Agile Web Development with Rails 5.1

Processing of Requests

In the previous section, we worked out how Action Dispatch routes an incoming request to the appropriate code in your application. Now let’s see what happens inside that code.

Action Methods

When a controller object processes a request, it looks for a public instance method with the same name as the incoming action. If it finds one, that method is invoked. If it doesn’t find one and the controller implements method_missing, that method is called, passing in the action name as the first parameter and an empty argument list as the second. If no method can be called, the controller looks for a template named after the current controller and action. If found, this template is rendered directly. If none of these things happens, ...