class MigrateWebPushSubscriptions < ActiveRecord::Migration[5.2] disable_ddl_transaction! def up add_index :web_push_subscriptions, :user_id, algorithm: :concurrently add_index :web_push_subscriptions, :access_token_id, algorithm: :concurrently end def down remove_index :web_push_subscriptions, :user_id remove_index :web_push_subscriptions, :access_token_id end end