FK « Composite « JPA Q&A

1. Hibernate: How can I set an object to be in a composite key and in the same time to be a FK?

I have:

public class CompoundKey implements{
  private Long userId;
  private Long bankId;
public class Fracture {
  Long bankId;
  Long userId; 
  String bone;

  public ...

2. JPA - Using composite PK's and FK's and defining relationships

I got these 2 entities:

public class Book {
    private BookPK id;

    private String title;

    @javax.persistence.ManyToOne(fetch = javax.persistence.FetchType.LAZY)

3. JPA Composite PK with FK problem

Hello everyone, I am having trouble setting up an simple JPA mapping. I have a first class defined like this : @Entity @Table(name="a") public class A{ @Id @Column (nullable=false, name="BP_ID") @GeneratedValue(strategy=GenerationType.AUTO) private int id; @Basic private String name; //Getters + Setters... } The second one where A is a member of B @Entity @IdClass(BK.class) @Table(name="b") public class B { @Id @Column ...

5. Composite primary Key using FK refrences

I have a table that has composite primary key, these two colums are FK references. Table A [ A_id PK Desc ] Table B [ B_Id PK Desc ] Table A_B_Pemissiom [ A_id (FK table A) B_Id (FK table B) PrimaryKey ( A_id,B_Id ) ] Can any one help me in writing the POJOS using annoations for this case.

6. Bizzare MappingException Using Composite PK/FK

I'm getting a mapping exception immediately after launching my Hibernate application that says a "foreign key must have same number of columns as the referenced primary key", even though I've included the same exact composite columns as part of my FK definition in my hbm.xml files. The exact exception reads: Code: Initial SessionFactory creation Foreign key (FK7CCFB11A0FF9A08:sgattributepairs [SgCode])) must have ...

8. How to FK part of a composite-id PK

Hi, I've got a legacy database to deal with, and I'm almost getting crazy trying to make it work with Hibernate. Let's say that there are 'n' Bs for each S, in a 1->n relationship. In B, the FK (defined by tnumso field is also part of a composite-id PK. Table S's PK mapping is like this:

9. one-to-many with FK in composite-Id

Beginner Joined: Fri Jan 16, 2004 11:05 am Posts: 33 I have a situation with 2 tables where I want to retrieve a collection from a table that holds a FK as part of its PK. The tables look something like the following. SecAccs unqe_key - PK ( other columns .. ) SecRcntPswd accs_unqe_key - PK,FK last_authtmst - PK pswd - ...

10. composite-id with fk as pk

Hibernate version: 2.1.4 Mapping documents: Sector .... Prestamo .... Amortizacion ...

11. [Beginner] Help with insert PK/FK/Composite ID

Newbie Joined: Mon Oct 18, 2004 11:27 am Posts: 4 Hibernate version: 2.1.6 (I think, I'm using latest MyEclipse) Mapping documents: Component.hbm.xml: Code: ...

12. single FK to composite PK

In my database, I have a "code/decode" table that is used to store key value pair information. The primary key is made up of two columns: TYPE and CODE. I then have multiple associated tables that contain only the CODE as the foreign key. The TYPE is well known and constant for all associations (i.e. a status TYPE or a person ...

13. Difficulty mapping fk for collection using composite-id

Mapping documents:

15. Composite Keys (Two columns, one of which is a FK)

. . Other properties.... . ...

16. FK part of a composite PK

@Embeddable public class IdLangIdPK implements Serializable { private Long id; @Column(name = "lang_id") private Long langId; @OneToOne(cascade = CascadeType.ALL, optional = false) @JoinColumn(name = "lang_id" insertable = false, updatable = false) private Language lang; ... }

17. problems with FK and composite key

18. Pb mapping FK part of a composite id

Hibernate version: 3.2.4 Name and version of the database you are using:Oracle 10 The generated SQL (show_sql=true): I have a foreign key that is a part of a primary key. This work fine in xml mapping, but i can't find a solution with Hibernate Annotations. This is an exemple with hbm.xml files Mapping documents: Code: ...

19. Composite primary key + fk

Got a database legacy and I through following problem? Got a database legacy and I through following problem? I own a key composed and one of attributes this key composed also is a FK. Got a database legacy and I through following problem? I own a key composed and one of attributes this key composed also is a FK. not happens ...