Rails 3.1 execjs and Could not find a JavaScript runtime

<code>gem 'execjs'
gem 'therubyracer'


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


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原文地址：https://www.cnblogs.com/lexus/p/2203171.html