ID « Field « JPA Q&A

1. Do you think it is necessary to mark id fields with insertable = false and updatable = false? stackoverflow.com

Do you think it is necessary to mark id fields with insertable = false and updatable = false ? I haven't seem much people doing this before, but today I checked one ...

2. Hibernate: Example.create not working when the id field of my object is populated stackoverflow.com

I'm using Hibernate 3.3.4.GA. I use this to make queries given a partially populated object …

    final Session session = sessionFactory.openSession();
    final Criteria crit ...

3. How to set up @Id field properly when database table is already populated JPA stackoverflow.com

I am having a single table in my database and I have added the @Id attribute over the field. As strategy I use GenerationType.IDENTITY. This works fine WHEN the database table ...

4. Hibernate - field not found: id coderanch.com

Hmm - I use Hibernate 3.1.2, XDoclet2, and Ant 1.6.5 I have configured my own tasks for generating and validating .hbm.xml files:

5. [JPA] Can I mark two fields with @Id annotation coderanch.com

Usually when you have that model, you create a class that will store both properties and this will act as a Id Class, then you have your @Id on one property in the mapped class so public class MyPK{ private Long someNumber; private String someOtherField; } @Entity public class AMappedClass{ @Id private MyPK myId; } Or is it @EmbeddedId? I can't ...

6. MappedBy on field both id/foreign forum.hibernate.org

Hi, I have three tables: units, units_authorities and authorities. The last one is irrelevant; units is a join table, so it has foreign keys for both units and authorities. It cointans additional columns. Now what I want to do is to create a collection of units_authorities in units. I have tried the code below: Code: import java.util.List; import javax.persistence.Entity; import javax.persistence.FetchType; ...

7. I get a ? mark in my ID field? forum.hibernate.org

Ok, just persisted my first class today using hibernate by deploying Hibernate as a JBoss service using a MySQL DB. I must say it is so sweet and I think I will replace my CMPs with hibernate in the future. However, I ran into this newbe problem: I have a class with an ID field using the uuid.string generator and my ...

8. hibernate changing id fields with postgres forum.hibernate.org

Hi all, Can anyone tell me why hibernate seems to change id's of records retrieved from database ? When I type the following query: select f.forum_id as forum_id0_, f.name as name0_ from Forum as f i have two records both of which are returned, but id numbers 1 and 2 are both changed into 0. Why ? When I type the ...

9. Multiple id fields forum.hibernate.org

I had a query, but this always return de same data. I do think that it is because in the seriesanio.hbm.xml file I defined a field ID. In fact the id of the table are three fields,. How can i define the three flields as ID??? This is my code: but the id ...

10. Generate value for a non-id field forum.hibernate.org

11. How to use id as the part of other fields? forum.hibernate.org

Hi, table employee (id int, departmentno int, employeeno varchar) id is automatically generated by the DB server, I want employeeno consists of department no and id, i.e. id 123 departmentno 777 the employeeno supposed is 777123 when I add new employee, and before I write the data into table, how can I generate the employeeno? I am using Hibernate 3.0, struts ...

12. Query By Example not working with "id" field/prima forum.hibernate.org

I'm running Hibernate version 3 on MySql 4. I have just begun using Query By Example and my initial programs were working fine. I ran into a problem when I tried to use an org.hibernate.critereon.Example constrained by my table's "id" field, which is the primary key of the table and is set as the "id" in my hibernate.cfg.xml. I found that ...

13. PROBLEM: Proxy with assigned ids and field access broken forum.hibernate.org

Hibernate version: tried with 3.1.3 and 3.2.4.sp1 Name and version of the database you are using: Derby 10.2.2.0 I am using field access for all my properties (access="field"). I am using an assigned value for my identifier (access="field"). Here's what I discovered: 1) My pojo class has been enhanced to include a CGLIBLazyInitializer. No problem. 2) Normal getters/setters have been modified ...

14. Many-to-many over non id field forum.hibernate.org

Hello! I would like to make a many-to-many relation but one of the table is not connected with the id field. I have 3 tables: Table: FOO PK: ID ANOTHER_ID Table: BAR PK: ID Table: FOOBAR FOO_ID BAR_ID My problem is that FOO:ANOTHER_ID = FOOBAR:FOO_ID. So this mapping does not work: ...