Does ri know about all ruby classes?

Question

When I pass CSV to ri I get this output

Nothing known about CSV

I thought all ruby classes are documented with ri.

Answer 1

CSV is a part of standard library and is fully documented. That issue may be linked wit rvm using. Try to prepare rvm docs generate command.

Answer 2

If RI returns "NOTHING KNOWN ABOUT..." the documentation may be missing.

RI documentation isn't included when Ruby is installed. It must be manually generated - ideally, immediately after installing EACH VERSION of Ruby (before the downloaded installation files are cleaned up).

To generate it:

$ rvm docs generate

If that doesn't work, check this RVM.io page for command options & scenarios.