delete « Association « JPA Q&A

1. Hibernate: delete many-to-many association stackoverflow.com

I have two tables with the many-to-many association. — DB fragment: loads
Id
Name sessions
Id
Date sessionsloads
LoadId
SessionId — Hibernate mapping fragments:

/* loads.hbm.xml */
<set name="sessions" table="sessionsloads" inverse="true">
    <key column="LoadId" />
    <many-to-many column="SessionId" ...

2. How to delete all associations in a Hibernate JoinTable at once? stackoverflow.com

We have the following two entities with many-to-many association:

@Entity
public class Role {
  ...
  @ManyToMany
  @JoinTable( name = "user_has_role", joinColumns = { @JoinColumn( name = "role_fk" ) }, ...

3. hibernate association delete coderanch.com

HI, i have two tables 1.dept and 2. emp i am using 1-many association to retrieve the data. assume hql: select * from dept where deptno=10; when i run this hql query assume: i am getting 1 row of dept data and associated 5 rows of emp data. Now i am removing 2 rows from emp list.And assigning the emp list ...

4. many-to-many association, and deleting an association forum.hibernate.org

I have an entity user which has a many-to-many association with itself a User is a tenant to a List a User is a Renter to a List I load a Renter, and I initialize its List Then at some point he wants to remove oneself from the Tenant, so I have this function: public void removeOneselfFromTenant(User tenant, User oneself) { ...

5. Cannot delete 1:n association forum.hibernate.org

Newbie Joined: Thu Jul 15, 2010 5:06 am Posts: 7 Hello! I have a problem with deleting an 1:n association. I have two objects which have a bidirectional 1:n association. Now I want to delete this association without deleting the objects. However this is not working. I want to delete the association between the dashboard and one medical document object. These ...

6. Delete items of many-to-many associations forum.hibernate.org

Hello, I have read the docs,faqs and more and still can't figure it out. I'm using Hibernate 2.1 with mySQL 4. My object model is using many-to-many associations for holding lists of objects. Part of my mapping files is as follows: A RuleBO class holds a list of actions. The list class is ActionListBO and the action class is ActionBO. I ...

7. Quickly deleting all associations forum.hibernate.org

Hi all... I have a strange business case I was hoping to get some advice on. I have modeled a many-to-many (with the association being a composite object.. A -> AB -> B), and we have one use case where we need to wipe out all the associations. These tables can be quite large... so I want to avoid having to ...

8. clearing an association upon a delete forum.hibernate.org

Hi, I have 5 or 6 tables all with created by/updated by associations to my table of users. When I delete a user, I'd like to replace all these associations with "null". In other words, if the Product(mapping below) has a many-to-one relationship with User, when the User record is deleted I'd like the Product.created_user and Product.updated_user fields to become null. ...

9. Retrieving many-to-many association deletes association forum.hibernate.org

Author Message si100 Post subject: Retrieving many-to-many association deletes association Posted: Thu Mar 03, 2005 9:49 pm Newbie Joined: Thu Mar 03, 2005 8:59 pm Posts: 2 Hi, I have discovered that when I have a many-to-many association that there are circumstances where association is deleted when hibernate gets the collection. For example I have a Car object that ...

10. Deleting associations related by forum.hibernate.org

Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: 3.0.5 Mapping documents: Code: ...

11. many-to-many Association being deleted forum.hibernate.org

Hi I have two tables user and role and an intermediate table user_role. Here is my user.hbm.xml ...

12. Trouble w. many-to-many association and on-delete="casc forum.hibernate.org

I use a biderectional many-to-many association and for the key i have set on-delete="cascade" on both ends. What i expect is that the generated schema contains on delete cascade foreign key definitions for both ends but this is missing for the invers end. I want to get the behaviour that when an object of the invers end is deleted the associations ...

13. Delete many to many association forum.hibernate.org

14. deleting many-to-many association ??? forum.hibernate.org

OK so here is the problem: I have a many to many association between ProjectProfile and DeveloperProfile.... I am aware that there are allot of posts regarding many-to-many associations but I can't seem to find the answer to a simple question: how can I delete just the association between a project and a developer(in my case) thank you Hibernate version: 3.1.2 ...

15. delete DML operations on n to m associations forum.hibernate.org

16. How to automatically delete orphaned many-to-one association forum.hibernate.org

Hibernate 3.2.5 MySQL 5.0 I have a class which has a DocumentReference, as per above mapping snippet. Two classes actually have the above mapping since two classes have a DocumentReference. Everything works correctly, except that when my object has a valid documentReference, and that I 'setDocumentReference(null)', the DOCUMENT_REFERENCE_ID column becomes null (as expected), but ...

17. Many-To-Many: Deletion of association forum.hibernate.org

18. many-to-many association and delete forum.hibernate.org

I have many to many association and when I delete a referenced element, hibernate silently remove it and his reference. I'd like to prevent this situation from happening : an object should not be deleted if referenced by others. I checked hibernate documentation, but I did not see how to achieve this...

19. Deleting Many-To-Many Join Table associations forum.hibernate.org

I have two objects which are related through a many to many relationship, User and Group. I'm trying to delete the User from the database. This is really easy to do if there is only one User in the Group's users list, I can simply delete the group object from the database. However, if there are more than one user in ...

20. One-to-Many association delete forum.hibernate.org

Hi, I have a Parent child relationship between two entities. I have cascade = all JPA property between these two entities. I am doing parent.getChildren().add(child) to add children to the parent class and saving the parent entity which works great. But, when i do parent.getChildren().remove(child) and save the parent the child record is not removed. What should i do to remove ...