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EclipseとJBOSSToolを使用して、MySQLからHibernateクラスを生成しています。給与テーブルには複合キーがあり、1つはFK（userId）、もう1つはAUTO_INCREMENTです。そのため、JBOSS ToolはSalaryクラスとUserクラスを生成し、SalaryIdクラスも生成しました。UserクラスのgetSalariesメソッドにカスケードを追加しましたが、新しいユーザーを保存しようとすると、常に例外が発生します： org.hibernate.exception.ConstraintViolationException：子行を追加または更新できません：外部キー制約が失敗します

誰かが私がこの問題を解決するのを手伝ってくれるアイデアがありますか？どうもありがとう〜

以下は私のテーブル構造です：

CREATE TABLE IF NOT EXISTS `salary` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `userId` int(11) NOT NULL,
 `amount` int(11) NOT NULL,
 `comingDate` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
 PRIMARY KEY (`id`,`userId`),
 KEY `userId` (`userId`)
)

以下は私の生成されたクラスです：[ユーザークラス]

@Entity
@Table(name = "user", catalog = "lab")
public class User implements java.io.Serializable {

    private Integer id;
    private String name;
    private String password;
    private String email;
    private Set<Salary> salaries = new HashSet<Salary>(0);

    public User() {
    }

    public User(String name, String password, String email, Set<Salary> salaries) {
        this.name = name;
        this.password = password;
        this.email = email;
        this.salaries = salaries;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Integer getId() {
        return this.id;
    }
    public void setId(Integer id) {
        this.id = id;
    }

    @Column(name = "name", nullable = false, length = 100)
    public String getName() {
        return this.name;
    }
    public void setName(String name) {
        this.name = name;
    }

    @Column(name = "password", nullable = false, length = 100)
    public String getPassword() {
        return this.password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    @Column(name = "email", nullable = false, length = 50)
    public String getEmail() {
        return this.email;
    }
    public void setEmail(String email) {
        this.email = email;
    }

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "user", cascade = CascadeType.ALL)
    public Set<Salary> getSalaries() {
        return this.salaries;
    }
    public void setSalaries(Set<Salary> salaries) {
        this.salaries = salaries;
    }
}

【給与クラス】 

@Entity
@Table(name = "salary", catalog = "lab")
public class Salary implements java.io.Serializable {

    private SalaryId id;
    private User user;
    private int amount;
    private Date comingDate;

    public Salary() {
    }

public Salary(SalaryId id, User user, int amount) {
        this.id = id;
        this.user = user;
        this.amount = amount;
    }

    public Salary(SalaryId id, User user, int amount, Date comingDate) {
        this.id = id;
        this.user = user;
        this.amount = amount;
        this.comingDate = comingDate;
    }

    @EmbeddedId
    @AttributeOverrides({
            @AttributeOverride(name = "id", column = @Column(name = "id", nullable = false)),
            @AttributeOverride(name = "userId", column = @Column(name = "userId", nullable = false)) })
    public SalaryId getId() {
        return this.id;
    }

    public void setId(SalaryId id) {
        this.id = id;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "userId", nullable = false, insertable = false, updatable = false)
    public User getUser() {
        return this.user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    @Column(name = "amount", nullable = false)
    public int getAmount() {
        return this.amount;
    }

    public void setAmount(int amount) {
        this.amount = amount;
    }

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "comingDate", nullable = false, length = 19)
    public Date getComingDate() {
        return this.comingDate;
    }

    public void setComingDate(Date comingDate) {
        this.comingDate = comingDate;
    }
}

以下は、JBOSSツールによって自動生成されたものです。

[SalaryIdクラス]

@Embeddable
public class SalaryId implements java.io.Serializable {

    private int id;
    private int userId;

    public SalaryId() {
    }

    public SalaryId(int id, int userId) {
        this.id = id;
        this.userId = userId;
    }

    @Column(name = "id", nullable = false)
    public int getId() {
        return this.id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Column(name = "userId", nullable = false)
    public int getUserId() {
        return this.userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public boolean equals(Object other) {
        if ((this == other))
            return true;
        if ((other == null))
            return false;
        if (!(other instanceof SalaryId))
            return false;
        SalaryId castOther = (SalaryId) other;

        return (this.getId() == castOther.getId())
                && (this.getUserId() == castOther.getUserId());
    }

    public int hashCode() {
        int result = 17;

        result = 37 * result + this.getId();
        result = 37 * result + this.getUserId();
        return result;
    }
}

【メインクラス】

transaction = session.beginTransaction();
SalaryId salaryId = new SalaryId();
Set<Salary> salaries = new HashSet<Salary>();

User user = new User();
user.setName("JW");
user.setPassword("123456");
user.setEmail("jjj@jj.cc");

salaries.add(new Salary(salaryId, user, 10000));
user.setSalaries(salaries);

session.save(user);

transaction.commit();
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1 に答える 1

-1

このようにしてみてください：

transaction = session.beginTransaction();
SalaryId salaryId = new SalaryId();
Set<Salary> salaries = new HashSet<Salary>();

User user = new User();
user.setName("JW");
user.setPassword("123456");
user.setEmail("jjj@jj.cc");

session.save(user);

salaries.add(new Salary(salaryId, user, 10000));
//user.setSalaries(salaries);

transaction.commit();
于 2012-07-09T10:18:03.403 に答える