Wize Upgrader Gem

This gem is for upgrading basic Rails 3.2 apps to Rails 4.

We have to upgrade a bunch of apps from Rails 3.2 to Rails 4. We built this gem to help. NB: most of our apps are simple, but this should handle 95% of the cases out there.

Getting started

$ gem install wize_upgrader

Run it from outside of your rails app.

$ wize_upgrader <rails_app_dir>

What it does

• makes a copy of old app to <rails_app_dir>_old
• generates a new rails app with rails new <rails_app_dir> -T
• copies over
  • .git
  • app
  • db
  • script => bin
  • spec
  • vendor
  • config/routes.rb
  • config/initializers (except wrap_parameters.rb)
  • config/locales
• removes references to attr_accessible in models
• uses attr_accessible list to create *_params method in related controllers

Assumptions / TODO

• attr_accessible method calls are all one liners
• does not maintain gem groups in Gemfile

Requirements

• fileutils
• active_support/inflector