Hi!

I've some trouble with a OneToOne mapping. It's just like:



Pretty much the same like the Heart/Body example from the hibernate documentation. Now if I try to persist a VoucherOrder with an OrderSupplement set, I get this ids need to set manually error.

In Google's cache (hibernate manually primarykeyjoincolumn), I found an appropriate remark for version 3.1 beta 4, which is no longer stated. Seems like Hibernate doesn't realize that the ID should be taken from the voucherorder.

It seems to me that this is a rather common situation, so does anybody have an idea how I can let Hibernate handle this? Sure, I may save the order first and afterwards set the supplement, but I don't like that...

Sebastian


Hibernate version:
Hibernate Annotations Version: 3.1beta9

Code between sessionFactory.openSession() and session.close():
OrderSupplement oS = new OrderSupplement();
oS.setText("Blabla");
VoucherOrder v = new VoucherOrder();
v.setAmount(new BigDecimal("12.34"));
v.setCurrency("EUR");
v.setDetails(oS);
session.save(v);

Full stack trace of any exception that occurs:
Exception in thread "main" org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): net.paybox.voucher.oi.OrderSupplement
at org.hibernate.id.Assigned.generate(Assigned.java:33)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:98)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:98)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:506)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:498)
at org.hibernate.engine.CascadingAction$1.cascade(CascadingAction.java:134)
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:213)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:157)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108)
at org.hibernate.engine.Cascade.cascade(Cascade.java:248)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:437)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:326)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:180)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:534)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:522)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
at net.paybox.voucher.oi.TestVouchers.testCreate(TestVouchers.java:38)
at net.paybox.voucher.oi.TestVouchers.main(TestVouchers.java:18)
Name and version of the database you are using:
HSQLDB 1.8.0
The generated SQL (show_sql=true):
%
Debug level Hibernate log excerpt:
%

in order supplement use a @GenericGenerator(strategy="foreign", parameters...)

Hi,
I would like to specify my own custom class for Identifier generation. I am using the @GenericGenerator and have specified the following in my code:

@Id
@GenericGenerator(name="blah",strategy="com.company.myFullyQualifedClass")
@Column(name="player_Id") private String id;

public String getId() {
return this.id;
}

This is the stackTrace obtained:

org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): Players
at org.hibernate.id.Assigned.generate(Assigned.java:33)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId
(AbstractSaveEventListener.java:91)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGene
ratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrR
equestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTran
sient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(
DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdae(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:559)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:547)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:543)
at Client.main(Client.java:37)


As a matter of fact I get this same error even when I specify any built in strategy like increment. Can someone point to me what I am doing wrong. I am using hibernate-annotations-3.1beta8.

Thanks,
Priya

Hi Priya!

Sorry I cannot help you. I still have the same problem, this custom strategy didn't work out for me either.
In my situation, I handle the insert by manually doing this:
* store the Order
* copy the order's ID to the supplement
* store the supplement
This is not what I expected from Hibernate, but it works...

Cheers,
Sebastian

Hi Sebastian,

Thanks for your response. I would like to use the custom generation feature as this is one of great features provided by the hibernate core. Even if the annotations dont work I would like to know how I can contribute to fix this. Can someone point to me where to start? I looked into the GenericGenerator interface... and I am not sure which all classes implement this for the built in strategy like increment,native, etc. Should I write my own class which implements the GenericGenerator interface? The API doc for GenericGenerator says "No usage of org.hibernate.annotations.GenericGenerator" and I am not sure what I need to do. If I can fix this I will gladly contribute to the community...
Any information is appreciated.

Thanks,
Priya

I tried the following and it works

@Id @GeneratedValue(generator="system-uuid")
@GenericGenerator(name="system-uuid", strategy="customGUIDGenerator")

@Column(name="player_Id")
private String id;
public String getId() {
return this.id;
}


With this I can specify my own GUIDGenerator.

Thanks,
Priya

So is the documentation with the body -- heart example incorrect then since is suggests one can have a unidirectional one-to-one relation with a shared common key, or is this discussion way over my head (not an uncommon phenomenon)????

no the example in the doc is fine, but you have do set the id value yourself