After upgrading to Rails 3.1.1: “undefined method `javascript_expansions'” error

Question

Ive upgraded rails from 3.0.10 to 3.1.1 and now Im getting the following Error:

undefined method \'javascript_expansions\' for ActionView::Helpers::AssetTagHelper:

Answer 1

I got the exact same error, after removing tinymce and running bundle install everything was running smooth, so heat up the coffee machine and try to remove suspect JavaScripts.

Maybe it was just a lucky shoot he he

Answer 2

I solved this problem adding the therubyracer gem to the Gemfile and runned bundle install. Thats it...