primary key « Association « JPA Q&A





2. Primary key association    forum.hibernate.org

andresbube Post subject: Posted: Mon Jan 19, 2004 12:16 pm Newbie Joined: Wed Jan 07, 2004 7:59 pm Posts: 11 Location: Medellon, Colombia I'm sorry for the lenghtly post, but I think i would clear things up I'm using a foreign id generator but I'm experiencing problems. I'm getting the following exception: could not instantiate id generator. Here's my ...

4. ternary association and case sensitivity of the primary key    forum.hibernate.org

a really weird problem with a ternary setup. My database runs case insensitive queries. Now, if I try to load a group (a.k.a. a role) by a name with casing different than that specified in the database two things happen: 1) the user set does not contain any items (even though the query return the proper number of user records; 3 ...

5. One-to-one association using a primary key    forum.hibernate.org

In the one-to-one association using a primary key association example on page 223 of "Hibernate In Action", the one between user and address, how do I get the address to be deleted? Let's say I create a user, give it an address and call save. Hibernate inserts the user into the user table and the address into the address table. Now, ...

6. one-to-one primary key association example    forum.hibernate.org

7. help with one-to-one primary key association    forum.hibernate.org

I'm working with the "Hibernate In Action" book and Hibernate3. I have an existing database with two tables as follows: Table SCAN_RESULT Primary Key EXP_NAME (varchar2) Column LOT_NUMBER (varchar2) Table SCAN_QC Primary Key EXP_NAME (varchar2) ** Column PASS_FAIL (varchar2) Column COMMENTS (varchar2) ** Foreign key constraint to SCAN_RESULT.EXP_NAME I modeled this with the following two mapping files ScanResult.hbm.xml

8. one-to-many association not through the primary key    forum.hibernate.org

I have the following problem: I have an "extension" table that's used to keep extra text information for various objects in the system. It looks like this (Oracle syntax): create table extra_info ( id number, seq number, text varchar2(1000) ) If I want to support extra text information for an object, I just add an extra_info_id in that table, which references ...

9. primary key in ternary association    forum.hibernate.org

Hibernate version: 3.2.2.ga Name and version of the database you are using: MySQL 5.1 Hi All, I am using the technique described on page 308 of "Java Persistence with Hibernate" to create a ternary association. That is, I have created an @Embeddable class with two @ManyToOne associations: Code: @Embeddable public class UserGroupPermission { ...





10. Many to many association using non-primary key columns    forum.hibernate.org

Hi guys, I have two tables -- INSTALL_BUILD_RESULTS and BUILD_RESULTS. IBR has a unique column (non-primary key) called Install_Build_Id and BR has a unique column (non-primary key again) called Build_Id. Both are varchars. A third table, LINK_BUILD_TO_INSTALL_BUILD is a table simply consisting of the two columns mentioned above, used together as a composite key. my XMLs for the classes -- BuildResult.hbm.xml ...

11. associations with foreign primary keys    forum.hibernate.org

12. One-to-One association with shared primary key    forum.hibernate.org

i'm doing OneToOne association with shared primary key Employee<--->Address (bidirectional) I'm using Ms SQLServer 2005 Employee : EMP_ID(pK) Address : ADDRESS_ID(pFK references EMP_ID of Employee) I'm using hibernate with annotations. Employee class : @Entity @Table(name = "EMPLOYEE") public class Employee { @GenericGenerator(name = "assigned",strategy = "assigned") @Id @GeneratedValue(generator = "assigned") @Column(name = "EMP_ID") private Integer empiId; @Column(name = "NAME") private String ...