PERF: Scanning the `id` for this is signficantly slower in production

2018-06-28 11:04:40 -04:00 · 2018-06-28 11:04:40 -04:00 · 5d1d7e0e7d
parent fd7bb8e656
commit 5d1d7e0e7d
1 changed files with 1 additions and 1 deletions
--- a/app/models/user.rb
+++ b/app/models/user.rb
@ -449,7 +449,7 @@ class User < ActiveRecord::Base

  def publish_notifications_state
    # publish last notification json with the message so we can apply an update
-    notification = notifications.visible.order('notifications.id desc').first
+    notification = notifications.visible.order('notifications.created_at desc').first
    json = NotificationSerializer.new(notification).as_json if notification

    sql = (<<~SQL).freeze