vendor/rails/activerecord/test/migrations/valid/3_innocent_jointable.rb

   1 class InnocentJointable < ActiveRecord::Migration
   2   def self.up
   3     create_table("people_reminders", :id => false) do |t|
   4       t.column :reminder_id, :integer
   5       t.column :person_id, :integer
   6     end
   7   end
   8
   9   def self.down
  10     drop_table "people_reminders"
  11   end
  12 end