Neo4j弹簧数据节点使用字符串作为@id
我正在尝试使用java.lang.String作为节点的@IdNeo4j弹簧数据节点使用字符串作为@id,neo4j,spring-data,spring-data-neo4j,Neo4j,Spring Data,Spring Data Neo4j,我正在尝试使用java.lang.String作为节点的@Id @NodeEntity(label = "MachineType") public class MachineType { @Id private String id; .... 根据弹簧数据neo4j docu,应可能: While an id is still required on all entities, the behavior has been simplified by introducin
@NodeEntity(label = "MachineType")
public class MachineType {
@Id private String id;
....
根据弹簧数据neo4j docu,应可能:
While an id is still required on all entities, the behavior has been
simplified by introducing the new @Id annotation. It replaces both
@GraphId and the primary attribute and can be placed on any attribute
with a simple type.
当我尝试插入时,我得到一个:
{
"cause": null,
"message": "Id must be assignable to Serializable!: null"
}
这很奇怪,因为字符串实现了序列化。
有人知道下一步在哪里搜索吗?我认为您不能使用其他任何东西作为ID。请记住,如果删除节点,此长数字将被重复使用 我使用plugin生成真正的唯一键,当我使用springdatarest时,我使用BackendIdConverter将我公开的资源的id更改为uuid 例如: 型号:
@NodeEntity
@资料
公共类目标{
@Id@GeneratedValue Long Id;//aClass){
返回Movie.class.equals(aClass);
}
}
@NodeEntity
@Data
public class Target {
@Id @GeneratedValue Long id; // <----Neo4j id
private String uuid; // <----My Key
@Version Long version;
private List<String> labels = new ArrayList<>();
@Relationship(type = "HAS_MEDIA", direction=Relationship.OUTGOING)
private List<Gallery> media = new ArrayList<>();
@Component
public class MovieIdConverter implements BackendIdConverter {
@Autowired MovieRepo movieRepository;
@Override
public Serializable fromRequestId(String id, Class<?> entityType) {
Movie movie = movieRepository.findByUuid(id);
return (Serializable) movie.getId();
}
@Override
public String toRequestId(Serializable serializable, Class<?> aClass) {
Long id = (Long) serializable;
Optional<Movie> movie = movieRepository.findById(id);
if (movie.isPresent()) return movie.get().getUuid();
return null;
}
@Override
public boolean supports(Class<?> aClass) {
return Movie.class.equals(aClass);
}
}