Erro no servidor Rails: “Não foi possível encontrar um tempo de execução JavaScript.”

Question

tentando executar o servidor rails eu recebo este erro:

/var/lib/gems/2.1.0/gems/execjs-2.6.0/lib/execjs/runtimes.rb:48:in 'autodetect': Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
    from /var/lib/gems/2.1.0/gems/execjs-2.6.0/lib/execjs.rb:5:in '<module:ExecJS>'
    from /var/lib/gems/2.1.0/gems/execjs-2.6.0/lib/execjs.rb:4:in '<top (required)>'
    from /var/lib/gems/2.1.0/gems/uglifier-2.7.2/lib/uglifier.rb:3:in 'require'
    from /var/lib/gems/2.1.0/gems/uglifier-2.7.2/lib/uglifier.rb:3:in '<top (required)>'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:76:in 'require'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:76:in 'block (2 levels) in require'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:72:in 'each'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:72:in 'block in require'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:61:in 'each'
    from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:61:in 'require'
    from /usr/lib/ruby/vendor_ruby/bundler.rb:133:in 'require'
    from /home/acne/Documents/WWW/web/config/application.rb:7:in '<top (required)>'
    from /usr/lib/ruby/vendor_ruby/rails/commands/commands_tasks.rb:79:in 'require'
    from /usr/lib/ruby/vendor_ruby/rails/commands/commands_tasks.rb:79:in 'block in server'
    from /usr/lib/ruby/vendor_ruby/rails/commands/commands_tasks.rb:76:in 'tap'
    from /usr/lib/ruby/vendor_ruby/rails/commands/commands_tasks.rb:76:in 'server'
    from /usr/lib/ruby/vendor_ruby/rails/commands/commands_tasks.rb:40:in 'run_command!'
    from /usr/lib/ruby/vendor_ruby/rails/commands.rb:17:in '<top (required)>'
    from bin/rails:4:in 'require'
    from bin/rails:4:in '<main>'

Como posso resolver isso? Obrigado pelo seu tempo!

    

Answer 1

Instale Node Js ou instalar therubyracer gem

gem install therubyracer

    

Answer 2

1. Comente a gema "therubyracer".
2. instale o nodejs.
3. execute o servidor novamente.