JpaSystemException:尝试使用Jpa和Hibernate从空的一对一属性错误分配id。

Question

Resolved [org.springframework.orm.jpa.JpaSystemException: attempted to assign id from null one-to-one property [com.example.bootapp.entity.Employee.user]; nested exception is org.hibernate.id.IdentifierGenerationException: attempted to assign id from null one-to-one property [com.example.bootapp.entity.Employee.user]]

用户实体

@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
@JoinColumn(name = "id")
@JsonIgnore
@Getter @Setter
private Employee employee;

雇员实体

@OneToOne(fetch = FetchType.LAZY)
@MapsId
@JsonIgnore
private User user;

提前感谢！

Answer 1

解决了！

user.setEmployee(null); // I added this line
        userCommandService.save(user);
        employee.setUser(user);
        employeeCommandService.save(employee);

通过将用户实体中的employee设置为null，我的错误消失了！