【发布时间】：2013-11-30 10:36:50
【问题描述】：
您好，我在尝试获取我的架构定义的数据时遇到了一些问题，如下所示
购买的.java
@SuppressWarnings("serial")
@Entity
@Table(name="purchased_listing")
@DiscriminatorValue(value="purchased")
public abstract class Purchased extends BaseDo implements Reportable {
public Purchased() {
super();
}
//some implementation
}
reportable.java
public interface Reportable {
}
我还有另一个类约会.java，我正在使用多对一映射购买映射，如下所示
appointment.java
@SuppressWarnings("serial")
@Entity
@Table(name="appointments")
@DiscriminatorColumn(name="class_code")
@DiscriminatorValue("appointment")
public class Appointment extends BaseDo implements Delivery {
public Appointment() {
}
@ManyToOne
@JoinColumn(name="purchased_id")
private Purchased purchased;
}
和实现约会的接口delivery.java是这样的
public interface Delivery {
public long getId();
public DeliveryStatus getDeliveryStatus();
}
现在实际上当我尝试像这样查询时
public Appointment getAppointmentInfoByAppointmentId(long id) throws DaoException {
Iterator<Appointment> itr = getHibernateTemplate().iterate(
"from Appointment app where app.id = ?", id);
if (itr.hasNext()) {
return itr.next();
}
throw new DaoException("No appointment found with id = " + id);
}
当我试图检查返回约会对象时，我变得像 objectinvocation exception 并且在我的代码中当我试图喜欢时
appointment.getId();
我遇到了类似的错误
原因：com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'purchased1_.DTYPE' in 'field list'
为此苦苦挣扎，因为有一天找不到解决方案，所以为什么我要面对这个问题以及如何解决这个问题
【问题讨论】：
标签： java mysql hibernate hibernate-mapping