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Upgrading to Rails 5.0, the newest Ruby on Rails version.

How to update Rails versions and upgrade Rails applications. This article shows how to add a new version of Rails while keeping an old version.

This article will cover the most important things that will make you upgrading your app from version 5.1 to 5.2Rails 5.2 requires at least ruby 2.2.2Rails 5.2 releases with relatively recent, that means some gems may still not be fully compatible or contain deprecation warnings if you’re not using their latest version.

you can check if the gem is compatible with Rails 5.0 here!

This was a major upgrade and had only a few breaking changes.

Great deprecation notices will make the upgrade completely painless.

Rails 4.2 requires Ruby 1.9.3 or later, and Ruby 2.0 (or newer) is preferred according to the official upgrade guide.

If you're using RSpec 2, you'll need to migrate to RSpec 3, since RSpec 2 doesn't officially support Rails 4.2.

You must actively and regularly maintain your Rails applications.So for each gem you have problems with, go to their documentation and check if they have any guidance for the upgrade.Run the following for updating in a interactive mode your files in .If you successfully followed all of these steps, you should now be running Rails 4.2!Do you have any other useful tips or recommendations?

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