1 class CreateGroupsUsers < ActiveRecord::Migration
3 create_table :groups_users, :id => false do |t|
4 t.column :group_id, :integer, :null => false
5 t.column :user_id, :integer, :null => false
7 add_index :groups_users, [:group_id, :user_id], :unique => true, :name => :groups_users_ids
11 drop_table :groups_users