[Hibernate-issues] [Hibernate-JIRA] Updated: (HHH-785) Persistence through cascading should have higher precedence than orphan-delete

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The following issue has been updated:

    Updater: Christian Bauer (mailto:chr...@hi...)
       Date: Sat, 23 Jul 2005 3:42 PM
    Changes:
             Component changed to core
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For a full history of the issue, see:

  http://opensource.atlassian.com/projects/hibernate/browse/HHH-785?page=history

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View the issue:
  http://opensource.atlassian.com/projects/hibernate/browse/HHH-785

Here is an overview of the issue:
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        Key: HHH-785
    Summary: Persistence through cascading should have higher precedence than orphan-delete
       Type: Improvement

     Status: Unassigned
   Priority: Major

 Original Estimate: Unknown
 Time Spent: Unknown
  Remaining: Unknown

    Project: Hibernate3
 Components: 
             core
   Versions:
             3.1 beta 1

   Assignee: 
   Reporter: Christian Bauer

    Created: Sat, 23 Jul 2005 3:42 PM
    Updated: Sat, 23 Jul 2005 3:42 PM

Description:
A typical tree mapped using an adjacency list:

<many-to-one name="parent" cascade="none"/>
<set name="children" cascade="all, delete-orphan"/>

A normal tree operation is moving a node:

a.remove(b);
c.add(b);

This results in an exception, as Hibernate currently rates the delete-orphan as more important and warns that the node would become persistent again through cascading. However, this is the only way to implement relocation of a node in a tree without resorting to complex session coding. I argue that the "delete orphans" guarantee given in the mapping should not have precedence over the the actual non-orphaned persistent state in the Session.



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