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From "Bobby Lawrence (JIRA)" <j...@apache.org>
Subject [jira] Created: (OJB-36) auto-insert attribute of reference/collection descriptor
Date Fri, 29 Apr 2005 22:36:21 GMT
auto-insert attribute of reference/collection descriptor
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         Key: OJB-36
         URL: http://issues.apache.org/jira/browse/OJB-36
     Project: OJB
        Type: Improvement
  Components: PB-API  
    Versions: 1.0.3    
 Environment: Windows XP Pro, Java 1.4.2
    Reporter: Bobby Lawrence


Currently , there are "auto-retrieve", "auto-update" and "auto-delete" attributes for reference/collection
descriptors.  Auto-retrieve tells OJB to retrieve a reference or collection when its parent
is instantiated.  Auto-delete tells OJB to delete a reference or collection when its parent
is deleted (much like cascade-delete).  Auto-update tells OJB to insert OR update a reference
or collection when its parent is inserted or deleted.

I would like to see an "auto-insert" attribute.  Basically break out the logic from "auto-update"
into an "auto-insert" and an "auto-update".  The "auto-insert" would tell OJB to insert the
reference when its parent is updated or inserted.  The "auto-update" would tell OJB to update
the reference when its parent is updated or inserted.

The current way causes some headache it seems.  
I have a WAR that uses OJB for its backend.  
Say I have a Person object that contains a reference to an Organization object.  In the repository.xml,
auto-update is set to "object".  Basically, if the Organization doesn't exist, I want OJB
to add it.  If it exists alreay, I don't want OJB to do anything.
Say I have a JSP where a user can update the Organization of the Person.  I want to display
all the organizations in a select box with the OrganizationId as the value to pass to the
next step.  Now, in the next step, if I don't lookup the Organization for that id, but just
call PBroker.store(Person w/ Organization that only has id), OJB will update the organization
table for that organization id and set all the other fields to null.

It would be nice if I could tell OJB to insert when it needs to and update when it needs to.
 Basically break the logic out.

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