RVM is not working in ZSH

I'd like to try out the ZSH shell on my Mac, but I also do a lot of Ruby and Rails development, so I use RVM quite a bit too. The problem is that I can't seem to get RVM to work in ZSH, and it's working fine in the default Bash shell:

> zsh
> rvm 1.9.2
> ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
> which ruby
/usr/bin/ruby

I can definitely confirm that RVM is installed, as well as ruby 1.9.2 under RVM; I use it all the time in Bash. Running an rvm list in ZSH shows this, interestingly:

rvm rubies

   ruby-1.8.7-p302 [ x86_64 ]
=> ruby-1.9.2-p0 [ x86_64 ]

This is happening on both my iMac and MacBook Pro. I am using OS X 10.6.6 on both, ZSH 4.3.9 on the iMac (4.3.10 on the laptop). Nothing fancy like oh-my-zsh just yet.

I tried looking at the documentation on RVM's website, but nothing helped me there.

Do you have this line in your ~/.zshrc?

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" 

Note March 2014:

With latest RVM, the following line:

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" 

isn't needed anymore, and it shouldn't be in your ~/.zshrc.

Documentation has been updated in RVM documentation with Zsh:

Make sure in iTerm2 Preferences: Login shell option is set (do not use Command option). This is required for RVM to work.

If you are still getting rvm is not a function errors on iTerm, try:

rvm get stable --auto-dotfiles

Note November 2014

The rvm installation instructions warn that .zshrc doesn't include $PATH when setting PATH, thus replacing PATH's contents without regard for what already exists in PATH.

To remedy this I now append PATH to have .rvm/bin and then prepend $PATH at the beginning of setting PATH on the second line:

export PATH="$PATH:$HOME/.rvm/bin" # Add RVM to PATH for scripting

export PATH=$PATH:"/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/git/bin:/usr/local/mysql/bin:/opt/local/bin"

I had the same problem, I solved using this after "ruby on rails" installation:

echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.zshrc

and

source ~/.zshrc