require Rails.root.join('db', 'migrate', '20110319005509_add_processed_to_post') class UnprocessedImageUploader < ActiveRecord::Migration def self.up AddProcessedToPost.down rename_column :posts, :image, :processed_image add_column :posts, :unprocessed_image, :string end def self.down remove_column :posts, :unprocessed_image rename_column :posts, :processed_image, :image AddProcessedToPost.up end end