Paper_trail gem: uninitialized constant VersionsController::Version

paper-trail-gem, ruby-on-rails

Solution

The latest versions of Papertrail actually namespace the Version class as PaperTrail::Version. This will fix the problem immediately.

Here is an example:

def revert
  @version = PaperTrail::Version.find(params[:id])
  if @version.reify
    @version.reify.save!
  else
    @version.item.destroy
  end
end

Problem

I had this working fine following the Railscast episode by Ryan Bates and then some weeks later I went back to check on it and it was borked. Now I'm getting this error whenever I hit the undo button: uninitialized constant VersionsController::Version I have it set up exactly as in the screencast, but I have no clue what might have broken it. Problem is on line 3 apparently: ``` class VersionsController < ApplicationController def revert @version = Version.find(params[:id]) @version.reify.save! redirect_to :back, :notice => "Undid #{@version.event}" end end ``` Any suggestions? http://railscasts.com/episodes/255-undo-with-paper-trail

Original source