heroku_cheatsheet.md

Checklist for Heroku/Sinatra/Active Record App Deployment

Prepare Your App

Set up your environments.rb file:

• mkdir config
• touch environments.rb
• set up thusly:

configure :production, :development do
  db = URI.parse(ENV['DATABASE_URL'] || 'postgres://brittlewis@localhost/[dbname_here]')

  ActiveRecord::Base.establish_connection(
    :adapter => 'postgresql',
    :host     => db.host,
    :username => db.user,
    :password => db.password,
    :database => db.path[1..-1],
    :encoding => 'utf8'
  )
end

• Make sure to require environments.rb in your sinatra server:

require_relative 'config/environments'

• and add this after block to the server file:

after do
  ActiveRecord::Base.clear_active_connections!
end

Create a your config rackup file

• touch config.ru

require './server'
run Sinatra::Application

You need a Gemfile!

• touch Gemfile
• make it say:

source "https://rubygems.org"
ruby "2.0.0"
gem "sinatra", "~> 1.4"
gem "sinatra-contrib", "~> 1.4"
gem "activerecord", "~> 4.0"
gem "pg", "~> 0.17"

Bundle up

• bundle install
• you should see Gemfile.lock created for you

Procfile

• File in root folder of app used by heroku to establish process type. Not required.
• https://devcenter.heroku.com/articles/procfile#process-types-as-templates
• For sinatra:

web: bundle exec rackup config.ru -p $PORT

Get Ready to Heroku

• git init
• git commit -m "first commit"
• create app

heroku apps:create thenameofmyapp

or...

heroku create

Migrate your schema to Heroku:

• heroku pg:psql
• create table in database by running schema
• heroku open

DONE