[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1525) multiple cascades to the same transient instance within a single object graph

[Steve E. (JIRA) <no...@at...>]

multiple cascades to the same transient instance within a single object graph
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         Key: HHH-1525
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1525
     Project: Hibernate3
        Type: Improvement

  Components: core  
    Reporter: Steve Ebersole
 Assigned to: 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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