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Validations in Rails 3
Rails 3 offers several new additions to validations. Here learn how to make a custom error_messages partial, reflect on validations, and clean up complex validations in a model.
(9 minutes)
Action Controller Walkthrough
Do you ever wonder what goes on behind the scenes when a Rails controller handles a request? What do the "render" and "redirect_to" methods do exactly? This and more covered as we walk through the code of ActionController::Base.
(11 minutes)
Generators in Rails 3
Generators in Rails 3 have been completely rewritten to be more modular. This allows you to customize any generator to fit your specific preferences.
(11 minutes)
ERB Blocks in Rails 3
Blocks in ERB templates are handled differently in Rails 3.0 Beta 2. Learn all about it in this episode.
(9 minutes)
Migrating to PostgreSQL
Postgres is a feature-packed relational database that every Rails developer should consider using. Here you will learn how to install it, add it to a new application, and transition from an existing SQLite app using the "taps" gem.
(8 minutes)
Eager Loading (revised)
One way to improve performance is to reduce the number of database queries through eager loading. Here I demonstrate this and compare the difference between the "includes" and "joins" methods.
(7 minutes)
Action View Walkthrough
Find out exactly what Rails is doing under the hood when it renders a view template for a response. What object context handles the template? How does the lookup process work? That and more covered in this code walkthrough.
(15 minutes)
A Look at Meteor
Meteor is a JavaScript framework for building rich client-side applications. Here I re-create the Raffler app to compare with Backbone.js and Rails. Meteor may not be related to Rails, but I think many will find it interesting.
(15 minutes)
Better Errors & RailsPanel
Here we take a look at two tools to aid us in development: Better Errors which makes it easier than ever to debug exceptions, and RailsPanel, a Chrome extension to see Rails requests.
(8 minutes)
Performance Testing
Learn how to add performance tests that automate benchmark and profile reports. Here I show how to find the bottlenecks to optimize a page. I also show how to compile Ruby with gcdata to get information about memory usage.
(16 minutes)