Chris@0: class CreateGroupsUsers < ActiveRecord::Migration
Chris@0:   def self.up
Chris@0:     create_table :groups_users, :id => false do |t|
Chris@0:       t.column :group_id, :integer, :null => false
Chris@0:       t.column :user_id, :integer, :null => false
Chris@0:     end
Chris@0:     add_index :groups_users, [:group_id, :user_id], :unique => true, :name => :groups_users_ids
Chris@0:   end
Chris@0: 
Chris@0:   def self.down
Chris@0:     drop_table :groups_users
Chris@0:   end
Chris@0: end