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truffaut/Rails-4-Upgrade-Path.md

Last active August 29, 2015 14:25
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Rails-4-Upgrade-Path.md

It's time to start talking about upgrading to Rails 4. The sensible path seems to be 3.2 -> 4.0 -> 4.1 -> 4.2, fixing issues and deprecations along the way.

A few links for more information about what will need to change as we move to Rails 4:

We'll also need to probably do an audit of our gems, since some of them have no Rails 4 compliant version.

Features we are definitely using that are deprecated (non-exhaustive list):

  • attr_accessible, replaced by strong_parameters
  • Observers replaced by nothing explicitly, but we can use callbacks or refactor to replace these
  • occasional deprecated dynamic finders (things like find_all_by_...)
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