io.objectbox.annotation

Annotation Type Backlink

@Retention(value=CLASS)
 @Target(value=FIELD)
 @Beta
public @interface Backlink

Defines a backlink relation, which is based on another relation reversing the direction.

Example (to-one relation): one "Order" references one "Customer". The backlink to this is a to-many in the reverse direction: one "Customer" has a number of "Order"s.

Example (to-many relation): one "Teacher" references multiple "Student"s. The backlink to this: one "Student" has a number of "Teacher"s.

Note: changes made to a backlink relation based on a to-many relation are ignored.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
java.lang.String	to Name of the relation the backlink should be based on (e.g.

Element Detail

to

public abstract java.lang.String to

Name of the relation the backlink should be based on (e.g. name of a ToOne or ToMany property in the target entity). Can be left empty if there is just a single relation from the target to the source entity.

Default:

""