Full Stack Development with JHipster - Second Edition

Relationships

Now that we have defined our entities, let's add relationships between them:

1. Add the following snippet for relationships into the JDL-Studio editor:

relationship OneToOne {    Customer{user} to User}

The first relationship declared is a unidirectional OneToOne between a Customer entity and the inbuilt User entity:

Customer (1) -----> (1) User

It means that the Customer entity knows about the User and is the owner of the relationship, but the User doesn't know about the Customer, and so we will not be able to obtain customers from a User. This lets us map customers to the User entity and use it for authorization purposes later, ensuring that one customer can be mapped to only one system user.

2. Add the following snippet for relationships ...