undefined method `caches_action' for ApplicationController:Class

Question

I'm trying to upgrade to rails 4 beta 1, but I've a bit of a problem.

This is, in short, how my application controller looks like.

class ApplicationController < ApplicationController
  caches_action :method
end

caches_action is moved out to it's own gem in Rails 4, so including the gem should fix the problem.

gem "actionpack-action_caching", github: "rails/actionpack-action_caching"

But when I run my requests specs or visit the application in a browser I get this error.

app/controllers/application_controller.rb:3:in `<class:ApplicationController>': undefined method `caches_action' for ApplicationController:Class (NoMethodError)

Why is that?

• Rails 4.0.0.beta1
• Ruby 2.0.0
• Rspec 2.13.1

Answer 1

As the caching is not a part of core anymore, you need to explicitly require it in top of every file you use it in:

require 'actionpack/action_caching'

Answer 2

The problem is in Rails 4, they have extracted cache part into separate gems

if you are getting error for action caching then you need to add below gem

gem 'actionpack-action_caching'

for page caching have to add

gem 'actionpack-page_caching'

I also played around then I figure out that, have not added gem to do the same.

hope that will works. Thank you.