Question

所以我有一个schedule类，其中包含一个ScheduleDateActiveItem列表，它有一个“date”属性。我在Schedule对象中设置列表并保存schedule对象，使用crudrepository保存对象，但里面有“date”属性检索保存的对象时，ScheduleDateActiveItem为null。使用调试我已经确认我要保存的对象包含date属性，所以当我保存它时会出错。在数据库中，为DateActiveScheduleItem创建一个带有Id的条目，但是date和schedule_id为null < / p>

    for key,value in data:
        print(key, value)

DateActiveScheduleItem

 @Entity
 public class Schedule {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@ManyToOne
@JoinColumn(name = "user_id")
private User user;

@ManyToOne
@JoinColumn(name = "usergroup_id")
private UserGroup userGroup;

private String description;


private boolean master;//is this a schedule for all supervalus(true) or one supervalu(false)

@OneToMany(mappedBy = "schedule",cascade = CascadeType.PERSIST)
private List<DateActiveScheduleItem> dateActiveScheduleItems = new ArrayList<>();

@OneToMany(mappedBy = "schedule",cascade = CascadeType.PERSIST)
private List<MusicScheduleItem> musicScheduleItems = new ArrayList<>();

@OneToMany(mappedBy = "schedule",cascade = CascadeType.PERSIST)
private List<AdvertisementScheduleItem> advertisementScheduleItems = new ArrayList<>();

@Basic
@Temporal(TemporalType.DATE)
private java.util.Date dateAdded;
//getters setters}

Answer 1

在日程安排的dateActiveScheduleItems上将级联类型更改为CascadeType.MERGE修复它。

Hibernate：对象内的Date属性未保存到数据库

1 个答案: