Cloud9 Rails5 Heroku update

gistfile1.txt

Cloud9.io has a Rails template project, but it is Rails 4

Check that it is still Rails 4:
$ rails -v

Rails 5 needs ruby 2.2.2 minimum, but I belive that Cloud9 has 2.3.0p0....just check:
$ ruby -v

Update the rails installation to 5:
$ gem install rails

Update Gemfile line near the top:
$ gem 'rails', '>= 5.0.1'

Update rails to v5:
$ bundle update rails

It should now be v5.x, let's check:
$ rails -v

Upgrade the project:
$ rails app:update

Create an ApplicationRecord:
# app/models/application_record.rb
class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

Cloud 9 can't talk to Heroku over https:
$ wget -qO- https://cli-assets.heroku.com/install-ubuntu.sh | sh