doc/technical/archived_migrations/20180412080611_update_leaderboards.rb
class UpdateLeaderboards < ActiveRecord::Migration[5.1]
def change
rename_table :lboards, :base_leaderboards
drop_view :leaderboards
drop_view :current_leaderboards
drop_view :ongoing_leaderboards
drop_view :current_ongoing_leaderboards
execute "DROP MATERIALIZED VIEW previous_leaderboards;"
execute "DROP MATERIALIZED VIEW previous_ongoing_leaderboards;"
execute "create view leaderboards as select * from challenges where id < 1;"
execute "create view ongoing_leaderboards as select * from challenges where id < 1;"
execute "create view previous_leaderboards as select * from challenges where id < 1;"
execute "create view previous_ongoing_leaderboards as select * from challenges where id < 1;"
update_view :leaderboards, version: 21, revert_to_version: 20
update_view :ongoing_leaderboards, version: 5, revert_to_version: 4
update_view :previous_leaderboards, version: 3, revert_to_version: 2
update_view :previous_ongoing_leaderboards, version: 2, revert_to_version: 1
end
end