Chapter 4 - Working with Controllers

Question 1

Action Callbacks

Answer 1

Action callbacks enable controllers to run shared pre- and postprocessing code for its actions. These callbacks can be used to do authentication, caching, or auditing before the intended action is performed.

before_action :require_authentication

Question 2

Action Callback Chain Skipping

Answer 2

Declaring an action callback on a base class conveniently applies to its subclasses, but sometimes a subclass should skip some of the action callbacks it inherits from a superclass:

skip_before_action :authenticate

Question 3

Action Callback conditions

Answer 3

before_action :authorize, only: [: edit, :delete]