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POorg.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing
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  1. POorg.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing
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    copied!<p>In my project I have <code>User</code>, <code>Role</code>, <code>UserRole</code> and <code>BloodGroup</code> entities. Firstly I take <code>List&lt;BloodGroup&gt;</code> from DB and set to <code>User</code>. Then I give <code>User</code> and <code>Role</code> entites to <code>UserRole</code>. After that I insert <code>User</code> to DB, then I try to insert <code>UserRole</code>, but I get an error. When I look to DB, the ID of <code>BloodGroup</code> isn't inserted in <code>User</code> table.</p> <p>If I choose the first <code>BloodGroup</code> in the list, I get an error. Other options is normal.</p> <p>I look at the internet, I found <code>cascade = CascadeType.ALL</code>, but this add same data to <code>BloodGroup</code>, which means I have more Arh+ <code>BloodGroup</code>.</p> <p>The entities:</p> <pre><code>@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&lt;Userrole&gt; userroles; //bi-directional many-to-one association to Bloodgroup @ManyToOne @JoinColumn(name="BLOODGRUPID") private Bloodgroup bloodgroup; } </code></pre> <hr> <pre><code>@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&lt;User&gt; users; } </code></pre> <hr> <pre><code>@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; } </code></pre> <p>Controller:</p> <pre><code>user.setBloodgroup(bloodGroupImpl.getBloodGroupById(bGroup)); user.setUserid(userImpl.insertUserProfile(user)); userRoleImpl.insertUserRole(user,role); </code></pre> <p>DAO:</p> <pre><code>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); } </code></pre> <p>Log:</p> <pre><code>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) </code></pre>
 

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