nil nil - 1 year ago 180
Ruby Question

Rails keeps telling me that it's not currently installed

I use

to manage different rubies and their gemsets. My shell is zsh with oh-my-zsh configured with basic settings. Enabled oh-my-zsh plugins are ruby, rails, osx, and git. Here's the command I used to install ruby-1.8.7 and rails-3.0.7.

rvm install 1.8.7
rvm use 1.8.7
gem install rails -v=3.0.7

and then I typed
and got:

Rails is not currently installed on this system. To get the latest version, simply type:

$ sudo gem install rails

You can then rerun your "rails" command.

I've tried more thorough installs also, Like reinstall
after switching to ruby-1.8.7, or create a completely new gemset, but with no luck.

Here's the rvm info:


uname: "Darwin yicai.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun 7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64 x86_64"
bash: "/bin/bash => GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin10.0)"
zsh: "/bin/zsh => zsh 4.3.9 (i386-apple-darwin10.0)"

version: "rvm 1.8.6 by Wayne E. Seguin ( []"

interpreter: "ruby"
version: "1.8.7"
date: "2011-06-30"
platform: "i686-darwin10.8.0"
patchlevel: "2011-06-30 patchlevel 352"
full_version: "ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-darwin10.8.0]"

gem: "/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails"
ruby: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352"

ruby: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/ruby"
irb: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/irb"
gem: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/gem"
rake: "/Users/nil/.rvm/bin/rake"

PATH: "/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails/bin:/Users/nil/.rvm/gems/ruby-1.8.7-p352@global/bin:/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin:/Users/nil/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/sbin"
GEM_HOME: "/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails"
GEM_PATH: "/Users/nil/.rvm/gems/ruby-1.8.7-p352@rails:/Users/nil/.rvm/gems/ruby-1.8.7-p352@global"
MY_RUBY_HOME: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352"
IRBRC: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/.irbrc"
gemset: "rails"

and the gem version is 1.8.10, the latest.

Answer Source

I had this problem today. Not completely related to your question, but since this page is what comes up in Google when I search for "Rails is not currently installed on this system", I thought I would add my answer:

What happened is that I was using ruby 1.9.2 with rails for a while, but then I needed to use ruby 1.8.7 to run some other script that I found.

Afterwards, I wanted to change by system back to using 1.9.2, and that's where the problem started:

$ rvm list

=> ruby-1.8.7-p352 [ x86_64 ]
ruby-1.9.2-p290 [ x86_64 ]

$ rvm use 1.9.2

I thought that would do the trick. But no, that gives me the "Rails is not currently installed on this system" message.

What I had forgotten is that I had configured rails using an rvm gemset. So I needed to specify the correct gemset when I was selecting which ruby version to make active.

$ rvm gemset list_all

gemsets for ruby-1.8.7-p352 (found in /Users/asgeo1/.rvm/gems/ruby-1.8.7-p352)

gemsets for ruby-1.9.2-p290 (found in /Users/asgeo1/.rvm/gems/ruby-1.9.2-p290)

$ rvm use ruby-1.9.2-p290@rails31

That did the trick.

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