我有两个实体:EXAM 和 EXAM_NORMAL。
考试
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
private String name;
private String codeName;
@Enumerated(EnumType.STRING)
private ExamType examType;
@ManyToOne
private Category category;
@OneToMany(mappedBy="id",cascade=CascadeType.PERSIST)
@OrderBy("id")
private List<Exam_Normal> exam_Normal;
考试_正常
@Id
private Long item;
@Id
@ManyToOne
private Exam id;
@Enumerated(EnumType.STRING)
private Gender gender;
private Integer age_month_from;
private Integer age_month_to;
问题是,如果我尝试将 EXAM_NORMAL 列表放在 EXAM 类中,如果我尝试持久化(EXAM),我会收到一个错误,因为它首先尝试持久化 EXAM_NORMAL 但它不能因为 EXAM 的主键丢失,因为它不是坚持...
有没有办法定义顺序?或者我应该设置null
列表,坚持然后再次设置列表?
谢谢:)