What are the best strategies/practices for Rails upgradation from 2.3.11 to 4.0.0?

rubyonrails-talk
1

I would like to upgrade one of my application from rails -2.3.11 to 4.0.0. Before going to do anything, I just need plan for it and my application not that much of big size but got some 6/7 plugins and 5/6 gems.

Existed    : Ruby 1.8.7 + Rails 2.3.11
  Expected : Ruby 2.0.0 + Rails 4.0.0

   For this, I have plan as in two ways like below,
   1).Multi-step process : First need to upgrade app from rails 2.* to 3.* and then
      do upgrade from rails 3.* to 4.0.0
   2).Create new application from rails - 4.0.0 and rebuild old application all features as we have already css, layouts...

   I hope both strategies will take same time.

 Any how, I need some inputs from you all. So please share your thoughts/comments.

     Thanks in advance.
2

Step zero is to make sure that you have full test coverage so that you can be confident the app continues to work correctly.

Colin

3

Step zero point one is to review your 6/7 plugins and 5/6 gems and ensure they’ve been moved forward to your final target.