I'm getting the following error in my application: CoreData: error: (1) I/O error for database at /Users/nick/<library path>/blah.sqlite. SQLite error code:1, 'no such column: t1.Z_3RELATIONSHIP<ENTITY>1
This error only occurs if I build the project in Xcode 4.1 on Lion. If I build the same project on Snow Leopard in Xcode 4.0.2, then it runs as expected. If I launch the code built on 10.6/4.0.2 then it also runs as expected on 10.7. I've narrowed it down to only many-to-many relationships that are causing the issue, too. If I comment out anywhere that accesses [someObj mutableSetValueForKey:@"relationshipKey"] in code and disconnect the relevant bindings in my XIBs, then the application loads and displays the rest of the data fine. The other interesting thing is that if I delete my application data and launch the code built on 10.7/4.1, then it runs as expected - data is saved/loaded correctly. Traditionally I've built against the 10.5 SDK as I supported Leopard, so the database was originally created and managed during the Leopard days. Creating a fresh one on Snow Leopard triggers the same issue. I've tried building on SL for 10.6 and it works fine too. I've searched high and low for others with this issue - I've only found a couple of similar hits, both on cocoa-dev, but unfortunately with no replies: http://www.cocoabuilder.com/archive/cocoa/275386-10-6-2-core-data-incompatibility.html And this one, which seems like a pretty similar issue: http://osdir.com/ml/cocoa-dev/2009-09/msg00709.html So it seems like there is some kind of difference in how many-to-many relationships work somewhere along the line, triggered based on whether I build on SL/4.0.2 or L/4.1. Has anyone encountered this before? I did contact both the posters of those previous threads but unfortunately it didn't lead to a solution. Of course I could stay using 10.6/4.0.2 forever, but that's not ideal. :) This is the stack trace from where I attempt to access a value from one of these relationships, though it's about what you'd expect given the error: 0 CoreFoundation 0x9b466e77 __raiseError + 231 1 libobjc.A.dylib 0x9b25e149 objc_exception_throw + 155 2 CoreData 0x9233814b -[NSSQLiteConnection prepareSQLStatement:] + 1435 3 CoreData 0x9235f2d0 -[NSSQLChannel selectRowsWithCachedStatement:] + 80 4 CoreData 0x923562eb newFetchedRowsForFetchPlan_MT + 875 5 CoreData 0x923423d5 -[NSSQLCore newRowsForFetchPlan:] + 325 6 CoreData 0x9239b2f4 -[NSSQLCore newFetchedPKsForSourceID:andRelationship:] + 2644 7 CoreData 0x9239a235 -[NSSQLCore newValueForRelationship:forObjectWithID:withContext:error:] + 981 8 CoreData 0x92399e4e -[NSPersistentStoreCoordinator(_NSInternalMethods) newValueForRelationship:forObjectWithID:withContext:error:] + 78 9 CoreData 0x92399db2 -[NSFaultHandler retainedFulfillAggregateFaultForObject:andRelationship:withContext:] + 898 10 CoreData 0x923995da -[_NSFaultingMutableSet willRead] + 250 11 CoreData 0x923994a3 -[_NSFaultingMutableSet countByEnumeratingWithState:objects:count:] + 35 12 CoreData 0x923ba469 -[_NSNotifyingWrapperMutableSet countByEnumeratingWithState:objects:count:] + 57 Cheers, -nick _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
