doc/technical/archived_migrations/20180326112813_update_current_leaderboards_to_version_3.rb
class UpdateCurrentLeaderboardsToVersion3 < ActiveRecord::Migration[5.0]
def change
drop_view :leaderboards
update_view :current_leaderboards, version: 3, revert_to_version: 2
create_view :leaderboards
end
end