Are you not using a LoadableDetacheble model?
And are you familiar with Hibernate's laizy loading?
Have a great day,
Paul Bors
> On May 18, 2014, at 6:08 AM, Piratenvisier <hansheinrichbr...@yahoo.de> wrote:
>
> Am 17.05.2014 23:08, schrieb mscoon:
>> I don't understand what these lines are doing. Are you reloading whatever
>> is already stored in your modelObject.kunde and setting it again to your
>> model object? Why?
> all ONETOMANY relationships which are set before I open the form
> cause problem with hibernate when I save the Model after I close the Form.
> When I set them once more as described below everything is OK.
> all ONETOMANY relationships which are set by the Form by DropDownChoices
> don't cause any problem.
>
>
>>
>> On Thu, May 8, 2014 at 7:50 AM, Piratenvisier
>> <hansheinrichbr...@yahoo.de>wrote:
>>
>>> If I include the folowing lines :
>>>
>>> if(NachweiseForm.this.getModelObject().getKunde()!=null) {
>>> Kunde kunde = kundeManager.get(NachweiseForm.this.
>>> getModelObject().getKunde().getId());
>>> NachweiseForm.this.getModelObject().setKunde(kunde);
>>> kunde.addNachweis(NachweiseForm.this.getModelObject());
>>> System.err.println("Kunde");
>>> }
>>>
>>> before the save
>>>
>>> everything is fine
>>>
>>> But I hoped to avoid such lines by AbstractEntityModel.
>>>
>>> My idea was to implant Kunde through the form.
>>>
>>> But how could you do it only by a Label.
>>>
>>> Am 05.05.2014 20:40, schrieb mscoon:
>>>
>>>> Actually what I said below is wrong because this line is after the line
>>>>
>>>> that throws the exception. But my explanation still holds. Something
>>>> before
>>>> the line that is throwing the exception is causing an object with a
>>>> reference to a new Nachweise
>>>> to be saved while the Nachweise is still unsaved. You need to search at
>>>> what is happening before the line with the exception, maybe even before
>>>> the
>>>> page is created.
>>>>
>>>>
>>>>
>>>> Now, a wild guess (I may well be wrong) is that the following line:
>>>>> nachweiseform.getModelObject().getKunde().addNachweis(nachwe
>>>>> iseform.getModelObject());
>>>>>
>>>>> may be causing the problem if hibernate tries to save kunde with
>>>>> nachweiseform.getModelObject()
>>>>> which is a new object with a null id.
>>>>>
>>>>> You may try to move this line to saveNachweise().
>>>>>
>>>>>
>>>>> On Mon, May 5, 2014 at 2:54 PM, Yahoo <hansheinrichbr...@yahoo.de>
>>>>> wrote:
>>>>>
>>>>> Am 05.05.2014 11:05, schrieb mscoon:
>>>>>> In a previous message you sent the following snippets:
>>>>>>
>>>>>>> //@XmlTransient
>>>>>>> @ManyToOne(cascade = CascadeType.MERGE,fetch=FetchType.LAZY)
>>>>>>> @JoinColumn(name="NachKundNr",insertable=false, updatable=false)
>>>>>>> public Kunde getKunde(){
>>>>>>> return this.kunde;
>>>>>>> }
>>>>>>>
>>>>>>> recursive Part for Kunde
>>>>>>>
>>>>>>>
>>>>>>> @XmlTransient
>>>>>>> @OneToMany(cascade={CascadeType.MERGE},fetch=FetchType.LAZY)
>>>>>>> @JoinColumn(name="NachKundNr",insertable=false, updatable=false )
>>>>>>>
>>>>>>> when I remove this I get the error :
>>>>>> org.hibernate.TransientObjectException: object references an unsaved
>>>>>> transient instance - save the transient instance before flushing:
>>>>>> braunimmobilien.model.Nachweise
>>>>>> at org.hibernate.engine.internal.ForeignKeys.
>>>>>> getEntityIdentifierIfNotUnsaved(ForeignKeys.java:249)
>>>>>> at org.hibernate.type.EntityType.getIdentifier(EntityType.java:
>>>>>> 459)
>>>>>> at org.hibernate.type.ManyToOneType.nullSafeSet(
>>>>>> ManyToOneType.java:132)
>>>>>> at org.hibernate.persister.collection.
>>>>>> AbstractCollectionPersister.
>>>>>> writeElement(AbstractCollectionPersister.java:867)
>>>>>> at org.hibernate.persister.collection.
>>>>>> AbstractCollectionPersister.
>>>>>> insertRows(AbstractCollectionPersister.java:1475)
>>>>>> at org.hibernate.action.internal.CollectionUpdateAction.execute(
>>>>>> CollectionUpdateAction.java:86)
>>>>>> at org.hibernate.engine.spi.ActionQueue.execute(
>>>>>> ActionQueue.java:362)
>>>>>> at org.hibernate.engine.spi.ActionQueue.executeActions(
>>>>>> ActionQueue.java:354)
>>>>>> at org.hibernate.engine.spi.ActionQueue.executeActions(
>>>>>> ActionQueue.java:278)
>>>>>> at org.hibernate.event.internal.AbstractFlushingEventListener.
>>>>>> performExecutions(AbstractFlushingEventListener.java:326)
>>>>>> at org.hibernate.event.internal.DefaultFlushEventListener.
>>>>>> onFlush(
>>>>>> DefaultFlushEventListener.java:52)
>>>>>> at org.hibernate.internal.SessionImpl.flush(SessionImpl.
>>>>>> java:1213)
>>>>>> at org.hibernate.internal.SessionImpl.managedFlush(
>>>>>> SessionImpl.java:402)
>>>>>> at org.hibernate.engine.transaction.internal.jdbc.
>>>>>> JdbcTransaction.
>>>>>> beforeTransactionCommit(JdbcTransaction.java:101)
>>>>>> at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.
>>>>>> commit(AbstractTransactionImpl.java:175)
>>>>>> at org.springframework.orm.hibernate4.
>>>>>> HibernateTransactionManager.
>>>>>> doCommit(HibernateTransactionManager.java:554)
>>>>>> at org.springframework.transaction.support.
>>>>>> AbstractPlatformTransactionManager.processCommit(
>>>>>> AbstractPlatformTransactionManager.java:755)
>>>>>> at org.springframework.transaction.support.
>>>>>> AbstractPlatformTransactionManager.commit(
>>>>>> AbstractPlatformTransactionMan
>>>>>> ager.java:724)
>>>>>> at org.springframework.transaction.interceptor.
>>>>>> TransactionAspectSupport.commitTransactionAfterReturnin
>>>>>> g(TransactionAspectSupport.java:475)
>>>>>> at org.springframework.transaction.interceptor.
>>>>>> TransactionAspectSupport.invokeWithinTransaction(
>>>>>> TransactionAspectSupport.java:270)
>>>>>> at org.springframework.transaction.interceptor.
>>>>>> TransactionInterceptor.invoke(TransactionInterceptor.java:94)
>>>>>> at org.springframework.aop.framework.ReflectiveMethodInvocation.
>>>>>> proceed(ReflectiveMethodInvocation.java:172)
>>>>>> at org.springframework.aop.interceptor.
>>>>>> ExposeInvocationInterceptor.
>>>>>> invoke(ExposeInvocationInterceptor.java:91)
>>>>>> at org.springframework.aop.framework.ReflectiveMethodInvocation.
>>>>>> proceed(ReflectiveMethodInvocation.java:172)
>>>>>> at org.springframework.aop.framework.JdkDynamicAopProxy.
>>>>>> invoke(JdkDynamicAopProxy.java:204)
>>>>>> at com.sun.proxy.$Proxy112.get(Unknown Source)
>>>>>> at java.lang.reflect.Method.invoke(Method.java:606)
>>>>>> at org.apache.wicket.proxy.LazyInitProxyFactory$
>>>>>> JdkHandler.invoke(
>>>>>> LazyInitProxyFactory.java:435)
>>>>>> at com.sun.proxy.$Proxy94.get(Unknown Source)
>>>>>> at braunimmobilien.webapp.nachweis.NachweisPanel.<init>(
>>>>>> NachweisPanel.java:100)
>>>>>> at braunimmobilien.webapp.nachweis.NachweisPage.<init>(
>>>>>> NachweisPage.java:47)
>>>>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:
>>>>>> 526)
>>>>>> at org.apache.wicket.session.DefaultPageFactory.newPage(
>>>>>> DefaultPageFactory.java:171)
>>>>>> at org.apache.wicket.session.DefaultPageFactory.newPage(
>>>>>> DefaultPageFactory.java:99)
>>>>>> at org.apache.wicket.DefaultMapperContext.newPageInstance(
>>>>>> DefaultMapperContext.java:137)
>>>>>> at org.apache.wicket.core.request.handler.PageProvider.
>>>>>> resolvePageInstance(PageProvider.java:268)
>>>>>> at org.apache.wicket.core.request.handler.PageProvider.
>>>>>> getPageInstance(PageProvider.java:166)
>>>>>> at org.apache.wicket.request.handler.render.PageRenderer.
>>>>>> getPage(PageRenderer.java:78)
>>>>>> at org.apache.wicket.request.handler.render.
>>>>>> WebPageRenderer.respond(
>>>>>> WebPageRenderer.java:271)
>>>>>> at org.apache.wicket.core.request.handler.
>>>>>> RenderPageRequestHandler.
>>>>>> respond(RenderPageRequestHandler.java:175)
>>>>>> at org.apache.wicket.request.cycle.RequestCycle$
>>>>>> HandlerExecutor.respond(RequestCycle.java:862)
>>>>>> at org.apache.wicket.request.RequestHandlerStack.execute(
>>>>>> RequestHandlerStack.java:64)
>>>>>> at org.apache.wicket.request.cycle.RequestCycle.execute(
>>>>>> RequestCycle.java:261)
>>>>>> at org.apache.wicket.request.cycle.RequestCycle.
>>>>>> processRequest(RequestCycle.java:218)
>>>>>> at org.apache.wicket.request.cycle.RequestCycle.
>>>>>> processRequestAndDetach(RequestCycle.java:289)
>>>>>> at org.apache.wicket.protocol.http.WicketFilter.
>>>>>> processRequestCycle(
>>>>>> WicketFilter.java:259)
>>>>>> at org.apache.wicket.protocol.http.WicketFilter.
>>>>>> processRequest(WicketFilter.java:201)
>>>>>> at org.apache.wicket.protocol.http.WicketFilter.doFilter(
>>>>>> WicketFilter.java:282)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler$CachedChain.
>>>>>> doFilter(ServletHandler.java:1338)
>>>>>> at com.opensymphony.sitemesh.webapp.SiteMeshFilter.
>>>>>> doFilter(SiteMeshFilter.java:65)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler$CachedChain.
>>>>>> doFilter(ServletHandler.java:1338)
>>>>>> at org.springframework.orm.hibernate4.support.
>>>>>> OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:
>>>>>> 152)
>>>>>> at org.springframework.web.filter.OncePerRequestFilter.
>>>>>> doFilter(OncePerRequestFilter.java:107)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler$CachedChain.
>>>>>> doFilter(ServletHandler.java:1338)
>>>>>> at braunimmobilien.webapp.MessageFilter.doFilter(
>>>>>> MessageFilter.java:32)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler$CachedChain.
>>>>>> doFilter(ServletHandler.java:1338)
>>>>>> at org.springframework.web.filter.CharacterEncodingFilter.
>>>>>> doFilterInternal(CharacterEncodingFilter.java:88)
>>>>>> at org.springframework.web.filter.OncePerRequestFilter.
>>>>>> doFilter(OncePerRequestFilter.java:107)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler$CachedChain.
>>>>>> doFilter(ServletHandler.java:1338)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler.doHandle(
>>>>>> ServletHandler.java:484)
>>>>>> at org.eclipse.jetty.server.handler.ScopedHandler.handle(
>>>>>> ScopedHandler.java:119)
>>>>>> at org.eclipse.jetty.security.SecurityHandler.handle(
>>>>>> SecurityHandler.java:524)
>>>>>> at org.eclipse.jetty.server.session.SessionHandler.
>>>>>> doHandle(SessionHandler.java:233)
>>>>>> at org.eclipse.jetty.server.handler.ContextHandler.
>>>>>> doHandle(ContextHandler.java:1065)
>>>>>> at org.eclipse.jetty.servlet.ServletHandler.doScope(
>>>>>> ServletHandler.java:413)
>>>>>> at org.eclipse.jetty.server.session.SessionHandler.
>>>>>> doScope(SessionHandler.java:192)
>>>>>> at org.eclipse.jetty.server.handler.ContextHandler.
>>>>>> doScope(ContextHandler.java:999)
>>>>>> at org.eclipse.jetty.server.handler.ScopedHandler.handle(
>>>>>> ScopedHandler.java:117)
>>>>>> at org.eclipse.jetty.server.handler.ContextHandlerCollection.
>>>>>> handle(
>>>>>> ContextHandlerCollection.java:250)
>>>>>> at org.eclipse.jetty.server.handler.HandlerCollection.
>>>>>> handle(HandlerCollection.java:149)
>>>>>> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(
>>>>>> HandlerWrapper.java:111)
>>>>>> at org.eclipse.jetty.server.Server.handle(Server.java:350)
>>>>>> at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(
>>>>>> AbstractHttpConnection.java:454)
>>>>>> at org.eclipse.jetty.server.AbstractHttpConnection.
>>>>>> headerComplete(
>>>>>> AbstractHttpConnection.java:890)
>>>>>> at org.eclipse.jetty.server.AbstractHttpConnection$
>>>>>> RequestHandler.headerComplete(AbstractHttpConnection.java:944)
>>>>>> at org.eclipse.jetty.http.HttpParser.parseNext(
>>>>>> HttpParser.java:630)
>>>>>> at org.eclipse.jetty.http.HttpParser.parseAvailable(
>>>>>> HttpParser.java:230)
>>>>>> at org.eclipse.jetty.server.AsyncHttpConnection.handle(
>>>>>> AsyncHttpConnection.java:77)
>>>>>> at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(
>>>>>> SelectChannelEndPoint.java:606)
>>>>>> at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(
>>>>>> SelectChannelEndPoint.java:46)
>>>>>> at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(
>>>>>> QueuedThreadPool.java:603)
>>>>>> at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(
>>>>>> QueuedThreadPool.java:538)
>>>>>> at java.lang.Thread.run(Thread.java:744)
>>>>>>
>>>>>> at
>>>>>>
>>>>>>
>>>>>> final NachweiseForm nachweiseform=new NachweiseForm("form",model);
>>>>>> if (!(pars.getPosition("nachweisnr")>=0&&pars.get("
>>>>>> nachweisnr").toLong()>0))
>>>>>> {
>>>>>>
>>>>>> if (pars.getPosition("kundennr")>=0&&pars.get("kundennr").
>>>>>> toLong()>0)
>>>>>> {
>>>>>> here ===> Kunde kunde=kundeManager.get(new
>>>>>> Long(pars.get("kundennr").toString()));
>>>>>>
>>>>>> System.err.println("====================== set Kunde
>>>>>> reached");
>>>>>> nachweiseform.getModelObject().setKunde(kunde);
>>>>>> // nachweiseform.getModelObject().getKunde().addNachweis(
>>>>>> nachweiseform.getModelObject());
>>>>>> }
>>>>>>
>>>>>> }
>>>>>>
>>>>>>
>>>>>>
>>>>>> add(nachweiseform);
>>>>>>
>>>>>>
>>>>>>
>>>>>> public List<Nachweise> getNachweise() {
>>>>>>
>>>>>>> return nachweise;
>>>>>>> }
>>>>>>>
>>>>>>> It seems like both sides of the relationship are set as
>>>>>>> insertable=false,
>>>>>>> updatable = false. This would explain why kunde becomes null after
>>>>>>> saving,
>>>>>>> though it contradicts your statement that everything is saved ok in the
>>>>>>> db.
>>>>>>>
>>>>>>> Either way the AbstractEntityModel has nothing to do with how
>>>>>>> properties
>>>>>>> of
>>>>>>> the model object are stored in the db, so I still believe the problem
>>>>>>> is
>>>>>>> somewhere else in your code.
>>>>>>>
>>>>>>> Marios
>>>>>>>
>>>>>>>
>>>>>>> On Mon, May 5, 2014 at 11:26 AM, Yahoo <hansheinrichbr...@yahoo.de>
>>>>>>> wrote:
>>>>>>>
>>>>>>> First I have to tell you concerning the mapping I used the wrong word
>>>>>>>
>>>>>>>> the
>>>>>>>> dependencies in the mapping are not recursive bur circular.
>>>>>>>>
>>>>>>>> Am 04.05.2014 22:24, schrieb mscoon:
>>>>>>>>
>>>>>>>> I'm not sure I see something wrong in your code, but then again you
>>>>>>>> have
>>>>>>>>
>>>>>>>> omitted a lot of stuff which could be cruicial.
>>>>>>>>> Does nachweiseform have any components that show/update kunde?
>>>>>>>>>
>>>>>>>>> Label nachkundnr=new Label("kunde.id");
>>>>>>>> add(nachkundnr);
>>>>>>>>
>>>>>>>> What exactly do you mean by saying "after save it disappears"? Has
>>>>>>>> it
>>>>>>>> been
>>>>>>>>
>>>>>>>> stored correctly in the database or is it wrong there too?
>>>>>>>>> Everything is stored correctly in the Database only NachKundNr is
>>>>>>>>> NULL
>>>>>>>> Have you tried to create a minimal case where you are setting kunde
>>>>>>>> to an
>>>>>>>>
>>>>>>>> object without having any wicket forms?
>>>>>>>>> I have no problems with kunde in the TestCases
>>>>>>>> What is the value of kunde before saving to the db? If it is
>>>>>>>> correctly set
>>>>>>>>
>>>>>>>> then you likely have a problem with your mapping. If it's not
>>>>>>>>> correctly
>>>>>>>>> set
>>>>>>>>> then something is wrong with your form.
>>>>>>>>>
>>>>>>>>> The problem is only with new Kunde() because Kunde must be preset
>>>>>>>>> and
>>>>>>>> cannot be changed in the Form. Before using AbstractEntityModel I took
>>>>>>>> all
>>>>>>>> Ids of the MANYTOONE relationships in the model and loaded them from
>>>>>>>> the
>>>>>>>> Database and implanted them newly in Kunde before storing. My hope was
>>>>>>>> to
>>>>>>>> avoid this by using AbstractEntityModel.This works for all
>>>>>>>> Dependencies
>>>>>>>> which are set in the Form
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sun, May 4, 2014 at 1:02 PM, Yahoo <hansheinrichbr...@yahoo.de>
>>>>>>>>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> I have a suspicion: I have defened all dependencies with jpa or
>>>>>>>>> hibernate
>>>>>>>>>
>>>>>>>>> annotation.
>>>>>>>>>> So I have also a lot of cicular dependencies, which sometimes make
>>>>>>>>>> problem.
>>>>>>>>>> I will give you 2 examples. one which is OK when I use
>>>>>>>>>> AbstractEntityModel
>>>>>>>>>> and on which makes problem, which is not set in the form through the
>>>>>>>>>> Model
>>>>>>>>>> but before.
>>>>>>>>>>
>>>>>>>>>> 1.
>>>>>>>>>>
>>>>>>>>>> the hibernatemodel:
>>>>>>>>>>
>>>>>>>>>> @IndexedEmbedded
>>>>>>>>>> @ManyToOne(cascade=CascadeType.MERGE,fetch = FetchType.LAZY)
>>>>>>>>>> @JoinColumn(name="NachAngNr",insertable=false, updatable=false)
>>>>>>>>>>
>>>>>>>>>> public Angebot getAngebot(){
>>>>>>>>>> return this.angebot;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> recursive part in Angebot:
>>>>>>>>>>
>>>>>>>>>> @XmlTransient
>>>>>>>>>> @OneToMany(cascade={CascadeType.ALL},fetch=FetchType.LAZY)
>>>>>>>>>> @JoinColumn(name="NachAngNr",nullable=false )
>>>>>>>>>> public List<Nachweise> getNachweise() {
>>>>>>>>>> return nachweise;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> Angebot is set by DropDownChoice in the form
>>>>>>>>>>
>>>>>>>>>> private IModel<List<? extends Angebot>> makeChoicesAngebote
>>>>>>>>>> =
>>>>>>>>>> new
>>>>>>>>>> AbstractReadOnlyModel<List<? extends Angebot>>()
>>>>>>>>>> {
>>>>>>>>>> @Override
>>>>>>>>>> public List<Angebot> getObject()
>>>>>>>>>> { List<Angebot> angebotelist=new
>>>>>>>>>> ArrayList<Angebot>();
>>>>>>>>>> Iterator angeboteiterator=
>>>>>>>>>> angebotManager.getAngebote().iterator();
>>>>>>>>>> while(angeboteiterator.hasNext()){
>>>>>>>>>> Angebot angebot=(Angebot)
>>>>>>>>>> angeboteiterator.next();
>>>>>>>>>> if(angebot.getAngstatus().getId().longValue()==1)
>>>>>>>>>> angebotelist.add(angebot);
>>>>>>>>>> }
>>>>>>>>>> return angebotelist;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> };
>>>>>>>>>> IChoiceRenderer<Angebot> angebotchoicerenderer=
>>>>>>>>>> new IChoiceRenderer<Angebot>() {
>>>>>>>>>>
>>>>>>>>>> public Object getDisplayValue(Angebot angebot)
>>>>>>>>>> {
>>>>>>>>>> return angebot.getId();
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> public String getIdValue(Angebot angebot,int
>>>>>>>>>> index)
>>>>>>>>>> {
>>>>>>>>>> return angebot.getId();
>>>>>>>>>> }
>>>>>>>>>> };
>>>>>>>>>>
>>>>>>>>>> final DropDownChoice<Angebot> angebote = new
>>>>>>>>>> DropDownChoice<Angebot>("
>>>>>>>>>> angebot",
>>>>>>>>>> makeChoicesAngebote,angebotchoicerenderer);
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> The recursive part is treated in NachweiseManagerImpl :
>>>>>>>>>>
>>>>>>>>>> public Nachweise saveNachweise(Nachweise nachweise) throws
>>>>>>>>>> NachweiseExistsException {
>>>>>>>>>>
>>>>>>>>>> try {
>>>>>>>>>> if(nachweise.getId()==null){
>>>>>>>>>> System.err.println("xxxxxxxxxxxxxxxxxx Id=null");
>>>>>>>>>>
>>>>>>>>>> if(nachweise.getMitarbeiter()!=null) {
>>>>>>>>>> }
>>>>>>>>>> ======================= recursive Part for
>>>>>>>>>> Kunde
>>>>>>>>>> later =======================
>>>>>>>>>> /* if(nachweise.getKunde()!=null) {
>>>>>>>>>> System.err.println("xxxxxxxxxxxxxxxxxx
>>>>>>>>>> Kunde");
>>>>>>>>>> (nachweise.getKunde()).addNachweis(nachweise);
>>>>>>>>>> }*/
>>>>>>>>>> if(nachweise.getXtyp()!=null) {
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> if(nachweise.getAngebot()!=null) {
>>>>>>>>>> nachweise.getAngebot().addNachweis(nachweise);
>>>>>>>>>> System.err.println("xxxxxxxxxxxxxxxxxx
>>>>>>>>>> Angebot");
>>>>>>>>>> }
>>>>>>>>>> ======================= recursive Part for Angebot
>>>>>>>>>> =======================
>>>>>>>>>> if(nachweise.getAngebot1()!=null) {
>>>>>>>>>> nachweise.getAngebot1().addNachweis1(nachweise);
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> if(nachweise.getAngebot2()!=null) {
>>>>>>>>>> nachweise.getAngebot2().
>>>>>>>>>> addNachweis2(nachweise);
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> if(nachweise.getObjekt()!=null) {
>>>>>>>>>> nachweise.getObjekt().addNachweise(nachweise);
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> if(nachweise.getPerson()!=null) {
>>>>>>>>>> nachweise.getPerson().addNachweis(nachweise);
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>> return nachweiseDao.saveNachweise(nachweise);
>>>>>>>>>> } catch (DataIntegrityViolationException e) {
>>>>>>>>>> //e.printStackTrace();
>>>>>>>>>> log.warn(e.getMessage());
>>>>>>>>>> throw new NachweiseExistsException("Nachweise '" +
>>>>>>>>>> nachweise.getId() + "' already exists!");
>>>>>>>>>> } catch (JpaSystemException e) { // needed for JPA
>>>>>>>>>> //e.printStackTrace();
>>>>>>>>>> log.warn(e.getMessage());
>>>>>>>>>> throw new NachweiseExistsException("Nachweise '" +
>>>>>>>>>> nachweise.getId() + "' already exists!");
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> Angebot is set by the DropDownChoice Nachweise is first inserted and
>>>>>>>>>> can
>>>>>>>>>> be changed.
>>>>>>>>>>
>>>>>>>>>> 2.
>>>>>>>>>>
>>>>>>>>>> the hibernateModel:
>>>>>>>>>>
>>>>>>>>>> //@XmlTransient
>>>>>>>>>> @ManyToOne(cascade = CascadeType.MERGE,fetch=FetchType.LAZY)
>>>>>>>>>> @JoinColumn(name="NachKundNr",insertable=false, updatable=false)
>>>>>>>>>> public Kunde getKunde(){
>>>>>>>>>> return this.kunde;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> recursive Part for Kunde
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> @XmlTransient
>>>>>>>>>> @OneToMany(cascade={CascadeType.MERGE},fetch=FetchType.LAZY)
>>>>>>>>>> @JoinColumn(name="NachKundNr",insertable=false, updatable=false )
>>>>>>>>>> public List<Nachweise> getNachweise() {
>>>>>>>>>> return nachweise;
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> Kunde ist set is set after before adding the form :
>>>>>>>>>>
>>>>>>>>>> final NachweiseForm nachweiseform=new
>>>>>>>>>> NachweiseForm("form",model);
>>>>>>>>>>
>>>>>>>>>> if (!(pars.getPosition("nachweisnr")>=0&&pars.get("
>>>>>>>>>> nachweisnr").toLong()>0))
>>>>>>>>>> {
>>>>>>>>>>
>>>>>>>>>> if (pars.getPosition("kundennr")>=0&&pars.get("kundennr").
>>>>>>>>>> toLong()>0)
>>>>>>>>>> {
>>>>>>>>>> Kunde kunde=kundeManager.get(new
>>>>>>>>>> Long(pars.get("kundennr").
>>>>>>>>>> toString()));
>>>>>>>>>> System.err.println("====================== set Kunde
>>>>>>>>>> reached");
>>>>>>>>>> nachweiseform.getModelObject().setKunde(kunde);
>>>>>>>>>> ======================= recursive Part for Kunde early set
>>>>>>>>>> =======================
>>>>>>>>>> nachweiseform.getModelObject().getKunde().addNachweis(
>>>>>>>>>> nachweiseform.getModelObject());
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> after opening the form you see the Id of Kunde
>>>>>>>>>> after save it disappears.
>>>>>>>>>>
>>>>>>>>>> add(nachweiseform);
>>>>>>>>>>
>>>>>>>>>> When I set the recursive part later same result
>>>>>>>>>>
>>>>>>>>>> When I try to set the recursive part later I get the same result
>>>>>>>>>>
>>>>>>>>>> Am 04.05.2014 08:55, schrieb mscoon:
>>>>>>>>>>
>>>>>>>>>> Usually this is not a problem. But maybe you are doing something
>>>>>>>>>> different
>>>>>>>>>>
>>>>>>>>>> that the "usual". I think you will need to show us your code to
>>>>>>>>>> help
>>>>>>>>>>
>>>>>>>>>>> you
>>>>>>>>>>> any further.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Sun, May 4, 2014 at 9:12 AM, Yahoo <hansheinrichbr...@yahoo.de>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>> It's the solution for all MANYTOONE-Fields defined in the Form
>>>>>>>>>>>
>>>>>>>>>>> I have a MANYTOONE-Field which is preset and not set in the Form.
>>>>>>>>>>>
>>>>>>>>>>>> This field is not stored.
>>>>>>>>>>>>
>>>>>>>>>>>> Am 02.05.2014 01:24, schrieb mscoon:
>>>>>>>>>>>>
>>>>>>>>>>>> No you don't. The referenced objects will be serialized along
>>>>>>>>>>>> with
>>>>>>>>>>>> the
>>>>>>>>>>>>
>>>>>>>>>>>> entity you are serializing and everything should work just
>>>>>>>>>>>> fine.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>> On Thu, May 1, 2014 at 10:30 PM, Yahoo <
>>>>>>>>>>>>> hansheinrichbr...@yahoo.de
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> Ok,thank you, that's it.
>>>>>>>>>>>>>
>>>>>>>>>>>>> My Entity has a lot of MANYTOONE relationships which are set
>>>>>>>>>>>>>
>>>>>>>>>>>>> byDropDownChoices.
>>>>>>>>>>>>>> In the case of a new entity, do I have to load all these
>>>>>>>>>>>>>> Entities
>>>>>>>>>>>>>> too
>>>>>>>>>>>>>> and
>>>>>>>>>>>>>> to save their ids ?
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Am 01.05.2014 15:01, schrieb mscoon:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Heiner,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> You didn't tell us which dependency injection framework you
>>>>>>>>>>>>>> you
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> using.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> If you're using Spring then simply use the @SpringBean
>>>>>>>>>>>>>>> annotation to
>>>>>>>>>>>>>>> get a
>>>>>>>>>>>>>>> reference to an EntityManager or a Dao.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @SpringBean automatically works only for components so you'll
>>>>>>>>>>>>>>> also
>>>>>>>>>>>>>>> need
>>>>>>>>>>>>>>> to
>>>>>>>>>>>>>>> add a call to injector to your model's constructor.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> public class MyModel implements IModel {
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> @SpringBean
>>>>>>>>>>>>>>> EntityManager entityManager;
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> public MyModel() {
>>>>>>>>>>>>>>> Injector.get().inject(this);
>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ...
>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> This will take care of instantiating all @SpringBean annotated
>>>>>>>>>>>>>>> fields
>>>>>>>>>>>>>>> as
>>>>>>>>>>>>>>> well are handle their serialization/deserialization.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Marios
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Thu, May 1, 2014 at 3:42 PM, Yahoo <
>>>>>>>>>>>>>>> hansheinrichbr...@yahoo.de>
>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I tried the AbstractEntityModel <http://
>>>>>>>>>>>>>>> http://wicketinaction.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> com/2008/09/building-a-smart-entitymodel/> from Igor
>>>>>>>>>>>>>>> Vaynberg
>>>>>>>>>>>>>>> but I
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> didn't get
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> solved the @Dependency annotation from Vaynbergs salve.
>>>>>>>>>>>>>>>> Is there another solution for the Hibernate integration for
>>>>>>>>>>>>>>>> models.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Best regards
>>>>>>>>>>>>>>>> Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>>>>> ------------------------------
>>>>>>>>>>>>>>>> ---------
>>>>>>>>>>>>>>>>
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>>>>>>>>>>>>>>>> apache.org
>>>>>>>>>>>>>>>>
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>>>>>>>>>>>>>> ------------------------------
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>>>>>>>>>>>>
>>>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>>
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