Rails Cookbook: Action Controller

Overview

In the Rails architecture, Action Controller receives incoming requests and hands off each request to a particular action. Action Controller is tightly integrated with Action View; together they form Action Pack. Action Controllers, or just "Controllers," are classes that inherit from ActionController::Base. These classes define the application's business logic. A real estate web application might have one controller that handles searchable housing listings, and another controller devoted to administration of the site. In this way, controllers are grouped according to the data they operate on. Controllers often correspond to the model that they primarily operate on, although this doesn't have to be the case.