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