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
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<[email protected]> 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<[email protected]>
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<[email protected]>
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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