snippet.rb

class CreateBundles < ActiveRecord::Migration
  def self.up
    create_table :bundles do |t|
      t.string :bundle_id,  :null => false
      t.string :title,      :null => false
      t.timestamps
    end

    add_index :bundles, :bundle_id, :unique => true
  end

  def self.down
    drop_table :bundles
  end
end