[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1525) multiple cascades to the same transient instance within a single object graph
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-1525?page=c...
]
Steve Mayhew commented on HHH-1525:
-----------------------------------
I humbly asset that this may be an instance of this issue:
<class name="Base">
<many-to-one name="bar" class="Bar"
not-null="true" cascade="delete" />
...
<joined-subclass name="A" extends="Base">
...
<joined-subclass name="B" extends="Base">
...
Hibernate delete,
List list = session.createCriteria(Base.class).list();
for (Iterator it = list.iterator(); it.hasNext();) {
session.delete(it.next());
}
This will throw a org.hibernate.PropertyValueException: not-null property references a
null or transient value.
Am I missing something?
multiple cascades to the same transient instance within a single
object graph
-----------------------------------------------------------------------------
Key: HHH-1525
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1525
Project: Hibernate3
Type: Improvement
Components: core
Reporter: Steve Ebersole
Assignee: Steve Ebersole
Consider an object graph being saved that contains the same transient instance multiple
times (at diffierent levels in the graph) where some of the associations define cascading
and some do not and that the associations without cascading are further defined as
not-null. Based on the order in which the associations are cascaded there is a potential
for that transient instance to cause an "unsaved transient instance" exception
if the non-cascaded and not-null association is cascaded to first, even though a
subsequent cascaced would in fact cause the instance to become managed.
Typically this is easy enough to work around by simply reordering the associations in the
mapping so that the cascaded association is before the non-cascaded one. However, this is
not always possible (the case of inheritence hierarchies comes to mind, where the
superclass associations are always cascaded to first).
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