title: upgrading my project from ruby 1.8.7 to 2 and Rails 3.2.3 to 4
body: <p>I currently have a Rails project made in ruby 1.8.7 and Rails 3.2.3. Some previous developers started it in 1.8.7 and 3.2.3 about a year and a half ago. It was made completely for desktop - mobile looks terrible. I'd day there's about 60,000 - 90,000 lines of code in the project (is there a way to count this? I use Sublime)</p>
  
  <p>It turns out, the application is much more useful on mobile. I had thought the common sense thing to do would be to create mobile views/ tweak what we have/ add some new features...so it looks good on mobile phones.  </p>
  
  <p>But my new developer who I have been working with has thrown his hands up and says now he insists I upgrade to Ruby 2 and Rails 4. Which means most of the project is going to have to be written again. </p>
  
  <p>Has anyone experience of upgrading from 1.8.7 to 2 and 3.2.3 to 4? It is a huge job? Can I not just keep what I have or would that cause headaches down the road? Just interested in your ideas, thanks....</p>