Spring Boot数据休息时间戳解析错误

Posted 2023-02-27

【中文标题】Spring Boot数据休息时间戳解析错误

【英文标题】：Spring boot data rest timestamp parse error

【发布时间】：2019-03-16 02:24:56

【问题描述】：

我正在尝试使用数据休息进行 CRUD 操作，但在将第一条记录插入数据库后，我无法从数据库中检索数据作为 json

这是我的代码：

模型类

@Entity
@Table(name="ledger_group")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
@EntityListeners(AuditingEntityListener.class)
@Data
public class LedgerGroup implements Serializable 
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy= GenerationType.AUTO)
    private Integer id;

    @Column(name = "key_code")
    private Integer keyCode;

    @Column(name="ledger_group")
    private String ledgerGroupName;

    @ManyToOne
    @JoinColumn(name = "parent")
    private LedgerGroup parent;

    @OneToMany(mappedBy = "parent")
    @JsonIgnore
    private List<LedgerGroup> ledgerGroupList;

    @CreatedDate
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="timestamp_created")
    private Date timestampCreated;

    @LastModifiedDate
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="timestamp_modified")
    private Date timestampModified;

    //bi-directional many-to-one association to LedgerAccount
    @OneToMany(mappedBy="ledgerGroup", cascade = CascadeType.ALL)
    @JsonIgnore
    private List<LedgerAccount> ledgerAccounts;

    //bi-directional many-to-one association to User
    @Column(name="user_created")
    private String createdBy;

    //bi-directional many-to-one association to User
    @Column(name="user_modified")
    private String lastModifiedBy;

    public LedgerGroup() 
    

存储库

@RepositoryRestResource
public interface LedgerGroupRepository extends PagingAndSortingRepository<LedgerGroup, Integer> 

这是来自浏览器的错误

这是来自控制台的错误

2018-10-11 10:27:27.911  WARN 11122 --- [nio-8080-exec-4] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Invalid Object Id definition for com.icloud.micro.model.LedgerGroup: cannot find property with name 'id'; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Invalid Object Id definition for com.icloud.micro.model.LedgerGroup: cannot find property with name 'id' (through reference chain: org.springframework.hateoas.PagedResources["_embedded"]->java.util.Collections$UnmodifiableMap["ledgerGroups"]->java.util.ArrayList[0])]

【问题讨论】：

请提供 DB 端 id 名称。这是数据库端的汽车吗？

【参考方案1】：

请删除此行

@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")