Updating rails to 2 2

Each instance had its own set of gems and its own versions of those gems. One of our engineers picked the latest version of each gem initialized by in production to create our first Gemfile.He installed Bundler using their Rails 2.3 guide and added any missing gems when trying to start the app.I built this guide based on my real-world experiences over years of gem migrations, including a recent upgrade to Rails 4.1, RSpec 3.0, and Twitter Bootstrap 3.Here’s my favorite reasons for keeping gems relatively current: That being said, recent versions can have new bugs, so it’s best to avoid versions that are unreleased or that haven’t aged at least a few weeks.We added the required pieces throughout the past year, and, looking back, breaking the upgrade into three major steps was easier to manage than trying to cram it into a single deploy.

Rails 5.0 has new application classes that you should have and inherit from, the same way as Application Controller or Application Helper. It addresses many issues and dealing with performance, security and new features like Action Cable, Rails API, Turbolinks 3 and etc.Check this out for more details: Rails 5.0 requires Ruby 2.2.2 or greater versions Upgrade your application to Rails 4.2 Decent code coverage to make upgrade easier Let’s do the steps for an upgrade, now: Rails 5.0 requires ruby greater than 2.2.2.By Ross Allen One of the major nerd goals for Airbnb in 2011 was upgrading to Rails 3.Our production instances made the final switch in the week leading up to Thanksgiving, but it didn’t happen all at once.What are the best-practices for upgrading gems to newer versions?

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