[bug #18938] Wrong nullify in ToMany relationship

[David Ayers]

Update of bug #18938 (project gnustep):

                Severity:           4 - Important => 3 - Normal             
             Assigned to:                    None => ayers                  

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Follow-up Comment #1:

IIUC, the behavior due to the entity definition may partly undefined as
primary and foreign keys should not be class properties.

http://developer.apple.com/documentation/LegacyTechnologies/WebObjects/WebObjects_4.5/System/Documentation/Developer/EnterpriseObjects/DevGuide/EOsI2.html#821
Eventhough they name exceptions to this rule, it's my experience that these
exceptions cause issues as you are refering to.  I think GDL2 could try to
support primary keys as class attributes, but I don't think the hastle for
foreign keys is managable and a lot less useful.  (Primary keys being
generally immuatable cause a lot less house keeping).

Yet when trying to create a test case, I noticed some issues with propagating
the foreign key with addObject:toBothSidesOfRelationshipWithKey: without
calling removeObject:fromBothSidesOfRelationshipWithKey: to clear the
previous relationship, which when fixed, may happen to resolve your issue
also.  I just need to find some time to look at it a bit.


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