How to upgrade Rails 4.2.x to Rails 5

Good news!

Rails 5.0.0.beta4 was released only a few days ago and they’re now down to just 4 open issues before we have a stable release candidate(RC1). Meaning, Rails 5 is around the corner, yay!

For most of the past two years we’ve been working on a few Rails 4.2.x apps on production, with unicorn*, but now it is just about time to consider an upgrade.

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