Rails4.1.6 startup error: cocould not find a JavaScript runtime

Rails4.1.6 startup error: cocould not find a JavaScript runtime

My computer system and Rails version: CentOS 7, Rails4.1.6, Ruby2.0.0

1. An error is reported after the server is started.

# Rails server

When you start a new project, the following error occurs:

/Home/oss /. gem/ruby/gems/execjs-2.2.1/lib/execjs/runtimes. rb: 51: in 'autodetect ': cocould 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) and so on

Solution:

Method 1:

1. The actual error message has been provided. The solution link is https://github.com/ssteenson/execjs, which is in the error message on the top.

After reading this, you can directly install this on therubyracer.

Refer to instructions for this plug-in: https://github.com/sstephenson/execjs#readme

Installation command

# Gem install therubyracer

The successful process information is as follows:

[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 cocould 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

It indicates that there is no problem. Three gems have been successfully installed.

Method 2:

(1) modify the Gemfile under the root directory of the new project.

# Vi Gemfile

Find the following line and remove the comment,

# Gem 'therubyracer', platforms: ruby

Change

Gem 'therubyracer', platforms: ruby

Save and exit # wq

(2) Use bundle for installation.

# Bundle install

Reference rails4 Guides: http://guides.ruby-china.org/getting_started.html

Method 3:

(3) uninstall execjs and therubyracer and install nodejs.

Official http://nodejs.org/

Download and install it.

# Tar-xzvf node-v0.10.31.tar.gz

# Cd node-v0.10.31

#./Configure

# Make

# Make install

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