Domain Model

A one-to-one bi-directional relationship is a one-to-one relationship that refers back both ways, from parent to child and vice versa. If you find a real-life situation where the relationship is one-to-one and you need to traverse in both directions, then use a one-to-one bi-directional relationship.

We will use the same flow of starting with the user interface tracked by the service development and slowly add in both the modules at the conclusion of the chapter.