I installed Paper Trail for use in a Rails 3 application today, which seems to work fine, except for the migration generator not working to. Thankfully it’s nice and easy to fix:

rails g migration create_versions

And then replace the contents of that file with the template from GitHub.

Once that’s done, migrate up, and you’re good to go.

Apparently there’s a fork with a Rails 3 generator on GitHub already, so this should stop being neccesary once the author gets back from holiday.