Reference « Update « JPA Q&A

1. Why doesn't my remove() actually remove reference from DB using JPA @Many-to-Many stackoverflow.com

I have a pretty simple JPA @ManyToMany relationship set up in my application. A Product is a part of one or more OrderSystems. Each OrderSystem can have many Products. ...

2. hibernate - persistent of same reference twice bytes.com

Hello, I tried to save an object - (object1) that is contained by 2 different objects (object2 and object3). first, when i saved object2 - it succeeded and the object was ...

3. How to persist objects having circular references using Hibernate coderanch.com

Hello All, I'm trying to run an example where Many events can be held at one single location (Many to One association), which I could run successfully, if this is a unidirectional from Event to Location. But if it needs to be bidirectional, that I should be able to retrieve events for a given location, I'm failing. Please see the below ...

4. persistent of same reference twice forum.hibernate.org

Hello, I tried to save an object - (object1) that is contained by 2 different objects (object2 and object3). first, when i saved object2 - it succeeded and the object was saved (object 2 contains object1) than, i tried to save object3 (that contains also object1 - the same reference) and it cause transient object exception. i also noticed that in ...

5. Many-to-many updating 2nd table removes reference in 1st forum.hibernate.org

Example Table User (fields: name, desc) Table Items (fields: itemname, desc) Table User_Item_Crosswalk = Crosswalk between A and B. In User, I assign instances of Items through the crosswalk table Everything works fine in hibernate. so lets say User1 has Items A, B, and C However, if I change any property of an item (the name or description, it deletes the ...

6. HQL Update and Hibernate Reference forum.hibernate.org

Hibernate version: 3.1.3 This is a more general question about what something in the documentation means (or is supposed to mean, perhaps). The first paragraph of section 13.4 of the Hibernate Reference Manual implies (the way I read it) that if I use HQL instead of SQL that the state of objects in memory will be updated along with the database. ...

7. Unable to save - Self reference forum.hibernate.org

I have a table Telephone Address that has a foreign key to itself (Telephone Address Parent). The foreign key is nullable. I am not able to save a simple Telephone Address entity because of the many to one relationship with the Foreign key. When I comment the same, it works (which is not ideal). Can someone help? Below is the hibernate ...

8. saved reference to object actually creates new one forum.hibernate.org

Hi, I'm running into a little dilemma that may have to do with my understanding of hibernate. I have a class, call it A, that contains a reference to another class, call it B. During the initial run of the application, A and B get instantiated the reference in A is still null (A still does not know B). During a ...

9. how i save the object with reference to other object ? forum.hibernate.org

for example, the user object with two attribute id, name. when we want to save this object to database, we simply create a session and call .save (object_name), but if the object obtain a reference to other object, for example, id, name, address_ref(this is reference to Address object with class type Address), how to persist this object to database !!??

10. Update reference not executed forum.hibernate.org

Hey folks, at first the basics: Hibernate version: 3.3.1.A with hibernate Annotations 3.4.0 GA Code between sessionFactory.openSession() and session.close(): handled by Spring; I'm just calling the dao with personDao.update(personObject); Name and version of the database you are using: PostgreSQL 8.3 so, we have three entities: Person, Address, Country Person is associated to address and address is associated to country - all ...