No Javascript runtime on windows when running rails server

Question

I'm completely new to Ruby on Rails, and I'm having trouble setting it up on my Windows PC. I have successfully followed the instructions on http://rubyonrails.org/download. However, when I go to run the rails server command I come up with this output:

C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.2.9/lib/execjs/runtimes.rb:47:in `a
utodetect': Could not find a JavaScript runtime. See https://github.com/sstephen
son/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.2.9/lib/execjs.rb:5:in
 `<module:ExecJS>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/execjs-1.2.9/lib/execjs.rb:4:in
 `<top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-script-2.2.0/lib/coffee_
script.rb:1:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-script-2.2.0/lib/coffee_
script.rb:1:in `<top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-script-2.2.0/lib/coffee-
script.rb:1:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-script-2.2.0/lib/coffee-
script.rb:1:in `<top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-rails-3.1.1/lib/coffee-r
ails.rb:1:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/coffee-rails-3.1.1/lib/coffee-r
ails.rb:1:in `<top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:68:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:68:in `block (2 levels) in require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:66:in `each'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:66:in `block in require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:55:in `each'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runt
ime.rb:55:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler.rb:1
22:in `require'
        from C:/RoR/tickets/config/application.rb:7:in `<top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/comman
ds.rb:52:in `require'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/comman
ds.rb:52:in `block in <top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/comman
ds.rb:49:in `tap'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/comman
ds.rb:49:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

When i go to the website https://github.com/sstephenson/execjs I'm still uncertain of how to proceed. Can someone point me in the right direction (remember I'm a newbie)? Thanks!

score 2 · Answer 1 · edited Nov 04 '12 at 11:59

2

I met that problem too The solution for me is just add

C:\Windows\System32

to the PATH

and restart your computer.

edited Nov 04 '12 at 11:59

Bo Persson

90,663
31
146
203

answered Nov 04 '12 at 07:40

Yang

825
1
10
13

score 2 · Answer 2 · answered Apr 20 '13 at 21:20

2

I got it working by installing node.js from http://nodejs.org/ (INSTALL link) and added its install path (includes node.exe) to my windows user ' Path' environment variable. I also added Yang's reply path to above mentioned windows variable.

answered Apr 20 '13 at 21:20

Triq

31
6

score 0 · Answer 3 · answered Nov 08 '11 at 08:34

0

This may not be a universally popular answer, but for a new user, I would comment out the lines in the gemfile that are loading sass and coffeescript. Not that they are at all bad - but I think they add unnecessary complication for someone getting to grips with the framework. Alternatively if you are already familiar with these components, then you just need to install a javascript runtime -I use node.js

answered Nov 08 '11 at 08:34

chrispanda

3,204
1
21
23

1

Don't break the framework to get it running. Also, Sass and Coffeescript are too big improvements to simply ignore. – Marnen Laibow-Koser Nov 08 '11 at 14:51
I did what you suggested--disabled the sass and coffeescript gems--and it works! However, I'll have to figure it out once I want to incorporate JavaScript but I'm still trying to get my head around how RoR works, so this works for now. Thanks! – Abundnce10 Nov 09 '11 at 05:27

No Javascript runtime on windows when running rails server

3 Answers3

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