object « Table « JPA Q&A

1. Hibernate two tables and one object stackoverflow.com

I have this situtation:

Table1: 
tab_id
field11
field12


Table2
id
tab_id
field21
field22

I have to create one object on this two tables for example:

object: 

@Id
tabId

@Colummn(name="field11")
field11

@Colummn(name="field12")
field12

@Colummn(name="field21")
field21

When i update field21 table2 should update this field, but table1 doesn't have ...

2. Object comprised of mulitiple tables forum.hibernate.org

I'm just getting started with hibernate and am looking for an example of using hibernate to model columns from 3 different tables. For example here is my bean. The fields value, testName, and pwyUrl reside in seperate tables. Does some one have an example of how to use hibernate to read across multiple tables to model an object? It doesn't matter ...

3. One object from two different tables forum.hibernate.org

Is there any way to map one object to two different tables? I have an object that has a boolean flag which basically indicates which database table the data came from. I have two standard SQL queries that generate the same information, but from separate tables (one contains verified data, one contains as yet un-verified data). I could refactor the DB ...

4. Do you need one object per table? forum.hibernate.org

5. Moving objects between different tables forum.hibernate.org

For a road traffic information management application we need to retain created objects for archiving purposes, therefore we have 'active' objects and 'archived' objects, only distingued by a flag. The object graph is quite complex. Is there a method to move archived objects (for performance reasons) from one sets of tables to another one without creating a fake class hierarchy? Thanks ...

6. Can Hibernate support object table? forum.hibernate.org

In Oracle, I define a Person table which has an address object(not a column). Address is defined as an ojbect(DDL: create or replace type address as object(city, street, state, zip)). Normal DML would like "insert into Person values('Tom', '4-10-06', address('Redwood', '1 Lakeway Dr', 'Ca', '12345'))". My question is Hibernate is a right solution in this scenario? If so, how can the ...

7. Get object propertiy from other table forum.hibernate.org

I have the followin db schema: Table Person: - person_id: int - name: string - ... Table fingerprint - fingerprint_id: int - person_id: int - fingerprint_data: string ----------------------------------------------------------------------------- And these are the class definitions: public class Person { private int person_id; private String name; ... private Fingerprint fingerprint; } public class Fingerprint { private int fingerprint_id; private Person person; private String ...

8. How to navigate to other objects from the same table? forum.hibernate.org

9. Two tables, one object forum.hibernate.org

Hi, Due to integration with an existing datamodel and databse I need to map two tables into one object. For example, a vehicle has a make, model and a colour, these are represented by lookup tables, referenced by primary key from the vehicle table. I can easily map this using a one to one from vehicle, but the vehicle class already ...

10. when will hibernate return a proxy not a real table object forum.hibernate.org

11. many-to-many between 2 objects but using 2 relational tables forum.hibernate.org

I have a somewhat complicated tree node structure that i'm trying to use hibernate for. I have 2 objects, a TreeNode and a TreeNodeGroup, and a table for each. TreeNodes are pretty much what you expect, however, their children are not TreeNodes but TreeNodeGroups. Each TreeNode has 0..M TreeNodeGroups, and each TreeNodeGroup has 0..M TreeNodes. The reason for doing this is ...

12. Translatable Objects (Table duplication) forum.hibernate.org

Hi, I need to make every mapped class in my application translatable. I got a proposal to create a duplicate table and create a OneToMany relation from the main object to the translated records. (f.e. User -> User_en, User_nl, ...) I think it's quite a waste of time to create a subclass for every language. Is there any way I can ...

13. Business Objects vs. DB-Tables forum.hibernate.org

Hi, I was just wondering how I could manage storing Business Objects. I have a normalized Data modell. The data of a business Objects are distributed over many tables. To read a Business Objects I use Views. But what can I do, if I want to add a new object to my database? Do I need to save table wise in ...

14. Two tables into one object (without SecondaryTable) forum.hibernate.org

We have a database where the PK is really a worthless field (basically it's an Identity column) This creates a SecondaryTable problem, as an identity column to another table has no meaning to another table (with it's own identity). We have indexes that pretty much cover a PK situation. There are complicated reasons why this works better, so no complains on ...

15. One table, more objects forum.hibernate.org

I am working on a legacy application, where a certain object-table mapping schema was chosen. I would like to migrate to another schema ( same table(s), different class(es) ), but would like to do this in phases, so that for some time, both schemas will exist concurrently. Can anyone advise me on how to handle this transition elegantly? Thanks

16. How to get getResultList() to return a table object forum.hibernate.org

Hi, I'm going to ask newbie questions so bear with me pls :) I'm using JPA, Hibernate and DAO. I have the following classes 1) Car - database model 2) CarDAO - interface to CarDAOImpl 3) CarDAOImpl - All the SQL resides in here I have the following method in my CarDAOImpl Code: @Transactional(propagation = Propagation.MANDATORY) public ...