Rails4.1.6启动报错Could not find a JavaScript runtime

我的电脑系统及Rails版本:CentOS 7,Rails4.1.6,Ruby2.0.0

1启动服务器后报错

#rails server

刚建的新项目,启动服务报错:

/home/oss/.gem/ruby/gems/execjs-2.2.1/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)

from /home/oss/.gem/ruby/gems/execjs-2.2.1/lib/execjs.rb:5:in `<module:ExecJS>'

from /home/oss/.gem/ruby/gems/execjs-2.2.1/lib/execjs.rb:4:in `<top (required)等等

解决方法:

方法一:

1实际报错信息都已经给出来了解决链接https://github.com/sstephenson/execjs,在上边的报错信息中

看过后直接安装这个就行了therubyracer

参考该插件的说明:https://github.com/sstephenson/execjs#readme

安装命令

#gem install therubyracer

过程的成功的信息如下:

[oss@localhost t9]$ gem install therubyracer

Fetching: ref-1.0.5.gem (100%)

Successfully installed ref-1.0.5

Fetching: libv8-3.16.14.7-x86_64-linux.gem (100%)

Successfully installed libv8-3.16.14.7-x86_64-linux

Fetching: therubyracer-0.12.1.gem (100%)

Building native extensions.  This could take a while...

Successfully installed therubyracer-0.12.1

Parsing documentation for ref-1.0.5

Installing ri documentation for ref-1.0.5

Parsing documentation for libv8-3.16.14.7-x86_64-linux

Installing ri documentation for libv8-3.16.14.7-x86_64-linux

Parsing documentation for therubyracer-0.12.1

Installing ri documentation for therubyracer-0.12.1

Done installing documentation for ref, libv8, therubyracer after 1 seconds

3 gems installed

说明没有问题,安张了三个gem都成功了

方法二:

(1)修改你新建的项目的根目录下的Gemfile

# vi Gemfile

找到下面这行,把注释去掉,

# gem 'therubyracer',  platforms: :ruby

修改为

gem 'therubyracer',  platforms: :ruby

保存退出 #wq

(2)用bundle安装即可

#bundle install

参考rails4 Guides:

方法三:

(3)把execjs和therubyracer都不要了,卸载掉然后安装nodejs即可

官网

下载后安装就行了

#tar  -xzvf  node-v0.10.31.tar.gz

#cd  node-v0.10.31

#  ./configure

#make

#make install

Rails 的详细介绍请点这里
Rails 的下载地址请点这里

Ubuntu下Apache服务器安装以及使用Passenger插件部署Rails应用 

Ubuntu下搭建Ruby On Rails 

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