Question

当我加载我的初始测试数据时，我检索完整性约束违规异常。只有当我使用addShift方法添加2条以上的记录时才会发生这种情况。我在内存数据库中使用h2。

装载：

public void load() {
    shiftService.addShift(1, LocalDate.now(), ShiftType.DAY, 1);
    shiftService.addShift(2, LocalDate.now().plusDays(1), ShiftType.NIGHT, 1);
    shiftService.addShift(2, LocalDate.now().plusDays(5), ShiftType.NIGHT, 2);
}

班次服务：

@Transactional
public void addShift(long userId, LocalDate shiftDate, ShiftType shiftType, long groupId) {
    Optional<User> user = userService.findOne(userId);
    if (user.isPresent()) {
        Optional<Group> group = groupService.getOne(groupId);
        if (group.isPresent()) {
            Shift shift = new Shift(shiftDate, shiftType, group.get());
            user.get().addShift(shift);
        }
    }
}

引起：

org.h2.jdbc.JdbcSQLException: Referential integrity constraint 
violation: "FKG5R8KJRL3GG3EKESMHT77GO7L: PUBLIC.SHIFT FOREIGN KEY(ID) 
REFERENCES PUBLIC.GROUPS(ID) (3)"; SQL statement:
insert into shift (id, group_id, shift_date, shift_type) values (null, ?, ?, 
?) [23506-196]

型号：

切换：

@Entity
public class Shift {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private LocalDate shiftDate;
    private ShiftType shiftType;

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "user_shifts", joinColumns = @JoinColumn(name = "shift_id", referencedColumnName = "id"), inverseJoinColumns = @JoinColumn(name = "user_id", referencedColumnName = "id"))
    private Set<User> users = new HashSet<>();

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "group_id")
    private Group group;

组：

@Entity
@Table(name = "groups") // Group is reserved name in SQL
public class Group {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    private String name;

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "user_group", joinColumns = @JoinColumn(name = "group_id", referencedColumnName = "id"), inverseJoinColumns = @JoinColumn(name = "user_id", referencedColumnName = "id"))
    private Set<User> users = new HashSet<>();

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "moderator_group", joinColumns = @JoinColumn(name = "group_id", referencedColumnName = "id"), inverseJoinColumns = @JoinColumn(name = "user_id", referencedColumnName = "id"))
    private Set<User> moderators = new HashSet<>();

    @OneToMany(mappedBy = "id", cascade = CascadeType.ALL)
    private Set<Shift> shifts;

用户：

@Entity
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;

    private String email;
    private String password;
    private String firstName;
    private String lastName;
    private String phone;

    @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinTable(
            name = "user_authority",
            joinColumns = {@JoinColumn(name = "user_id", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "authority_name", referencedColumnName = "name")}
    )
    private Set<Authority> authorities = new HashSet<>();

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(
            name = "user_group",
            joinColumns = {@JoinColumn(name = "user_id", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "group_id", referencedColumnName = "id")}
    )
    private Set<Group> usingGroups = new HashSet<>();

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(
            name = "moderator_group",
            joinColumns = {@JoinColumn(name = "user_id", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "group_id", referencedColumnName = "id")}
    )
    private Set<Group> moderatingGroups = new HashSet<>();

    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinTable(
            name = "user_shifts",
            joinColumns = {@JoinColumn(name = "user_id", referencedColumnName = "id")},
            inverseJoinColumns = {@JoinColumn(name = "shift_id", referencedColumnName = "id")}
    )
    private Set<Shift> shifts = new HashSet<>();

你知道为什么我有这个例外吗？

Answer 1

您在Group中的映射是错误的。

@OneToMany(mappedBy = "id", cascade = CascadeType.ALL)
private Set<Shift> shifts;

这应该是：

@OneToMany(mappedBy = "group", cascade = CascadeType.ALL)
private Set<Shift> shifts;

<强>解释

Hibernate正在id中的shift和id中的group之间添加外键约束。您可能正在添加2个组，并且在尝试添加2个以上的班次后，未满足约束，因为ID为3的组不存在。

参照完整性约束违规 - 添加超过2条记录时失败

1 个答案: