Rest Controller Merge Objects

I’ve got this Event object in database, which has a EventType attribute.

In Database, I represent this by a separate EventType master table which contains all types (this is a static table), and a foreign key in the Event table.

I used gii to generate the model and CRUD forms, including relations.

I then followed the REST api controller tutorial here.

My question is, I want my REST list and view actions to return all data from Event, but instead of returning the idEventType attribute, I want the actual EventType attributes (namely a description and a numeric code) to be returned, as though both objects would merge.

How would you do that?