Notes / Rails

Other notes related to Rails:

• Rails Testing

Rails setup

• GoRails: Setup Ruby On Rails on Ubuntu 16.10 Yakkety Yak - Detailed installation instructions. Also contains setup instructions for other OSes.

Debugging techniques

• Debugging Action Callbacks (aka Filters) in Rails

Rails application servers

• A Comparison of Popular Ruby Application Servers on the Engine Yard blog (Passenger, Unicorn, Thin, Puma)
• Ruby on Rails Server Options (StackOverflow question)

Rails metrics

• Pssst… your Rails application has a secret to tell you on 37signals blog
• ActiveSupport::Notifications, statistics and using facts to improve your site
• Using Statsd and Graphite from a Rails App
• Setup Statsd and Graphite: 1 2
• Practical Guide to Statsd/Graphite Monitoting
• Docker Image for Graphite and Statsd

Rails Deployment

• capistrano-ec2tag - A Capistrano plugin to deploy to Amazon EC2 instances based on their tags
• Capistrano 3 Upgrade Guide
• Configuring Rails Environments

Rails Internals

• A Visual Trace of How Rails Responds to a Request
• The Lifecycle of a Request
• Examining The Internals Of The Rails Request/Response Cycle
• Diving in Rails - The request handling

Rails and Databases

• Rails Database Best Practices

Rails API applications

• Learn how to build a modern API on Michael Hartl’s Rails 5 tutorial

Indexing in Rails

• Always add index for foreign keys

# Bad
create_table(:tweets) do |t|
  t.string  :text
  t.integer :user_id
end

# OK
create_table(:tweets) do |t|
  t.string  :text
  t.integer :user_id
end
add_index :posts, :user_id

# Better - automatically adds user_id field and creates index
create_table(:tweets) do |t|
  t.string     :text
  t.references :user
end

• When to add indexes in a table in Rails
• Using indexes in Rails - Choosing additional indexes
• Add index when the field is used for ordering
• Using indexes in Rails - Index your associations
• Rails Guides: Association basics
• Finding and Indexing: You May Be Doing It Wrong

Authentication from scratch

• Railscasts: Authentication from scratch
• A Basic User Authentication Model in Rails 4
• User Authentication from Scratch

Rate limiting

• Prop
• sidekiq-throttler
• sidekiq-rate-limiter
• redlock-rb

Contributing to Rails

• Install Virtualbox - https://www.virtualbox.org/wiki/Downloads
• Install Vagrant - http://www.vagrantup.com/downloads
• Clone rails-dev-box - https://github.com/rails/rails-dev-box
• git clone https://github.com/rails/rails-dev-box.git

cd rails-dev-box
vagrant up

This will take a lot of time the first time. A LOT.

git clone [email protected]:nithinbekal/rails.git

The current directory will be mounted as /vagrant in the vagrant box.

vagrant ssh
cd /vagrant/rails
bundle

Get the latest changes from upstream rails:

git remote add rails git://github.com/rails/rails.git
git fetch rails
git checkout master
git rebase rails/master

git push origin master

bundle exec rake test

• takes long long time to run