Merge branch 'issue_3359' into 'master'

Remove duplicated notification settings and add unique index

See merge request !4472

2 files changed, 16 insertions, 0 deletions

diff --git a/db/migrate/20160603180330_remove_duplicated_notification_settings.rb b/db/migrate/20160603180330_remove_duplicated_notification_settings.rb
new file mode 100644
index 00000000000..c2fcac4c53d
--- /dev/null
+++ b/db/migrate/20160603180330_remove_duplicated_notification_settings.rb
@@ -0,0 +1,7 @@
+class RemoveDuplicatedNotificationSettings < ActiveRecord::Migration
+  def up
+    execute <<-SQL
+      DELETE FROM notification_settings WHERE id NOT IN ( SELECT min_id from (SELECT MIN(id) as min_id FROM notification_settings GROUP BY user_id, source_type, source_id) as dups )
+    SQL
+  end
+end
diff --git a/db/migrate/20160603182247_add_index_to_notification_settings.rb b/db/migrate/20160603182247_add_index_to_notification_settings.rb
new file mode 100644
index 00000000000..06462042b09
--- /dev/null
+++ b/db/migrate/20160603182247_add_index_to_notification_settings.rb
@@ -0,0 +1,9 @@
+class AddIndexToNotificationSettings < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def change
+    add_concurrent_index :notification_settings, [:user_id, :source_id, :source_type], { unique: true, name: "index_notifications_on_user_id_and_source_id_and_source_type" }
+  end
+end