Last Updated: September 09, 2019
· smok_

Upgrade Rails 4.2 to Rails 5.0.0.beta2

Hey guys!,

My experience with Rails 5

Install Rails 5

rvm install 2.2.2 (Rails 5 run on ruby 2.2.2)
rvm use 2.2.2

gem install rails -v 5.0.0.beta2

you can try a new application as always

rails new <application>

Exsiting application

I safe two files, routes.rb and assets.rb.

Then copy gem fail generated for rails 5

source ''

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '>= 5.0.0.beta2', '< 5.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more:
gem 'turbolinks'
# Build JSON APIs with ease. Read more:
gem 'jbuilder', '~> 2.0'
# Use Puma as the app server
gem 'puma'

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug'

group :development do
  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 3.0'
  # Spring speeds up development by keeping your application running in the background. Read more:
  gem 'spring'

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

add you last configuration of Gemfile in bottom file, and you do:

bundle install

Then paste in route.rb you old route and assets.rb.

rails s
=> Booting Puma
=> Rails 5.0.0.beta1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Puma 2.15.3 starting...
* Min threads: 0, max threads: 16
* Environment: development
* Listening on tcp://localhost:3000