composite « HBM « JPA Q&A





1. Generating Hibernate composite key object from hbm file    stackoverflow.com

(Parenthetical rant:) I'm a Hibernate beginner getting slightly frustrated by the overhead of a simple join that I could write in 15 seconds in SQL. (End rant) The situation is thus: I ...

2. How can I map "insert='false' update='false'" on a composite-id key-property which is also used in a one-to-many FK?    stackoverflow.com

I am working on a legacy code base with an existing DB schema. The existing code uses SQL and PL/SQL to execute queries on the DB. We have been tasked with ...

3. Hibernate HBM2DDL produces nullable field for primary foreign key?    stackoverflow.com

I'm using hbm2ddl (from the hibernate3-maven-plugin 2.2) to produce a DDL based on my JPA annotated entities. Normally, this works fine but I recently introduced an entity that uses a composite ...

4. How to use 2 composite-id in hbm.xml    forum.hibernate.org

Could you pls tell, is it possible to use 2 composite-id in a single mapping like the following code snippet. If it's wrong how to use 2 referance variable in a single hbm. ----------------------------------------------------------------------- Table Name: employee coulmn : empNo,Name,Address. constrain(empNo,Name) class A { private B obj1; private C obj2; private String address; get/set(); } class B { private int emp_no; ...

5. hbm2java issues when specifying composite-id in mapping    forum.hibernate.org

Newbie Joined: Wed Sep 14, 2011 8:55 am Posts: 2 The following hibernate-mapping file fails to produce (a) the specified composite-id class "MatrixCsvCPK" and (b) does not include the "csv" attribute (and its getter/setter methods) in the generated class file "MatrixCsvBase". Code: ...

6. One-to-one problem with hbm2ddl using composite id    forum.hibernate.org

Hi All, I've been driving myself crazy trying to get a one-to-one bi-directional association working but cannot get hbm2ddl to generate. After going through all sorts of hoops to do with incorrect column numbers I have become stuck with the following error when running hbm2ddl: "Schema text failed: Could not determine type for column ContractNumber of type org.hibernate.type.SerializableType: java.lang.ArrayIndexOutOfBoundsException" The two ...

7. minor bug in for hbm2java    forum.hibernate.org

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8. composite-id & hbm2java    forum.hibernate.org

I have been trying to convert my POJO's from single column primary keys (which compiles fine with hbm2java) to composite keys. Now when I try and create the POJO from the mapping I get a ClassDefNotFoundException. The name of the hbm file and the POJO are different (I did this because I was getting exceptions due to different packages, and it ...

9. How to define composite key in hbm files?    forum.hibernate.org

Hi Friends, I have one table called ProjectUser in which one project can b assigned to several users.Now there is a composite key ProjectId+User so how to define it in mapping file throug id.I think in id tag v can define only one column so how to define the composite key in id tag.All suggestions are welcome. Thanx in advance, Chirag. ...





10. How to delcare a column which is a composite key under hbm    forum.hibernate.org

Hi, I am facing a problem at runtime . I have a column say Docu_ID from master table . This Column I would like to declare another hbm.xml file. but at runtime I am getting : THIS_. Docu_Id is not identifier. After investigating I found that DOcu_ID in master.hbm.xml is declared under masterPk . ex: