title: How to integrate Paypal with Ruby on Rails
body: <p>Im trying to integrate paypal with my ruby on rails application using the rest-api-sdk-ruby gem (<a href="https://github.com/paypal/rest-api-sdk-ruby" rel="noreferrer">https://github.com/paypal/rest-api-sdk-ruby</a>), but could not find enough information around or a good tutorial to back me up. 
  The description provided above, although providing the necessary code, does not show how to handle the methods around or in which files should each method go to.</p>
  
  <p>Could anyone give me a starting point here or point me to a good tutorial? </p>
  
  <p>I am using rails version 4. </p>
  
  <p>Many thanks.  </p>