mappedBy在休眠中不能與繼承一起使用。任何解決方法？

Question

考慮以下三類

@Entity 
@Inheritance(strategy = InheritanceType.JOINED) 
@SequenceGenerator(name = "GenericIdGenerator", 
sequenceName = "GENERIC_SEQ", initialValue = 1) 
@Table(name = "tbl_datastores") 
public abstract class DataStore implements Serializable { 

    private int storeId; 

    public getStoreId() 
    { 
     return this.storeId; 
    } 

    //..other code removed for brevity. 
} 

@Entity 
@Table(name = "tbl_filedatastores") 
public class FileDataStore extends DataStore { 

    private Set<FieldDetails> fields; 

    @OneToMany(mappedBy="datastore") 
    public getFields() 
    { 
     return this.fields; 
    } 
    //..other code removed for brevity. 
} 

@Entity 
@Table(name="tbl_fields") 
@SequenceGenerator(name = "GenericIdGenerator", 
sequenceName = "GENERIC_SEQ", initialValue = 1) 
public class FieldDetails 
{ 
    private int fieldId; 
    private DataStore datastore; 

    @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="GenericIdGenerator") 
    @Column(name="id", nullable=false, updatable=false) 
    public int getFieldId() { 
     return fieldId; 
    } 

    @ManyToOne 
    @JoinColumn (name="datastore_id", referencedColumnName="id") 
    public FileDataStore getDataStore(){ 
     return datastore; 
    } 
    //..other code removed for brevity. 
} 

當我運行這段代碼，我得到以下錯誤...

org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: entities.FieldDetails.datastore in entities.FileDataStore.fields 

我已經看到了一些posts，似乎表明它是一個Hibernate的問題，但我無法在任何地方獲得妥善的解決方案

你可以請建議一種方法來映射這種休眠或解決方法嗎？

預先感謝您！

Answer 1

請注意屬性名稱中字符大小寫的區別。它應該是

@OneToMany(mappedBy="dataStore") 
... 
public FileDataStore getDataStore(){ ... } 

或

@OneToMany(mappedBy="datastore") 
... 
public FileDataStore getDatastore(){ ... }