The Pragmatic Bookshelf | Agile Web Development with Rails, Third Edition

Noel Rappin discusses ways to keep up with edge Rails.

There are many wonderful things about Rails and the Rails ecosystem. A clean, well-lighted path for keeping all your extensions up to date is not one of them.

A while back, I had a requirement to persist a record of which email addresses were sent an email through the system. I expected to find callback support for ActionMailer, but was surprised to find that it didn't exist.

You should endeavor to tell objects what you want them to do; do not ask them questions about their state, make a decision, and then tell them what to do.

Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security implications in some versions of Ru...

ObjectiveResource is an Objective-C port of Ruby on Rails' ActiveResource. It provides a way to serialize objects to and from Rails' standard RESTful web-services (via XML or JSON) and handles much of the complexity involved with invoking web-serv...

Test-Driven Development (TDD) in its most dogmatic form (red-green-refactor in micro-iterations) can be tedious. It does not have to be this way! This guide shows a pragmatic approach with integration and unit tests, that works in practice and imp...

You can use the config.x configuration in combination with config_for to configure global settings for your Rails 4.2+ application.

Example

In your `config/application....

What do we expect from the custom finder? We expect that it should find assets A, B, C and should not find assets D, E, F. And sometimes the order is important: it should find A, B C with exact order.

If you need big synchronization points, e.g. for big marketing campaigns, you might be better off using an iterative development approach. If you want to ensure a continuous flow of features, which are optimized for time to market (cycle time), Ka...