diff options
Diffstat (limited to 'db/migrate/20170418103908_delete_orphan_notification_settings.rb')
-rw-r--r-- | db/migrate/20170418103908_delete_orphan_notification_settings.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/db/migrate/20170418103908_delete_orphan_notification_settings.rb b/db/migrate/20170418103908_delete_orphan_notification_settings.rb new file mode 100644 index 00000000000..e4b9cf65936 --- /dev/null +++ b/db/migrate/20170418103908_delete_orphan_notification_settings.rb @@ -0,0 +1,24 @@ +class DeleteOrphanNotificationSettings < ActiveRecord::Migration + DOWNTIME = false + + def up + execute("DELETE FROM notification_settings WHERE EXISTS (SELECT true FROM (#{orphan_notification_settings}) AS ns WHERE ns.id = notification_settings.id)") + end + + def down + # This is a no-op method to make the migration reversible. + # If someone is trying to rollback for other reasons, we should not throw an Exception. + # raise ActiveRecord::IrreversibleMigration + end + + def orphan_notification_settings + <<-SQL + SELECT notification_settings.id + FROM notification_settings + LEFT OUTER JOIN namespaces + ON namespaces.id = notification_settings.source_id + WHERE notification_settings.source_type = 'Namespace' + AND namespaces.id IS NULL + SQL + end +end |