在春季启动时将一个实体及其相关实体保存在一次保存中

Question

我有一个实体Period

@Entity
@Table(name = "period")
public class Period implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    @Enumerated(EnumType.STRING)
    @Column(name = "day_of_week")
    private DayOfWeek dayOfWeek;

    @Column(name = "start_time")
    private LocalTime startTime;

    @Column(name = "end_time")
    private LocalTime endTime;

    @JsonIgnoreProperties(value = { "period" }, allowSetters = true)
    @OneToOne
    @JoinColumn(unique = true)
    private Periodicity periodicity;

与之相关的实体Periodicity

@Entity
@Table(name = "periodicity")
public class Periodicity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    @Enumerated(EnumType.STRING)
    @Column(name = "periodicity_label")
    private TypeOfPeriodicity periodicityLabel;

    @Column(name = "end_time")
    private LocalTime endTime;

    @JsonIgnoreProperties(value = { "periodicity", "resource" }, allowSetters = true)
    @OneToOne(mappedBy = "periodicity")
    private Period period;

同时也是一个枚举TypeOfPeriodicity

public enum TypeOfPeriodicity {
    JOURNALIER,
    HEBDOMADAIRE,
    MENSUEL,
    SEMESTRIEL,
    TRIMESTRIEL,
    ANNUEL,
}

在创建新句点时，在字体结束时，我指定该句点的TypeOfPeriodicity。在后端，我想从句点取TypeOfPeriodicity和endTime，同时使用这些属性保存一个新的周期性。知道怎么做吗？我需要帮助。

Answer 1

在周期类中，可以使用@OneToOne(cascade = CascadeType.ALL, orphanRemoval = true)使hibernate在保存周期实体时保持周期性实体。有关https://www.baeldung.com/jpa-cascade-types类型的更多信息，请参见CascadeType，通常使用的都是