# encoding:utf-8 class CreateGroupMessageRelateds < ActiveRecord::Migration def up create_table :depart_records_message_groups do |t| t.integer :message_group_id t.integer :depart_record_id end add_index :depart_records_message_groups, [:message_group_id, :depart_record_id], :name => "idx_message_group_id" end def down drop_table :depart_records_message_groups end end