HELP "Could not find a JavaScript runtime " ERROR

Rails
1

Hello ALL,
I’m new to RoR, I get the following error stack whenever I issue
“rails server” or “rails generate …” command.

Thanks in advance!

ERROR STACK:

C:\Sites\demo_app>rails generate scaffold User name:string
email:string
C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.6/lib/
execjs/run
times.rb:46:in autodetect': Could not find a JavaScript runtime. See https://gi thub.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUn available) from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ execjs-1.2.6/l ib/execjs.rb:5:inmodule:ExecJS’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
execjs-1.2.6/l
ib/execjs.rb:4:in <top (required)>' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ coffee-script- 2.2.0/lib/coffee_script.rb:1:inrequire’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
coffee-script-
2.2.0/lib/coffee_script.rb:1:in <top (required)>' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ coffee-script- 2.2.0/lib/coffee-script.rb:1:inrequire’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
coffee-script-
2.2.0/lib/coffee-script.rb:1:in <top (required)>' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ coffee-rails-3 .1.1/lib/coffee-rails.rb:1:inrequire’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
coffee-rails-3
.1.1/lib/coffee-rails.rb:1:in <top (required)>' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ bundler-1.0.18 /lib/bundler/runtime.rb:68:inrequire’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
bundler-1.0.18
/lib/bundler/runtime.rb:68:in block (2 levels) in require' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ bundler-1.0.18 /lib/bundler/runtime.rb:66:ineach’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
bundler-1.0.18
/lib/bundler/runtime.rb:66:in block in require' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ bundler-1.0.18 /lib/bundler/runtime.rb:55:ineach’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
bundler-1.0.18
/lib/bundler/runtime.rb:55:in require' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ bundler-1.0.18 /lib/bundler.rb:120:inrequire’
from C:/Sites/demo_app/config/application.rb:7:in <top (required)>' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/ railties-3.1.0 /lib/rails/commands.rb:21:inrequire’
from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/
railties-3.1.0
/lib/rails/commands.rb:21:in <top (required)>' from script/rails:6:inrequire’
from script/rails:6:in `’

C:\Sites\demo_app>

2

You need to have a Javascript runtime installed. Either install node.js
directly or include therubyracer gem. This has been discussed on this
list
multiple times.

3

Am 18.09.2011 08:04 schrieb “Datawizz” [email protected]:

C:\Sites\demo_app>rails generate scaffold User name:string
email:string
C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.6/lib/
execjs/run
times.rb:46:in `autodetect’: Could not find a JavaScript runtime. See
https://gi
thub.com/sstephenson/execjs for a list of available runtimes.

You could have read this line of the stacktrace, it’s pointing you to a
page
where several JavaScript runtimes are listed.

Bye
Norbert

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