On Mar 5, 2009, at 7:15 AM, David Avendasora wrote:
I also get the error if it the relationship is set to "Owns
Destination" and the delete rule is "Deny"
Having these two settings, unless I'm missing something, are in
direct conflict with each other.
I think if Owns Destination is checked, then the following should
automatically happen:
1) Delete Rule should be set to "Cascade" and drop down disabled
(anything else is in conflict with Owns Destination).
2) If there is an inverse relationship it should be set to
"Required" (not Optional) and the checkbox disabled with a note
stating that the relationship is Required by the Owns Destination
setting on the inverse relationship.
Am I missing anything?
From the old EOModeler docs:
Owns Destination and Propagate Primary Key
The Owns Destination option lets you specify whether the
relationship’s source owns its destination objects. When a source
object owns its destination object, for example, as when an Agent
object owns its Customer objects, when a destination object (Customer)
is removed from the relationship, it is also removed from the data
source. Ownership implies that an owned object cannot exist without
its owner.
So yes, cascade delete appears to be the only option that makes sense
when the owner is deleted. (http://developer.apple.com/documentation/WebObjects/UsingEOModeler/5WorkingWithRelationships/chapter_5_section_2.html
)
On a similar note, if you create a to-many relationship in entity
modeler, by default the delete rule is set to nullify but the reverse
to-one is set as mandatory... it seems to me that the default should
be deny delete. Model validation seems appropriate too. I filed it a
while back (http://issues.objectstyle.org/jira/browse/WOL-924) but it
has no votes so far... 0:-)
Ramsey
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