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CoreData - Turning to-many relationship back into a fault
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CoreData - Turning to-many relationship back into a fault


  • Subject: CoreData - Turning to-many relationship back into a fault
  • From: Andrew Bush <email@hidden>
  • Date: Fri, 2 Feb 2007 09:20:52 +1300


Hi all,

I am using a background thread to fetch some data using coredata, as suggested in the docs I pass this thread a list of objectIDs for the objects I want to fetch, I get the list of objectIDs each time by calling:

[historyItems addObjectsFromArray:[[item valueForKeyPath:@"history.objectID"] allObjects]];

in the debugger, I can see that the first time this is called it faults a to-many relationship.

CoreData: annotation: sql execution time: 0.000878s
2007-02-01 19:55:53.822 TaskTrack[2685] CoreData: annotation: to- many relationship fault "history" for objectID 0x5283440 <x- coredata://6E1FB861-D552-4A0F-9561-E25EA926BA0F/applications/p6> fulfilled from database. Got 34 rows



the next time, and everytime after that it does not.

unfortunately this means that over time I am getting an incorrect list of the item ids....more records are being added to the store elsewhere relatively quickly and I would like that to-many relationship to re-fault more than once.

Ive tried calling:

[moc refreshObject:item mergeChanges:NO];
[historyItems addObjectsFromArray:[[item valueForKeyPath:@"history.objectID"] allObjects]];


but that appears to make no difference.

is there some way I can force coredata to fault that relationship manually?


thanks for any help.


Yours cheerfully,


Andrew Bush

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