
+class AddIndexToTopicViewItems < ActiveRecord::Migration
+  def change
+    add_index :topic_views, [:user_id, :viewed_at]
+  end
+end