[Hibernate] problems with cascade
Hello, i have the following problem. i have a table "projects" and a table "managers" with a i think called "1:N" relationship. My mapping file (partly): hibernate-mapping class name="Project" table="Project" set name="managers" inverse="true" cascade="all" key column name="Projectid" not-null="true" / /key one-to-many class=".Manager" / /set /class /hibernate-mapping Now i want to delete all my managers concerning one special project and add the new manager. So I do the following: Manager manager; ProjectDAO dao = new ProjectDAO(); Project project = (Project) dao.getSession().get(Project.class, projectID); Set managers = project.getManagers(); managers.clear(); manager = 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); 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? Thank you very much!!! Greetings from Berlin! Ingo begin:vcard fn:Ingo Villnow n:Villnow;Ingo org:University of Applied Sciences Berlin;Applied Computer Sciences adr:;;Treskowalle 8;Berlin;Berlin;10318;Deutschland email;internet:[EMAIL PROTECTED] title:Student der FHTW Berlin tel;work:+49 30 267 42675 tel;home:+49 30 497 87 432 tel;cell:+49 176 23 37 59 49 x-mozilla-html:TRUE url:http://www.fhtw-berlin.de version:2.1 end:vcard - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
Re: [Hibernate] problems with cascade
No a hibernate member, but maybe cascade=all, delete-orphan could do the trick ? De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Ingo Villnow Envoyé : mercredi 21 novembre 2007 11:05 À : hibernate-devel@lists.sourceforge.net Objet : [Hibernate] problems with cascade Hello, i have the following problem. i have a table projects and a table managers with a i think called 1:N relationship. My mapping file (partly): hibernate-mapping class name=Project table=Project set name=managers inverse=true cascade=all key column name=Projectid not-null=true / /key one-to-many class=.Manager / /set /class /hibernate-mapping Now i want to delete all my managers concerning one special project and add the new manager. So I do the following: Manager manager; ProjectDAO dao = new ProjectDAO(); Project project = (Project) dao.getSession().get(Project.class, projectID); Set managers = project.getManagers(); managers.clear(); manager = 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); 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? Thank you very much!!! Greetings from Berlin! Ingo - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
Re: [Hibernate] problems with cascade
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:[EMAIL PROTECTED] Envoyé : mercredi 21 novembre 2007 11:20 À : 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? thanks 2007/11/21, Massip, Etienne [EMAIL PROTECTED]: No a hibernate member, but maybe cascade=all, delete-orphan could do the trick ? De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Ingo Villnow Envoyé : mercredi 21 novembre 2007 11:05 À : hibernate-devel@lists.sourceforge.net Objet : [Hibernate] problems with cascade Hello, i have the following problem. i have a table projects and a table managers with a i think called 1:N relationship. My mapping file (partly): hibernate-mapping class name=Project table=Project set name=managers inverse=true cascade=all key column name=Projectid not-null=true / /key one-to-many class=.Manager / /set /class /hibernate-mapping Now i want to delete all my managers concerning one special project and add the new manager. So I do the following: Manager manager; ProjectDAO dao = new ProjectDAO(); Project project = (Project) dao.getSession().get(Project.class, projectID); Set managers = project.getManagers(); managers.clear(); manager = 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); 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? Thank you very much!!! Greetings from Berlin! Ingo - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel -- Liebe Grüße Ingo sites: http://www.herrgustav.de http://www.myspace.com/herrgustav http://www.myspace.com/mrvill mailto: [EMAIL PROTECTED] - [EMAIL PROTECTED] - [EMAIL PROTECTED] - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ hibernate-devel mailing list hibernate-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hibernate-devel
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