RVM doesn't set correct gem path

Question

On a clean OS X Snow Leopard install, I have a problem with RVM: It sets the ruby path correctly but doesn't set the gem path. When I start a rails server, it mixes versions which doesn't work.

To illustrate:

$ rvm system
$ which ruby
/usr/bin/ruby
$ which rails
/usr/bin/rails
$ rvm use 1.9.2-head
Using /Users/m/.rvm/gems/ruby-1.9.2-head
$ rvm gem list

LOCAL GEMS
[...]
rails (3.0.7)
[...]

$ which ruby
/Users/m/.rvm/rubies/ruby-1.9.2-head/bin/ruby
$ which rails
/usr/bin/rails

Any ideas what might be wrong?

Some additional info:

$ echo $GEM_PATH
/Users/m/.rvm/gems/ruby-1.9.2-p180:/Users/m/.rvm/gems/ruby-1.9.2-p180@global

$ echo $PATH
/Users/m/.rvm/gems/ruby-1.9.2-p180/bin:/Users/m/.rvm/gems/ruby-1.9.2p180@global/bin:/Users/m/.rvm/rubies/ruby-1.9.2p180/bin:/Users/m/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin

Answer 1

So after 1 1/2 days of torture, reading through at least 50 post, and installing rvm / ruby / rails at least 15 different times, I am finally able to use Rails in my RVM install. This was the last series of events that I did after installing RVM and Ruby on last and then it worked. I hope this helps others...

Removed from .gemrc (back up your file if you do this)...

• gemhome: /home/[user]/ruby/gems
• gempath: []
• --remote

THEN rvm use 1.9.3 --default

THEN gem install rails

It seems the trick for was:

1. change the .gemrc file
2. Don't create and use a gemset (rvm use 1.9.3@rails3) before installing rails.

Answer 2

Make sure you're always 'using' your ruby version (ugh rvm can be so annoying).

rvm use 1.9.3 --default

Also what does your .gemrc look like? I had to take out --user from mine.

Answer 3

make sure you do a gem install rails after setting the default Ruby version, e.g.

  rvm use 1.9.2-head
  gem install rails

and then check again 'which rails'