Sequel.migration do up { DB.add_column :tips, :currency, :text DB.add_column :tips, :message, :text DB.add_column :tips, :paypal_payer_email, :text DB.add_column :tips, :paypal_receiver_email, :text DB.add_column :tips, :paypal_txn_id, :text DB.add_column :tips, :fee, :numeric } down { DB.drop_column :tips, :currency DB.drop_column :tips, :message DB.drop_column :tips, :paypal_payer_email DB.drop_column :tips, :paypal_receiver_email DB.drop_column :tips, :paypal_txn_id DB.drop_column :tips, :fee } end