PERF: speed up counting of unread notifications

discourse · May 14, 2015 · 1eeed5f · 1eeed5f
1 parent e6f73a1
commit 1eeed5f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/db/migrate/20150514023016_add_unread_notifications_index.rb b/db/migrate/20150514023016_add_unread_notifications_index.rb
@@ -0,0 +1,5 @@
+class AddUnreadNotificationsIndex < ActiveRecord::Migration
+  def change
+    add_index :notifications, [:user_id, :notification_type], where: 'not read', name: 'idx_notifications_speedup_unread_count'
+  end
+end