Comments on: Hibernate annotations: The many-to-many association with composite key http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/ Only empty files are bugless Wed, 21 Dec 2011 15:04:14 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: Marc http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-44838 Marc Wed, 21 Dec 2011 15:04:14 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-44838 Do you have an idea how to map a Hibernate Search @DocumentId in the above solution? Since there isn't really an id field. I tried public class ProductItem { private ProductItemPk pk = new ProductItemPk(); @EmbeddedId private ProductItemPk getPk() { return pk; } [..] @Embeddable public class ProductItemPk implements Serializable { @DocumentId @Transient public Long getProductId(){ return product.getId(); } @DocumentId @Transient public Long getItemId(){ return item.getId(); } Do you have an idea how to map a Hibernate Search @DocumentId in the above solution? Since there isn’t really an id field.

I tried
public class ProductItem {

private ProductItemPk pk = new ProductItemPk();

@EmbeddedId
private ProductItemPk getPk() {
return pk;
}
[..]
@Embeddable
public class ProductItemPk implements Serializable {
@DocumentId
@Transient
public Long getProductId(){
return product.getId();
}

@DocumentId
@Transient
public Long getItemId(){
return item.getId();
}

]]> By: Denys http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-44744 Denys Fri, 16 Dec 2011 21:24:40 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-44744 Hello. Your idea is great on first look. But from hibernate sql logging i see the hibernate hasn't persisted ProductItem entity at all when I've been trying execute new productItemDAO.save(productItem). Thanks in advance for any help. Hello.
Your idea is great on first look. But from hibernate sql logging i see the hibernate hasn’t
persisted ProductItem entity at all when I’ve been trying execute new productItemDAO.save(productItem).
Thanks in advance for any help.

]]> By: Jem http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-40255 Jem Wed, 29 Jun 2011 07:58:51 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-40255 I tried to follow the example but I bumped into this error. Can you please help me? I would greatly appreciate any help. Thank you very much! Exception in thread "main" org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.hp.gdas.capman.domain.Product.productItems[com.hp.gdas.capman.domain.ProductItem] I tried to follow the example but I bumped into this error.
Can you please help me? I would greatly appreciate any help.
Thank you very much!

Exception in thread “main” org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.hp.gdas.capman.domain.Product.productItems[com.hp.gdas.capman.domain.ProductItem]

]]> By: Generic1 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38977 Generic1 Wed, 20 Apr 2011 07:36:27 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38977 Hi again, I have uploaded a small example which represents my problem. Maybe you can have a look at my example. Thanks a lot and all the best Generic1 http://www.file-upload.net/download-3372677/SpringHibernate.zip.html Hi again,

I have uploaded a small example which represents my problem.
Maybe you can have a look at my example.
Thanks a lot and all the best
Generic1

http://www.file-upload.net/download-3372677/SpringHibernate.zip.html

]]> By: Generic1 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38965 Generic1 Tue, 19 Apr 2011 21:26:28 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38965 Hi, I'am also very glad because of this tutorial but I have some problems to implement it. I always get the Exception "Column 'item_id' cannot be null" Does anyone know what I'am doing wong? Thanks a lot, All the best, Generic1 Hi,

I’am also very glad because of this tutorial but I have some problems to implement it. I always get the Exception “Column ‘item_id’ cannot be null”
Does anyone know what I’am doing wong?
Thanks a lot,
All the best,
Generic1

]]> By: Stefan135 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38741 Stefan135 Thu, 07 Apr 2011 14:54:12 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38741 Last Update for today: I added @Column(nullable=false) after both @ManyToOne Annotations in the ProductListPk class. Now the table is being created, but both columns are varchar and not Integer. Now I get the error: SQL0538 SQLCODE -538 SQLSTATE 42830 Explanation: Foreign key attributes do not match parent key. Where is my problem? Last Update for today:
I added @Column(nullable=false) after both @ManyToOne Annotations in the ProductListPk class. Now the table is being created, but both columns are varchar and not Integer. Now I get the error:
SQL0538 SQLCODE -538 SQLSTATE 42830
Explanation: Foreign key attributes do not match parent key.

Where is my problem?

]]> By: Stefan135 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38738 Stefan135 Thu, 07 Apr 2011 14:00:08 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38738 Sorry, covered by @Column(name = "item_id", nullable = false) and @Column(name = "product_id", nullable = false) Sorry, covered by @Column(name = “item_id”, nullable = false) and @Column(name = “product_id”, nullable = false)

]]> By: Stefan135 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38737 Stefan135 Thu, 07 Apr 2011 13:57:44 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38737 Okay, now that I got SLF4J to run I know, that DB2 returns an error, that there is a problem with a possibly nullable primary key: INFO: Running hbm2ddl schema export 07.04.2011 15:54:18 org.hibernate.tool.hbm2ddl.SchemaExport execute INFO: exporting generated schema to database 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: Unsuccessful: create table product_item (item_id integer, product_id integer, primary key (item_id, product_id)) 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: DB2 SQL Error: SQLCODE=-542, SQLSTATE=42831, SQLERRMC=ITEM_ID, DRIVER=4.9.78 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: Unsuccessful: alter table product_item add constraint FK3C742463F24F48C9 foreign key (item_id) references item 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=DB2ADMIN.PRODUCT_ITEM, DRIVER=4.9.78 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: Unsuccessful: alter table product_item add constraint FK3C742463253F490B foreign key (product_id) references product 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create FATAL: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=DB2ADMIN.PRODUCT_ITEM, DRIVER=4.9.78 07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport execute I expected, that this is covered by the @OneToMany Annotation, where nullable=false is set. Any idea? Thanks! Okay, now that I got SLF4J to run I know, that DB2 returns an error, that there is a problem with a possibly nullable primary key:

INFO: Running hbm2ddl schema export
07.04.2011 15:54:18 org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: exporting generated schema to database
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: Unsuccessful: create table product_item (item_id integer, product_id integer, primary key (item_id, product_id))
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: DB2 SQL Error: SQLCODE=-542, SQLSTATE=42831, SQLERRMC=ITEM_ID, DRIVER=4.9.78
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: Unsuccessful: alter table product_item add constraint FK3C742463F24F48C9 foreign key (item_id) references item
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=DB2ADMIN.PRODUCT_ITEM, DRIVER=4.9.78
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: Unsuccessful: alter table product_item add constraint FK3C742463253F490B foreign key (product_id) references product
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport create
FATAL: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=DB2ADMIN.PRODUCT_ITEM, DRIVER=4.9.78
07.04.2011 15:54:19 org.hibernate.tool.hbm2ddl.SchemaExport execute

I expected, that this is covered by the @OneToMany Annotation, where nullable=false is set.

Any idea? Thanks!

]]> By: Stefan135 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38736 Stefan135 Thu, 07 Apr 2011 13:27:27 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38736 Has anybody an idea, why the product_item table is not being created by Hibernate? In my first attempt I had some typos, so I decided to copy&paste the whole stuff. However I had to add "implements Serializable" to the item, product and productItem class. Otherwise I got an error in the ProductItemPk class, that Product is not a basic type. I am using DB2 and Hibernate 3.62 with Netbeans. The project runs, also inserts my four items and my two products. But I don't see the association table. Please help! Thanks! Has anybody an idea, why the product_item table is not being created by Hibernate? In my first attempt I had some typos, so I decided to copy&paste the whole stuff. However I had to add “implements Serializable” to the item, product and productItem class. Otherwise I got an error in the ProductItemPk class, that Product is not a basic type.

I am using DB2 and Hibernate 3.62 with Netbeans. The project runs, also inserts my four items and my two products. But I don’t see the association table. Please help!
Thanks!

]]> By: roboto http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/comment-page-2/#comment-38534 roboto Sun, 27 Mar 2011 18:20:47 +0000 http://boris.kirzner.info/blog/archives/2008/07/19/hibernate-annotations-the-many-to-many-association-with-composite-key/#comment-38534 Also is how to instantiate ProductItem object? Also is how to instantiate ProductItem object?

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