Question

I have problems with creating relationships in a NEO4J Db with SDN. The attached nodes are created, just the relationships are missing.

复合服务

@Node("Service")
@Data(staticConstructor = "of")
public final class ServiceEntity {

  @Id
  private final Long id;
  private final String name;

  @Relationship(type = "handles", direction = INCOMING)
  private final AuthorityEntity authority;

  @Relationship("gives")
  private final 物品Entity output;

  @Relationship(value = "needs", direction = INCOMING)
  private final Collection<物品Entity> input;
}

物品

@Node("物品")
@Data(staticConstructor = "of")
public class 物品Entity {

  @Id
  private final Long id;
  private final String name;
}

Authority

@Node("Authority")
@Data(staticConstructor = "of")
public class AuthorityEntity {

  @Id
  private final String name;
}

新4j 交存

public interface ServiceSpringRepository extends 新4j 交存<ServiceEntity, Long> {

}

Whenever I save some Services it will create all the attached Service, 物品 and Authority nodes, but without any relationships. The view looks like as follows for match(n) return n

<代码>match(n)-[r]->m) 回去n,r,m 我没有记录。

数据库概览认为:

Answer 1

任何@Node都必须有有效的@Id关系。参见:

@Node("Authority")
@Data(staticConstructor = "of")
public class AuthorityEntity {

  @Id
  @Generated
  private final String name;
}

友情链接