在我的項目中,我有User
,,UserRole
和BloodGroup
實體。首先我從DB獲取List<BloodGroup>
並設置爲User
。然後,我將User
和Role
轉交給UserRole
。之後,我將User
插入數據庫,然後嘗試插入UserRole
,但出現錯誤。當我查看DB時,BloodGroup
的ID未插入User
表中。org.hibernate.TransientObjectException:對象引用未保存的瞬態實例 - 保存沖洗前的瞬態實例
如果我在列表中選擇第一個BloodGroup
,則會出現錯誤。其他選項是正常的。
我在網上看,我找到了cascade = CascadeType.ALL
,但是這個數據相加到BloodGroup
,這意味着我有更多的arh + BloodGroup
。
的實體:
@Entity
@Table(name="USERS")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long userid;
@OneToMany(mappedBy="user")
private List<Userrole> userroles;
//bi-directional many-to-one association to Bloodgroup
@ManyToOne
@JoinColumn(name="BLOODGRUPID")
private Bloodgroup bloodgroup;
}
@Entity
public class Bloodgroup implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private int bloodgroupid;
private String bloodgroupname;
@OneToMany(mappedBy="bloodgroup")
private List<User> users;
}
@Entity
public class Userrole implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long userroleid;
private Timestamp createddate;
private Timestamp deleteddate;
private String isactive;
//bi-directional many-to-one association to Role
@ManyToOne
@JoinColumn(name="ROLEID")
private Role role;
//bi-directional many-to-one association to User
@ManyToOne
@JoinColumn(name="USERID")
private User user;
}
控制器:
user.setBloodgroup(bloodGroupImpl.getBloodGroupById(bGroup));
user.setUserid(userImpl.insertUserProfile(user));
userRoleImpl.insertUserRole(user,role);
DAO:
public void insertUserRole(User user, Role role) {
Session session =getHibernateTemplate().getSessionFactory().getCurrentSession();
Userrole uRole = new Userrole();
uRole.setIsactive("1");
uRole.setRole(role);
uRole.setUser(user);
session.save(uRole);
session.flush();
}
public void insertUserProfile(User user) {
Session session = getHibernateTemplate().getSessionFactory().getCurrentSession();
session.save(user);
}
登錄:
Hibernate:
insert
into
IU.Userrole
(userroleid, createddate, deleteddate, isactive, ROLEID, USERID)
values
(default, ?, ?, ?, ?, ?)
05.Şub.2012 19:23:29 com.sun.faces.application.ActionListenerImpl processAction
SEVERE: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.iu.eblood.model.Bloodgroup
javax.faces.el.EvaluationException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.iu.eblood.model.Bloodgroup
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:775)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1267)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:103)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:310)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
你能提供引發錯誤的代碼?只是爲了看看你如何保存實例。 – ivowiblo 2012-02-05 15:45:28
而不是嘗試在互聯網上發現的隨機事件,你應該嘗試瞭解錯誤的含義,檢測拋出異常的位置並修復錯誤。向我們展示完整的堆棧跟蹤和引發此異常的代碼。 – 2012-02-05 16:16:43