From aebb15337b2ecfa8611b7dd7616eb3528dc75e3c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9gis=20Hanol?= <regis@hanol.fr>
Date: Sat, 14 May 2016 18:34:03 +0200
Subject: [PATCH] remove invalid topic_users rows

---
 .../20160514100852_remove_invalid_topic_user.rb    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 db/migrate/20160514100852_remove_invalid_topic_user.rb

diff --git a/db/migrate/20160514100852_remove_invalid_topic_user.rb b/db/migrate/20160514100852_remove_invalid_topic_user.rb
new file mode 100644
index 00000000000..9f9f09f5858
--- /dev/null
+++ b/db/migrate/20160514100852_remove_invalid_topic_user.rb
@@ -0,0 +1,14 @@
+class RemoveInvalidTopicUser < ActiveRecord::Migration
+  def up
+    execute <<-SQL
+      DELETE FROM topic_users
+       USING topic_users tu
+   LEFT JOIN users u ON u.id = tu.user_id
+       WHERE u.id IS NULL
+         AND topic_users.id = tu.id
+    SQL
+  end
+
+  def down
+  end
+end