An example of how to use relations in ObjectBox.

RelationUsageExample.java

Zoo myZoo = new Zoo();

Animal elephant = new Animal();
Animal giraffe = new Animal();

// To-one relation: Set the Zoo that an animal belongs to and save it to the database
elephant.zoo.setTarget(myZoo);
animalBox.put(elephant);

// To-one relation: Get the Zoo that an animal belongs to
Zoo elephantZoo = elephant.zoo.getTarget();


// To-many relation: Add Animals to the Zoo and save it to the database
myZoo.animals.add(elephant);
myZoo.animals.add(giraffe);
zooBox.put(myZoo);

// To-many relation: Get Animals that belongs to a Zoo
List<Animal> zooAnimals = myZoo.animals;