Gem installed rails 2.3.8, but not generate rdoc, how to fix?

Question

I use gem install rails -v=2.3.8 to install rails, and it says rdoc and ri has been generated.

But when I gem server, I can't open the rails doc in browser, it says doc_root/rails-2.3.8/rdoc/index.html not found

I looked into /usr/local/lib/ruby/gems/1.8/doc/rails-2.3.8/rdoc, found it is empty.

How to fix it? How to generate the rdoc by gem?

Answer 1

Maybe re-generating might help: sudo gem rdoc --all