Relations

With the annotation @Relations applied on a collection or array field in a class annotated with @Document, the nested objects are fetched from the database over a graph traversal with your current object as the starting point. The most relevant parameter is edge. With edge you define the edge collection - which should be used in the traversal - using the class type. With the parameter depth you can define the maximal depth for the traversal (default 1) and the parameter direction defines whether the traversal should follow outgoing or incoming edges (default Direction.ANY).

Examples

@Document(value="persons")
public class Person {
  @Relations(edge=Relation.class, depth=1, direction=Direction.ANY)
  private List<Person> friends;
}

@Edge(name="relations")
public class Relation {

}

Note: The annotation @Relations also work on non-collection/non-array fields. If multiple documents are linked with the entity, it is not guaranteed that the same document is returned every time. Use at your own risk.