Spring boot 更新hibernate onetomany中的联接表id不工作

我是spring boot新手，我正在尝试在任务表中实现更新cid，但它不起作用

@Entity
@Table(name="kanban_col")
public class kanban_columns {
    @Id
    @GeneratedValue(generator="system-uuid")
    @GenericGenerator(name="system-uuid", strategy = "uuid")
    private String id;

    @Column(name="col_name")
    private String colName;

    @Column(name="kbid")
    private String boardId;

    @OneToMany(mappedBy = "kanban_col_id",cascade = CascadeType.PERSIST,orphanRemoval = true,fetch=FetchType.LAZY)
    private List<Tasks> tasks;

    Getter and setters....

 public void updatetasks(Tasks tasks){
        tasks.setKanban_col_id(this);

 }
}

服务

    @Transactional
    public kanban_columns UpdateTaskEntity(final kanban_columns source) {
        final kanban_columns destination = repository.findTaskById(source.getId());
        System.out.println(destination);
        updatedTask(source, destination);
        repository.save(destination);
        return destination;
    }

public void updatedTask(final kanban_columns source, final kanban_columns destination) {
        destination.updatetasks((Tasks) source.getTasks());
    }

存储库

    @Query("select kc from kanban_columns kc,Tasks t where t.id=:id")
    kanban_columns findTaskById(@Param("id") String id);

例外情况

JSON parse error: Cannot construct instance of `net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('ff80808174f95b8c0174f95ba1e30001'); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('ff80808174f95b8c0174f95ba1e30001')
 at [Source: (PushbackInputStream); line: 5, column: 22] (through reference chain: net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns["tasks"]->java.util.ArrayList[0]->net.guides.springboot.loginregistrationspringbootauthjsp.model.Tasks["kanban_col_id"]

JSON

我想更新使用@OneToMany和@ManyToOne映射连接的列cid（看板列id）。 我获取了id为的任务，但我尝试更新colcid，但它显示异常 任何人，请帮助我实现这一点

谢谢你

看看这个：

JSON parse error: Cannot construct instance of `net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('ff80808174f95b8c0174f95ba1e30001'); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('ff80808174f95b8c0174f95ba1e30001')
 at [Source: (PushbackInputStream); line: 5, column: 22] (through reference chain: net.guides.springboot.loginregistrationspringbootauthjsp.model.kanban_columns["tasks"]->java.util.ArrayList[0]->net.guides.springboot.loginregistrationspringbootauthjsp.model.Tasks["kanban_col_id"]

{
    "id":"ff80808174f95b8c0174f95ba1e30001",
     
        "tasks":[{
        "kanban_col_id":"ff80808174f95b8c0174f95ba1e30002"
    }
    ]
    
}