CoreData: Crash in NSManagedObjectContext#existingObjectWithID:error:
CoreData: Crash in NSManagedObjectContext#existingObjectWithID:error:
- Subject: CoreData: Crash in NSManagedObjectContext#existingObjectWithID:error:
- From: Felix Franz <email@hidden>
- Date: Wed, 26 Jan 2011 18:33:16 +0100
Hi all,
I have a problem with a CoreData-Document. I normally use NSManagedObjectContext#existingObjectWithID:error: method
to get the corresponding object for a given Object-ID. According to the documentation it should return nil if the
object cannot be fetched, or does not exist, or cannot be faulted.
But in this particular document it crashes (EXC_BAD_ACCESS) with:
#0 0x935e3ed4 in objc_msgSend
#1 0x949ff700 in _PFFaultHandlerFulfillFault
#2 0x949fe585 in _PFFaultHandlerLookupRow
#3 0x94a3bb16 in -[NSFaultHandler fulfillFault:withContext:error:]
#4 0x94a3ba45 in -[NSManagedObjectContext existingObjectWithID:error:]
If I issue a fetch-request with predicate [NSPredicate predicateWithFormat:@"self == %@", objectID] and the right
entity it returns an empty array.
I can exchange the existing existingObjectWithID:error: call with a fetch, but the fetch is a lot slower ...
I guess the document did sometimes contain an object with this objectID but it is somehow broken. Is there a
way to check the integrity of a CoreData-document? (It uses the SQL store, on 10.6.6 if that matters).
Thanks in advance,
Felix
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