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从父端获取的ID-休眠一对一关系

jpa java

Arian · 技术社区 · 7 年前

我有一节课 UserAccountEntity 一对一的关系 UserEntity :

@Entity
@Table(name = "user_entity")
public class UserEntity implements Serializable {

    private static final long serialVersionUID = 2059380022311094257L;

    @Id
    @GeneratedValue(generator = RandomAlphanumericIdGenerator.generatorName)
    @GenericGenerator(name = RandomAlphanumericIdGenerator.generatorName, strategy = "com.myproject.project.core.utils.RandomAlphanumericIdGenerator")
    private String id;

    public UserEntity() {}

}

@Entity
@Table(name="user_account_entity")
public class UserAccountEntity implements UserDetails {

    @Id
    private String id;

    @MapsId
    @OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    private UserEntity user;
}

现在我想添加另一个类 UserAccountActivityCode ,它应该与 用户帐户实体 . 令我困惑的是 用户帐户实体 生成于 用户实体 . 我不知道该如何定义它的id?

我创建了一个类 用户帐户活动代码 :

@Entity
@Table(name = "User_account_activity_code")
public class UserAccountActivityCode implements Serializable {

    @Id
    @GeneratedValue(generator = RandomAlphanumericIdGenerator.generatorName)
    @GenericGenerator(name = RandomAlphanumericIdGenerator.generatorName, strategy = "com.myproject.project.core.utils.RandomAlphanumericIdGenerator")
    private String id;

    public UserAccountActivityCode() {}

}

但我该如何在 用户帐户实体 班级和地点 用户帐户实体 从那个案子里得到身份证?

更新1: 我出去了 GeneratedValue 由于 UserAccountActivityCodeEntity ,并添加 setUserId 保存时设置:

@Entity
@Table(name="user_account_activity_code_entity")
public class UserAccountActivityCodeEntity {

    private final static int ACTIVITY_CODE_LENGTH = 6;

    @Id
    private String userId;

    private String acitivityCode;
    public UserAccountActivityCodeEntity(String id) {
        this.acitivityCode = RandomStringUtils.randomAlphanumeric(ACTIVITY_CODE_LENGTH);
        this.userId = id;
    }

    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
    public String getAcitivityCode() {
        return acitivityCode;
    }
    public void setAcitivityCode(String acitivityCode) {
        this.acitivityCode = acitivityCode;
    }

}

我的服务层中有以下代码:

    userAccount = new UserAccountEntity(username,
            passwordEncoder.encode(password));
    userAccount.setUser(new UserEntity());
    UserAccountActivityCodeEntity activityCode = new UserAccountActivityCodeEntity(userAccount.getId());
    userAccount.setActivityCode(activityCode);
    userAccountRepository.save(userAccount);

从而导致此错误:

org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): com.myproject.project.core.entity.useraccount.UserAccountActivityCodeEntity

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