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:Module
but not on every page, just some pages are involved. I googled it already but I didnt find anything! Im running ruby 1.9.2 by the way...
Also my asset pipeline doesnt seem to work. Its not loading the application.cssand application.js file even its in the assets subfolders. Im getting a routing error each time I try to fetch any of the files.
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
I solved this problem adding the therubyracer gem to the Gemfile and runned bundle install. Thats it...
来源：https://stackoverflow.com/questions/8138368/after-upgrading-to-rails-3-1-1-undefined-method-javascript-expansions-error