On Jan 16, 2009, at 21:00, Sean McBride wrote:
Quincey Morris (quinceymor...@earthlink.net) on 2009-01-16 6:53 PM
said:
The bad news is that abstract entities will cause
NSPersistentDocument's Save As to break, since it apparently uses a
Core Data migration to implement Save As, with an auto-generated
mapping model, which of course fails to copy the inherited
relationships properly. (My solution was to stop using abstract
entities in the next version of the data model. :) )
Do you have any more info on this? In what way does 'save as' break?
This sounds like a huge bug. Has it been so since 10.4.0? Is the
problem only with relationships from the abstract superentity?
I don't have a lot more info. All my Core Data development has been on
Leopard, so I don't know about the Tiger behavior.
By "break" I mean that Save As failed at the end, with a log message.
The error message made me think about the abstract entity migration
issue, so when I next had a chance I eliminated the abstract entities,
and after that Save As worked just fine.
... I just tried modifying the OutlineEdit Core Data sample program to
use an abstract entity, and it does *not* fail on Save As.
... And I just tried rebuilding that old version of the app, and it
still fails. The log error message is:
The temporary directory at "/private/var/folders/.../TemporaryItems/
(A Document Being Saved By MyApp)" could not be deleted.
In addition, the Save As returns an error which is displayed as a
document sheet. It's an array of 46 validation errors. At the time I
wrote code to coalesce the error descriptions, so it actually says:
46 validation errors have occurred:
1. parent is not valid.
2. parent is not valid.
3. listableItems is not valid.
(43 additional errors not shown)
'parent' and 'listableItems' are properties of the abstract parent
entity. I believe I once checked that all of the errors related to the
inherited properties. Incidentally, the document wasn't dirty at the
time of the Save As, and plain Save always works.
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