title: rails paypal checkout page not showing
body: <p>I have to integrate simple paypal into my app.
  I am using following url as tutorial.</p>
  
  <p><a href="https://launchschool.com/blog/basic-paypal-checkout-processing-in-rails" rel="nofollow">paypal tutorial link</a></p>
  
  <p>before directing to paypal page I print its url in logs, which is</p>
  
  <hr>
  
  <p><a href="https://www.sandbox.paypal.com/cgi-bin/webscr?amount=12&amp;cmd=_xclick&amp;invoice=19&amp;item_name=testing&amp;item_number=19&amp;personal=omairr.azam-facilitator%40gmail.com&amp;quantity=1&amp;return=http%3A%2F%2Four_ngrok_url%23%3CUser%3A0x0000010a4e1528%3E&amp;upload=1" rel="nofollow">https://www.sandbox.paypal.com/cgi-bin/webscr?amount=12&amp;cmd=_xclick&amp;invoice=19&amp;item_name=testing&amp;item_number=19&amp;personal=omairr.azam-facilitator%40gmail.com&amp;quantity=1&amp;return=http%3A%2F%2Four_ngrok_url%23%3CUser%3A0x0000010a4e1528%3E&amp;upload=1</a></p>
  
  <hr>
  
  <p>But when I am redirected to paypal sandbox, the url that i see in my browser is </p>
  
  <p><a href="https://www.paypal.com/myaccount/home" rel="nofollow">https://www.paypal.com/myaccount/home</a></p>
  
  <p>and I cannot see checkout form that will take credentials from buyer and show details about transaction.</p>
  
  <h2>NOTE: I am on localhost at this stage and have not deployed my app</h2>
  
  <p>Please help me in this, Thanks.</p>