java– 无法处理托管后向引用’defaultReference’：找不到后引用属性_语言综合

概述我有两个模型类.一个是@Entity(name = 'userTools') @Table(uniqueConstraints = @UniqueConstraint(columnNames = { 'assignToUser_id','toolsType_id' })) @Inheritance(strategy = InheritanceType.JOI

我有两个模型类.一个是

@Entity(name = "userTools")@table(uniqueConstraints = @UniqueConstraint(columnnames = { "assignToUser_ID","toolsType_ID" }))@inheritance(strategy = inheritanceType.JOINED)@JsonTypeInfo(use = JsonTypeInfo.ID.CLASS,include = JsonTypeInfo.As.PROPERTY,property = "classname")@JsonIgnorePropertIEs(ignoreUnkNown = true)public class UserTools {    @ID    @GeneratedValue(strategy = GenerationType.auto)    private Long ID;    @OnetoOne    private ToolsType toolsType;    @OnetoMany(mappedBy = "userTools",fetch = FetchType.EAGER,cascade = { CascadeType.ALL },orphanRemoval = true)    @Cascade(org.hibernate.annotations.CascadeType.DELETE)    @JsonManagedReference    private List

第二是

@Entity(name = "userToolsHistory")@JsonIgnorePropertIEs(ignoreUnkNown = true)public class UserToolsHistory {    @ID    @GeneratedValue(strategy = GenerationType.auto)    private Long ID;    @OnetoOne    private ToolsType toolsType;    @ManyToOne    @JsonIgnore    @JsonBackReference    private UserTools userTools;     private String comments;}

但是在保存时我收到了这个错误：

Can not handle managed/back reference 'defaultReference': no backreference property found from type [collection type; classjava.util.List,contains [simple type,classcom.DW.model.tools.UserToolsHistory]]

最佳答案您面临的例外源于MapPingJackson2httpMessageConverter.
要修复它,请交换注释,以便获得：
public class UserTools {...@JsonBackReferenceprivate List
本教程解释了必须如何完成：jackson-bidirectional-relationships-and-infinite-recursion          总结       
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java– 无法处理托管后向引用’defaultReference’：找不到后引用属性

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