ConstraintViolationException：无法插入对象

Question

我正在实施银行应用程序并在我的数据库中有三个表（User，Account和AccountActivity）：

Account和AccountActivity类的实现如下所示：

@MappedSuperclass public abstract class AbstractDomain implements Serializable {

    @Id @GeneratedValue
    private long id = NEW_ID;

    public static long NEW_ID = -1;

    public long getId() {
        return id;
    }

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

    public boolean isNew() {

        return id==NEW_ID;
    }
}

@Table(name="ACCOUNT_ACTIVITY") 
@Entity
public class AccountActivity extends AbstractDomain {
    @Column(name="NAME")
    private String Name;

    @Column(name="XDATE")
    private Date Date;

    @Column(name="VALUE")
    private double Value;

    @ManyToOne(cascade=CascadeType.ALL)
    @JoinColumn(name="ACCOUNTID")
    private Account ACCOUNT;

    @ManyToOne(cascade=CascadeType.ALL)
    @JoinColumn(name="OTHERACCOUNTID")
    private Account OTHERACCOUNT;

    public String getName() {
        return Name;
    }

    // ...
}

和

@Table(name="ACCOUNT") 
@Entity
public class Account extends AbstractDomain {
    @Column(name="NAME")
    private String Name;

    @Column(name="XDATE")
    private Date Date;

    @Column(name="VALUE")
    private double Value;

    @ManyToOne(cascade=CascadeType.ALL)
    @JoinColumn(name="USERID")
    private User USER;

    @OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER)
    private List<AccountActivity> AccountActivity = new ArrayList<AccountActivity>();

    // ...
}

要在我的数据库中存储新帐户，我使用：

public Account storeAccount(Account ac) {
    User x = ac.getUser();
    x = em.merge(x);
    ac = em.merge(ac);
    return ac;
}

用于在我的数据库中存储新帐户。我想实现将帐户活动信息添加到已保存帐户时的功能， 该帐户将更新，并将添加的信息（帐户活动）级联到 AccountActivity表使用这段代码：

@OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER)
private List<AccountActivity> AccountActivity = new ArrayList<AccountActivity>();

当我测试此代码时，我收到错误：

  

java.sql.SQLException：完整性约束违规 - 无父级   FK670B7D019607336A表：声明中的ACCOUNT_ACTIVITY

有人可以帮我解决这个问题吗？

更新

我用这段junit代码测试：

public void testAddAccountActivities() {

    User user = dummyPersistedUser();
    User user2 = dummyPersistedUser();

    Account account = getTestUtils().dummyEmptyAccount(user);
    Account account2 = getTestUtils().dummyEmptyAccount(user2);

    account=accountManager.storeAccount(account);
    account2=accountManager.storeAccount(account2);

    getTestUtils().fillAccounts(account, account2);

    accountManager.storeAccount(account);
    accountManager.storeAccount(account2);

    assertEquals(2,accountManager.getAccount4Name(account.getName()).getAccountActivity().size());
    assertEquals(2,accountManager.getAccount4Name(account2.getName()).getAccountActivity().size());

}

其中fillAccounts(account, account2)只是插入一些应添加到图表中的AccountActivities。：

AccountActivity aa = new AccountActivity();
    aa.setDate(new Date());
    aa.setName("test activity");
    aa.setAccount(a1);
    aa.setValue(value);
    aa.setOtherAccount(a2);
    account.addAccountActivity(aa)

Answer 1

@OneToMany(cascade=CascadeType.ALL,fetch=FetchType.EAGER)
@JoinColumn(name ="accountid") // you have several references from AccountActivity to Account. You need to specify the join column in this case.
private List<AccountActivity> AccountActivity = new ArrayList<AccountActivity>();

Answer 2

作为第一个观察，我认为你不应该让变量名与该类相同。所以，而不是这个私人List＆lt; AccountActivity＆gt; AccountActivity，您可以编写类似私人列表＆lt; AccountActivity＆gt;的内容。 accountActivity。