Question

我有以下域类：

@Entity
@Table(name="ADDRESSBOOK_FIELD")
@Inheritance(strategy=InheritanceType.JOINED)
public abstract class AbstractAddressbookField {
   private int dbID;
   private Addressbook addressbook;

   public AbstractAddressbookField() {
   }

   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   public int getId() {
      return dbID;
   }

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

   @ManyToOne
   @JoinColumn(nullable=false)
   public Addressbook getAddressbook() {
      return addressbook;
   }

   public void setAddressbook(Addressbook addressbook) {
      this.addressbook = addressbook;
   }

}

@Entity
@Table(name="DATE_FIELD")
public class DateField extends AbstractAddressbookField {
    public DateField() {

    }
}

@Entity
@Table(name="NEW_ADDRESSBOOK")
public class Addressbook {
    private int dbID;
    private Set<DateField> dateFields = new HashSet<DateField>();

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    public int getDbID() {
        return dbID;
    }

    public void setDbID(int dbID) {
        this.dbID = dbID;
    }

    @OneToMany(mappedBy="Addressbook", cascade={CascadeType.ALL})
    public Set<DateField> getDateFields() {
        return dateFields;
    }

    public void setDateFields(Set<DateField> dateFields) {
        this.dateFields = dateFields;
    }
}

正在正确扫描我的软件包以获取所有映射，但我收到以下异常：

Caused by: org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: fields.DateField

我不确定为什么会这样，因为该类已明确映射到。

Answer 1

看起来该实体未映射到'persistence.xml'文件中。

Answer 2

我认为你的问题是大写字母：

@OneToMany(mappedBy="Addressbook", cascade={CascadeType.ALL})
public Set<DateField> getDateFields() {
   return dateFields;
}

改为使用mappedBy="addressbook。

带有连接的继承注释的OneToMany映射：

2 个答案: