The components used in Rails are as follows:

Action CONTROLLER: it is the component that manages all other controllers and process the INCOMING request to the Rails application.

It extracts the PARAMETERS and dispatches the response when an action is performed on the application.

It provides services like session management, template rendering and redirect management.
Action View: it manages the views of the Rails application and it CREATES the output in both HTML and XML format.

It also provides the management of the templates and gives the AJAX support that is being used with the application.

Active Record: It provides the base platform for the models and gets used in the Rails application. It provides the database independence, CRUID functionality, search capability and setting the relationship between different models.

Action MAILER: It is a framework that provides email services to build the platform on which flexible templates can be implemented.

The components used in Rails are as follows:

Action Controller: it is the component that manages all other controllers and process the incoming request to the Rails application.

It extracts the parameters and dispatches the response when an action is performed on the application.

It provides services like session management, template rendering and redirect management.
Action View: it manages the views of the Rails application and it creates the output in both HTML and XML format.

It also provides the management of the templates and gives the AJAX support that is being used with the application.

Active Record: It provides the base platform for the models and gets used in the Rails application. It provides the database independence, CRUID functionality, search capability and setting the relationship between different models.

Action Mailer: It is a framework that provides email services to build the platform on which flexible templates can be implemented.