Jbuilder support

[jims3ne1]

I'm trying to use cache_digest gem with jbuilder (currently using Rails 3.x)
I can't seem to make it work like this.

cache @videos do 
  json.partial! "api/videos/video", collection: @videos, as: :video
end

It throws an error:

NoMethodError - undefined method `length' for nil:NilClass: actionpack (3.2.18) lib/action_view/helpers/cache_helper.rb:52:in`fragment_for' cache_digests (0.3.1) lib/cache_digests/fragment_helper.rb:22:in `fragment_for'

[Overload119]

Try, json.cache! @videos do