Question

我在数据后插入HSQL：

INSERT INTO Consumer(id,ConsumerId,CREATEDBY,CREATEDAT,FK_Service,ConsumerType) VALUES(300,'adsgvcg-cvvce-hvchwec','sm',CURRENT_TIMESTAMP,1,'INTERNAL');

我有以下从表中读取的类：

Entity(name = "Consumer")
@Table(name = "Consumer")
public class Consumer extends Base {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    @Column(name = "ID")
    private long id;

     @Basic(optional = false)
     @Column(name = "ConsumerId", nullable = false)
     private String ConsumerId;

    @Basic(optional = false)
    @Column(name = "ConsumerType", nullable = false)
    private String ConsumerType;

    @Basic//(optional = false)
    @Column(name = "FK_Service", nullable = true)
    private String service;

//Getter Setters etc

，基类如下：

public class Base implements Serializable{

    @Basic
    @Column(name = "MODIFIEDBY", nullable = true)
    private String ModifiedBy;

    @Basic
    @Column(name = "MODIFIEDAT", nullable = true)
    private Timestamp ModifiedAt;

    @Basic
    @Column(name = "CREATEDBY", nullable = true)
    private String CreatedBy;

    @Basic
    @Column(name = "CREATEDAT", nullable = true)
    private Timestamp CreatedAt;

//Getter Setters etc

当我运行代码时，我遇到以下异常：

2015-07-25 22:21:12,875 ERROR [main] hbm2ddl.SchemaExport.? (?:?) - HHH000388: Unsuccessful: INSERT INTO Consumer(id,ConsumerId,CREATEDBY,CREATEDAT,FK_Service,ConsumerType) VALUES(300,'adsgvcg-cvvce-hvchwec','smenon2',CURRENT_TIMESTAMP,1,'INTERNAL')
2015-07-25 22:21:12,875 ERROR [main] hbm2ddl.SchemaExport.? (?:?) - user lacks privilege or object not found: CREATEDBY

但是，当我将字段从基类移动到父类（Consumer）类时，不再出现此异常，并且字段也会被填充。

Answer 1

您需要在休眠中使用inheritance strategy 在基础实体中，您需要添加注释，以便hibernate知道要使用哪种策略。

@MappedSuperclass

或

@Inrtrtitance（strategy = InheritanceType.SINGLE_TABLE）您可以使用以下策略之一：

InheritanceType.SINGLE_TABLE
InheritanceType.TABLE_PER_CLASS
InheritanceType.JOINED

此wikibook page可能会有所帮助。

JPA HSQL不从扩展类中获取字段

1 个答案: