A one-to-many example for ObjectBox.

RelationExample.java

@Entity
public class Zoo {

    @Id
    private long id;


    // a Zoo can have many Animals
    @Backlink
    ToMany<Animal> animals;
  
    ...
}

@Entity
public class Animal {
    @Id(assignable = true)
    private long id;

    private String name;

    private boolean flying;

    private boolean swimming;

    private boolean walking;

    // an Animal belongs to one Zoo
    ToOne<Zoo> zoo;
  
    ...
}