Question

我正在尝试创建社交应用服务。我的用户有确认或未确认的关系。

当我加载UserA时，结果看起来像是爱。

   "result":{  
      "idUser":"UserA",
      "unconFriendships":[  
         {  
            "idUser":"UserB",
            "unconFriendships":[  
               {  
                  "idUser":"UserC",
                  "unconFriendships":[ 
                      ...

虽然它必须看起来像

   "result":{  
      "idUser":"UserA",
      "unconFriendships":[  
         {  
            "idUser":"UserB",
            "unconFriendships":null //only one level have to fetched
                   ....

我认为这是因为杰克逊json库，我重新编写代码。在序列化之前，我检查了userA对象，发现userA.unconFriendships.userB.unconFriendships不是null而且size大于0。

差不多已经12个小时了，仍然无法解决问题。请帮我解决这个问题。谢谢你的到来。

这是UserEntity.java

@Entity
@Table(name="aduser",uniqueConstraints=@UniqueConstraint(columnNames = {"idUser","nmEmail"}))
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="cdUser")
public class UserEntity extends BaseEntity {

    protected static final long serialVersionUID = 8864033727886664353L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO, generator = "admin_seq")
    @SequenceGenerator(name = "admin_seq", sequenceName = "CDUSER_SEQUENCE", allocationSize = 1)
    @Column(name="cdUser")
    private long cdUser;

    @OneToMany(mappedBy = "owner", targetEntity=Friendship.class)
    @JsonProperty
    protected Set<UnconfirmedFriendship> unconFriendships;

    @OneToMany(mappedBy = "owner", targetEntity=Friendship.class)
    @JsonProperty
    protected Set<UnconfirmedFriendship> conFriendships;
...

Friendship.java

@Entity
@Table(name="aduserfriend")
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "verified")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="friend_cduser",scope=UserEntity.class)
public abstract class Friendship extends BaseEntity{

    protected static final long serialVersionUID = -670863816551430192L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "cdFriendship")
    private long cdFriendship;

    @ManyToOne
    @JsonIgnore
    @JoinColumn(name = "owner_cduser")
    protected UserEntity owner;

    @ManyToOne
    @JoinColumn(name = "friend_cduser")
    protected UserEntity friend;

    @Column(name = "verified",insertable=false,updatable=false)
    private boolean verified;
...

UnconfirmedFriendship.java和ConfirmedFriendship.java

@Entity
@DiscriminatorValue(value = "0")//this value is 1 for Confirmed relationship
public class UnconfirmedFriendship extends Friendship {

    private static final long serialVersionUID = 57796452166904132L;
}

jpa一对多自我引用正在获取所有级别

0 个答案: