BikeShed-1/db/migrate/20130423231937_alter_user_roles.rb

class AlterUserRoles < ActiveRecord::Migration
  def change
    rename_table :user_roles, :user_role_joins
    change_table :user_role_joins do |t|
      t.rename :role, :role_id
      t.change :role_id, :integer
    end
  end
end