Re: [Hibernate] problems with cascade

[Massip, E. <Eti...@sa...>]

Did you try to set cascade to the value I mentioned in my previous post =
? The project entry should not be deleted, if that's what you meant.

________________________________

De : Ingo Villnow [mailto:ing...@go...]=20
Envoy=E9 : mercredi 21 novembre 2007 11:20
=C0 : Massip, Etienne
Objet : Re: [Hibernate] problems with cascade


If I delete the entry in the project-table than the childs will be =
deleted, to.. that's all fine. But i only want to delete the children, =
without deleting the parent entry, for example =
"project.getManagers().clear() - The problem is that it would be hard to =
find all manager-elements by projectid and to delete them one by =
another. Is there an easier way?=20

thanks


2007/11/21, Massip, Etienne <Eti...@sa...>:=20

	No a hibernate member, but maybe cascade=3D"all, delete-orphan" could =
do the trick ?

________________________________

	De : hib...@li... =
[mailto:hib...@li...] De la part de =
Ingo Villnow
	Envoy=E9 : mercredi 21 novembre 2007 11:05
	=C0 : hib...@li...
	Objet : [Hibernate] problems with cascade
=09
=09
=09
	Hello,
=09
	i have the following problem. i have a table "projects" and a table =
"managers" with a i think called "1:N" relationship.
=09
	My mapping file (partly):
=09
	<hibernate-mapping>
	    <class name=3D"....Project" table=3D"Project">
	        <set name=3D"managers" inverse=3D"true" cascade=3D"all">
	            <key>
	                <column name=3D"Projectid" not-null=3D"true" />
	            </key>
	            <one-to-many class=3D".....Manager" />
	        </set>
	    </class>
	</hibernate-mapping>
=09
	Now i want to delete all my managers concerning one special project and =
add the new manager. So I do the following:
=09
	Manager manager;
	ProjectDAO dao =3D new ProjectDAO();
	Project project =3D (Project) dao.getSession().get(Project.class, =
projectID);
	Set managers =3D project.getManagers();
	managers.clear();
	manager =3D new Manager();
	manager.setEmployee(employee_manager);
	manager.setFunction(managerFunction);
	manager.setProject(project);
	dao.getSession().save(manager);
	managers.add(manager);
	project.setManagers(managers);
	dao.save(project);
=09
	But the thing is that only the new manager was added. The other =
database entries were not deleted. I thought, if i update the parent =
entry (project) the child entrys will be deleted automatically =
(project.getManagers.clear()). Where is my problem? Can anybody help?
=09
	Thank you very much!!!
=09
	Greetings from Berlin!
=09
	Ingo
=09

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--=20
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Ingo

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