How can I make my Ruby on Rails 2.3.4 application "Rails 3-ready"

Posted by marcgg on Stack Overflow See other posts from Stack Overflow or by marcgg
Published on 2009-09-16T19:56:57Z Indexed on 2010/03/19 2:11 UTC
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ruby-on-rails

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deprecation

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evolution

I'm developing an application with Ruby on Rails that I want to maintain for at least a few years, so I'm concerned about the next version coming up soon.

Going from Rails 1 to Rails 2 was such a big pain that I didn't bother and froze my gems and let the application die, alone, in the dark.

On this project I don't want to do that. First because this new version looks awesome, but also because this application may turn into a real product.

How can I prepare my application so that it will be upgradable with as little changes as possible.
How time consuming do you think switching version will be?
And what about my server? Deployment?

I'm already looking at deprecation notices... what else can I do?

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