How to upgrade from rails 2.0.2 to rails 3

Rails
1

Hi all,

 I have one rails 2.0.2 application. I want upgrade that application

to rails 3. How do i upgrade that application…

Can anyone explain…

2

I would create a new rails 3 app, and begin to duplicate your
controllers, models, views, DB migrations etc. slowly. Keep a
development version of the new rails 3 site and just slowly work into
it.

You will find a lot of changes, in particular the differences between
environment.rb and the new application.rb. It’s better to start off
from scratch and isolate and test one controller and model at a time
until you understand the differences.