I was running through a tutorial and now I can't start my dev server

[Mark Boughter]

I'm new so I just can't figure out what's going on here. I was going
through a tutorial to learn the ins and outs of Rails and then it just
stopped working.

I'm running RubyMine on Windows for now. Here are the errors:
[rake --tasks] rake aborted!
Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs
for a list of available runtimes.
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs/runtimes.rb:47:in `autodetect'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs.rb:5:in `<module:ExecJS>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs.rb:4:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee_script.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee-script.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
rails-3.1.1/lib/coffee-rails.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
rails-3.1.1/lib/coffee-rails.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:68:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:68:in `block (2 levels) in require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:66:in `each'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:66:in `block in require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:55:in `each'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:55:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler.rb:122:in `require'
W:/RubymineProjects/blog/config/application.rb:7:in `<top
(required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/
custom_require.rb:36:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/
custom_require.rb:36:in `require'
W:/RubymineProjects/blog/Rakefile:5:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/rake_module.rb:25:in `load'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/rake_module.rb:25:in `load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:501:in `raw_load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:82:in `block in load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:133:in `standard_exception_handling'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:81:in `load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:65:in `block in run'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:133:in `standard_exception_handling'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:63:in `run'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/bin/
rake:33:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/bin/rake:19:in `load'
W:/RailsInstaller/Ruby1.9.2/bin/rake:19:in `<main>'
I tried "gem install execjs" and "therubyracer". No change. I tried
reinstalling Ruby, then Rails. No change. I tried adding them to my
Gemfile and bundle install but it fails at "therubyracer" What could I
have possibly done? Is it really as fragile as it seems or did I just
make a terrible mistake?

[Craig White]

On Tue, 2011-12-06 at 20:28 -0800, Mark Boughter wrote:
> I'm new so I just can't figure out what's going on here. I was going
> through a tutorial to learn the ins and outs of Rails and then it just
> stopped working.
>
> I'm running RubyMine on Windows for now. Here are the errors:
> [rake --tasks] rake aborted!
> Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs
> for a list of available runtimes.

<<<snip>>>

> I tried "gem install execjs" and "therubyracer". No change. I tried
> reinstalling Ruby, then Rails. No change. I tried adding them to my
> Gemfile and bundle install but it fails at "therubyracer" What could I
> have possibly done? Is it really as fragile as it seems or did I just
> make a terrible mistake?

----
Google is your friend

http://stackoverflow.com/questions/6282307/rails-3-1-execjs-and-could-not-find-a-javascript-runtime

Craig

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[Mark Boughter]

Yeah, I googled it and came across that link before posting.  I thought that would be obvious. 

Gemfile and bundle install but it fails at "therubyracer"

It seems that after giving up and rebooting the next day the problem was alleviated.  What's google say now?   

[Craig White]

----
sounds as if you had the server running in one terminal and you were updating in another terminal. If you install things such as gems, the server needs to be restarted, even if you are in development mode.

Craig

[Wayne Mr.]

I had the same problem I am using Rails 4.2.3 and ruby 2.1.2. I found
that therubyracer gem install install "V8" The version of V8 was not
compatible with my gcc version 4.2. I had to use an older gem (0.11.0)
to get it to bundle properly.

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