Rails3.2で`autodetect’: Could not find a JavaScript runtime. がでてrails severが起動しない

Nov 3, 2012

AD:

環境

Rubyは、rbenvで入れました。

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS"
$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
$ rails -v
Rails 3.2.8

$ cat /etc/lsb-release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=12.04

DISTRIB_CODENAME=precise

DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS"

$ ruby -v

ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]

$ rails -v

Rails 3.2.8

問題

新しくRailsからプロジェクトを作って、それをなにもGemfile変更なしにrails serverを起動したら下記のエラーが出て

$ rails new hoge
$ cd hoge
$ rails sever
/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

$ rails new hoge

$ cd hoge

$ rails sever

/gems/1.9.1/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

対策

調べたところ、CoffeeScriptが入っているのでJavsacriptエンジンが必要らしいので、Gemfileに書きを追加して、解決

$ vi Gemfile
gem 'execjs'
gem 'therubyracer'
$ bundle install

$ vi Gemfile

gem 'execjs'

gem 'therubyracer'

$ bundle install

AD:

Cloud Nine

2 Comments, Comment or Ping

ジョアン

なおりました！ありがとうございます

Jun 4th, 2013
mizoshiri

よかったですねー I am glad to hear that 🙂

Jun 5th, 2013

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