Hibernate One to many Mapping Error - spring

Question

I'm going to develop hospital management system.in that there is a mapping like below.
doctor can select tablets[selectedTablets] ---> they inserted to Eprescriber form and saved as a record.at begin there is these fields. patient Name & SelectedTablets for him
But when i'm going to develop its gives me a below error.i refer Mkyong Tutorials for my hibernate part.
please help me to sort out this issue.
here is my bean classes. is there any issue with my mappings with my business logic
#Entity
#Table(name = "E_PRESCRIBER")
public class EPrescriber implements Serializable {
private static final long serialVersionUID = 440529869955257543L;
public EPrescriber() {
super();
}
public EPrescriber(int ePrescriberid, List<SelectedTablets> selectedTablets) {
this.ePrescriberid = ePrescriberid;
this.selectedTablets = selectedTablets;
}
#Id
#Column(name = "ePrescriberid" ,unique = true, nullable = false)
#SequenceGenerator(name = "ePrescriber_seq", sequenceName = "ePrescriber_id_seq")
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "ePrescriber_seq")
private int ePrescriberid;
public int getePrescriberid() {
return ePrescriberid;
}
public void setePrescriberid(int ePrescriberid) {
this.ePrescriberid = ePrescriberid;
}
#Column private String patientName;
public String getPatientName() {
return patientName;
}
public void setPatientName(String patientName) {
this.patientName = patientName;
}
#OneToMany(fetch = FetchType.LAZY,targetEntity=SelectedTablets.class, mappedBy = "ePrescriberid")
private List<SelectedTablets> selectedTablets=new ArrayList<SelectedTablets>();
public List<SelectedTablets> getSelectedTablets() {
return selectedTablets;
}
public void setSelectedTablets(List<SelectedTablets> selectedTablets) {
this.selectedTablets = selectedTablets;
}
}
another bean class here
#Entity
#Table(name = "SelectedTablets")
public class SelectedTablets implements Serializable {
private static final long serialVersionUID = 4854785134773287611L;
public SelectedTablets() {
}
#Id
#Column(name = "id", unique = true, nullable = false)
#SequenceGenerator(name = "selectedTablets_seq", sequenceName = "selectedTablets_id_seq")
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "selectedTablets_seq")
private int id;
#Column private Tablets tablets;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "ePrescriberid", nullable = true)
private EPrescriber ePrescriberid;
public EPrescriber getePrescriberid() {
return ePrescriberid;
}
public void setePrescriberid(EPrescriber ePrescriberid) {
this.ePrescriberid = ePrescriberid;
}
public Tablets getTablets() {
return tablets;
}
public void setTablets(Tablets tablets) {
this.tablets = tablets;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
here is the DAO class method. seems here is my issue. ? ? ?
#Repository
#Transactional
public class EPrescriberDAO {
#Autowired
private SessionFactory sessionFactory;
public void getTabletbyNameAndSave(String []selectedMedicines) {
EPrescriber ePrescriber=new EPrescriber();
List<SelectedTablets> selectedTabletsList=new ArrayList<SelectedTablets>();
for (String item : selectedMedicines) {
Tablets tablets=null;
String hql="from Tablets t where t.category='"+item.trim()+"' ";
Query queryList = sessionFactory.getCurrentSession().createQuery(hql);
tablets=(Tablets)queryList.uniqueResult();
SelectedTablets selectedTablets=new SelectedTablets();
selectedTablets.setTablets(tablets);
selectedTablets.setePrescriberid(ePrescriber);
selectedTabletsList.add(selectedTablets);
sessionFactory.getCurrentSession().save(selectedTablets);
}
ePrescriber.setPatientName("Ranil");
ePrescriber.setSelectedTablets(selectedTabletsList);
sessionFactory.getCurrentSession().save(ePrescriber);
}
}
if fault with my DAO, then please advice me too for correct those faults
-thanks
error log
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.priyan.patients.EPrescriber
at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:242)
at org.hibernate.type.EntityType.getIdentifier(EntityType.java:430)
at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:265)
at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:619)
at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3141)
at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:501)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:227)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:150)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:58)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:997)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1142)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:835)
at com.priyan.patients.EPrescriberDAO.getTabletbyNameAndSave(EPrescriberDAO.java:25)
at com.priyan.patients.EPrescriberDAO$$FastClassByCGLIB$$59da35c6.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
at com.priyan.patients.EPrescriberDAO$$EnhancerByCGLIB$$bb3659b.getTabletbyNameAndSave(<generated>)
at com.priyan.patients.ContactsControllers.setTabletsNames(ContactsControllers.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:879)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:617)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1760)
at java.lang.Thread.run(Unknown Source)

Answer 1

#ManyToOne(fetch = FetchType.LAZY,cascade = CascadeType.ALL)
#JoinColumn(name = "ePrescriberid", nullable = true)
private EPrescriber ePrescriberid;
SelectedTablets.java edited as above.now my issue sorted & thanks 4 all