Porting from Rails 2.3.x to 3.x?

Question

Does anyone have experience migrating from Rails 2.3.x to Rails 3.x?

Any mistakes you need to know or suggestions you could make?

Thank!

Answer 1

There are many online resources related to this update. In my own experience, the most common problems are:

• Incompatibility Gem . There are many gems that only work with Rails 3, and the jewels that used to work in Rails 2 could no longer work in Rails 3. Make sure you get the latest gem and that you are reading the documentation to ensure that the supported gems stones are supported.
• : , , .
• Ruby 1.8.7 Greater. Rails 3 Ruby 1.8.6. , Ruby 1.8.7. Ruby 1.9.x, , gem, , Rails 2 Rails 3.
• Bundler. , . . Bundler Rails 3.
• . / script/... Anymore: script: rails console, rails db rails generate.
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Answer 2

Rails 3 Upgrade Handbook . 120- . , .

Answer 3

rails_upgrade (https://github.com/rails/rails_upgrade), , Rails 3. .

Answer 4

( , ) : http://ryanbigg.com/2010/11/the-rails-3-upgrade. , .