1class AddIsPrimaryToPhotos < ActiveRecord::Migration
 2  def up
 3    add_column :photos, :is_primary, :boolean, :default => false
 4    add_index  :photos, :is_primary
 5  end
 6
 7  def down
 8    remove_index  :photos, :is_primary
 9    remove_column :photos, :is_primary
10  end
11end