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Devise (revised)
Devise is one of the most popular authentication plugins for Rails. Here I show how to set it up with a User model and configure the modules, views, routes, and more.
(8 minutes)
OAuth with Doorkeeper
Doorkeeper makes it easy to create an OAuth 2 provider. This episode also shows how to setup OmniAuth as an OAuth client and use the oauth2 gem to communicate with an API.
(19 minutes)
Testing JavaScript with Jasmine (revised)
The jasminerice gem makes it easy to test your JavaScript with Jasmine in a Rails application. Here I also cover jasmine-jquery and guard-jasmine.
(11 minutes)
Sidekiq
Sidekiq allows you to move jobs into the background for asynchronous processing. It uses threads instead of forks so it is much more efficient with memory compared to Resque.
(10 minutes)
Strong Parameters
The strong_parameters gem is an improvement over attr_accessible to securely handle mass assignment even when you have complex authorization logic. The functionality will likely be added to Rails 4 so it is a good idea to learn how it works.
(12 minutes)
Private Pub
Private Pub makes it easier than ever to publish and subscribe to real-time events in a Rails app. You can use publish_to with a block of JavaScript or supply a hash for use with JSON.
(7 minutes)
More on Twitter Bootstrap
This episode continues on the Twitter Bootstrap project showing how to display flash messages, add form validations with SimpleForm, customize layout with variables, and switch to using Sass.
(12 minutes)
Hstore
With hstore you can add schema-less data to PostgreSQL. This allows you to store model attributes without creating separate database columns. Watch how to do this using the activerecord-postgres-hstore gem.
(10 minutes)
make_resourceful
The make_resourceful plugin is a great way to DRY up the 7 RESTful actions common in most controllers. Learn how to use it in this episode.
(6 minutes)
Bullet
Bullet will notify you of database queries that can potentially be improved through eager loading or counter cache column. A variety of notification alerts are supported.
(6 minutes)