class CreateGroupOrderInvoices < ActiveRecord::Migration[5.2] def change create_table :group_order_invoices do |t| t.integer :group_order_id t.bigint :invoice_number, unique: true, limit: 8 t.date :invoice_date t.string :payment_method t.timestamps end add_index :group_order_invoices, :group_order_id, unique: true end end