Update from 1.1.6 to 1.2.3

Does anyone know of a good walkthrough of what to look for with
updating an app from 1.1.6 to 1.2.3?

google 'rails upgrade from 1.1.6 to 1.2.3' seems pretty relevant...

I am in the same boat as Will. Google did not help me one bit. The only solution I have found is to completely rebuild the app in 1.2.3, which at this time is not an option. Hopefully there is another solution. The problem I keep having is “expected SomeController to define SomeController” when it does.

Found a solution for me. Engines was causing the issue. Unfortunately, had to removed engines after the update since the login and user engines were no longer supported (another reason to remove it.)

Hope this might help someone.

googling around, i found a few blogs, here's top 2