Error using Active_Admin/Devise with Heroku Cedar and Rails 3.2.2

[kjs3]

My app is falling over when I try to logout or login. It looks like it has to do with the session but the error logs from Heroku are pretty cryptic.

It points me to the template within the gem which I'm guessing doesn't really have the problem.

I'm just lost on where to go from here and I'm not actually sure when this started happening. I think my session cookie has remained through at least a week of deployments and this just happened when I logged out.

Here's the Heroku logs

https://gist.github.com/2491730

Here's the asset stuff from production.rb

https://gist.github.com/2491727

and I'm setting this in application.rb

config.assets.initialize_on_precompile = false

Any help is appreciated.

[kjs3]

I fixed it. It's an ActiveAdmin issue with formtastic. It's fixed in ActiveAdmin HEAD but I'll just wait for a gem update.

In the meantime I added the Formtastic version to my bundle.

gem "formtastic", "~> 2.1.1"