Chapter 32. Core Data Relationships
It is time to delve a bit deeper into Core Data. In Chapter 11, you dealt with a single entity (
Car). In most applications, you will have multiple entities and relationships between them. Core Data supports to-one relationships and to-many relationships (ordered or unordered).
In this exercise, there will be two entities:
Department. An employee will work for one department. A department will have a set of employees; one employee (chosen from its set) will be a manager. Thus, there are three relationships (Figure 32.1).
Edit the Model
In this section, you are going to ...