Index ActiveRecord Scopes ActiveRecord scopes vs class methods AttributeMethods Reading Rails - Attribute Methods Rails API Doc Inside ActiveModel::AttributeMethods Validations on: :validation Tidbits Pluck it Querying Preload, Eagerload, Includes and Joins 3 ways to do eager loading (preloading) in Rails 3 & 4 Ruby Struct Structs inside out The Ruby 'Struct' Class Tidbits Tap that! Method Chaining Ruby method chaining A Guide to Method Chaining Eigen what? Singleton/Eigenclass Refinements Ruby 2.0 Refinements in Practice Custom Enumerable Implementing Enumerable Metaprogramming Sins of Metaprogramming Others Practical Object-Oriented Design in Ruby