#395 Action Controller Walkthrough pro

Dec 02, 2012 | 11 minutes | Controllers, Rack, Code 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.

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          terminal
        
rake middleware
git clone https://github.com/rails/rails.git
cd rails
git checkout 3.2.9

          rails console
        
puts ArticlesController.ancestors
puts ArticlesController.ancestors - ArticlesController.included_methods
ArticlesController.action(:index)
ArticlesController.method(:action).source_location

          articles_controller.rb
        
class ArticlesController < ApplicationController
  use Rack::ShowExceptions, only: :show
  # ...
end