title: Unable to bundle install 'open-uri'
body: <p>I am very new to Rails. I am making a web application in which I am using nokogiri to search different websites to extract text from them. And so in the Gemfile, I have written require 'nokogiri' and 'open-uri', but when I bundle install I get this error :</p>
  
  <pre><code>Could not find gem 'open-uri (&gt;= 0) ruby' in the gems available on this machine
  </code></pre>
  
  <p>But when I do require 'open-uri' in my console, it displays yes. 
  So why can't I bundle install, or is there any alternative to it ?</p>