This has me totally stumped.
I have an app that contains (currently) three Entities:
Person
Deed; and
DeedDoneByPerson
Deed is effectively a template object. I'll probably re-do the object model but
I want to understand what's going on with this bug first.
Deeds can be good or not and have a degree of goodness.
Here is the code that creates a new deed and deedDoneByPerson:
NSManagedObject *newDeed = [ NSEntityDescription
insertNewObjectForEntityForName: @"Deed"
inManagedObjectContext: context ];
int score;
if( self.isGood ) score = sender.tag;
else score = - sender.tag;
[newDeed setValue: self.deedName.text
forKey: @"deedName" ];
[newDeed setValue: [ NSNumber numberWithBool: self.isGood ]
forKey: @"isGood" ];
[newDeed setValue: [ NSNumber numberWithInt: score ]
forKey: @"points" ];
NSManagedObject *newDeedDoneByPerson = [ NSEntityDescription
insertNewObjectForEntityForName: @"DeedDoneByPerson"
inManagedObjectContext: context ];
[newDeedDoneByPerson setValue: newDeed
forKey: @"deedDone" ];
[newDeedDoneByPerson setValue: selectedPerson
forKey: @"byPerson" ];
[newDeedDoneByPerson setValue: [ NSNumber numberWithBool: self.isGood ]
forKey: @"isGood" ];
// let 'points' and 'instances' default
FYI2( @":: Create new deed [...@]", self.deedName.text );
NSError *error;
if (![context save:&error]) //!!!!!!! CRASHES HERE !!!!!!!!
{
NSLog(@"!! Unresolved error %@, %@", error, [error userInfo]);
abort();
}
The following scenarios work:
With a fresh app (deleted from the simulator and re-installed), create a person
and add any number of bad deeds to that person - they are displayed correctly
and sqlite has the expected contents.
With a fresh app (deleted from the simulator and re-installed), create a person
and add any number of good deeds to that person - they are displayed correctly
and sqlite has the expected contents.
With a fresh app (deleted from the simulator and re-installed), create a person
and add any number of bad deeds to that person - they are displayed correctly
and sqlite has the expected contents. Then create another person and add any
number of good deeds to that person - they are displayed correctly and sqlite
has the expected contents
The following scenario does NOT work:
With a fresh app (deleted from the simulator and re-installed), create a person
and add a bad deed to that person then attempt to add a good deed. BOOM
Stack trace:
#0 0x93affedb in objc_msgSend
#1 0x939f4b6c in ??
#2 0x0001763a in _nsnote_callback
#3 0x01d34005 in _CFXNotificationPostNotification
#4 0x00014ef0 in -[NSNotificationCenter
postNotificationName:object:userInfo:]
#5 0x01ba717d in -[NSManagedObjectContext(_NSInternalNotificationHandling)
_postObjectsDidChangeNotificationWithUserInfo:]
#6 0x01c06763 in -[NSManagedObjectContext(_NSInternalChangeProcessing)
_createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:]
#7 0x01b8b5ea in -[NSManagedObjectContext(_NSInternalChangeProcessing)
_processRecentChanges:]
#8 0x01bc1728 in -[NSManagedObjectContext save:]
#9 0x00005434 in -[NewDeedViewController commit:] at
NewDeedViewController.m:131 <------------------- CODE ABOVE
#10 0x00298459 in -[UIApplication sendAction:to:from:forEvent:]
#11 0x002fbba2 in -[UIControl sendAction:to:forEvent:]
#12 0x002fddc3 in -[UIControl(Internal) _sendActionsForEvents:withEvent:]
#13 0x002fcb0f in -[UIControl touchesEnded:withEvent:]
#14 0x002b1e33 in -[UIWindow _sendTouchesForEvent:]
#15 0x0029b81c in -[UIApplication sendEvent:]
#16 0x002a20b5 in _UIApplicationHandleEvent
#17 0x0252cef1 in PurpleEventCallback
#18 0x01d40b80 in CFRunLoopRunSpecific
#19 0x01d3fc48 in CFRunLoopRunInMode
#20 0x0252b7ad in GSEventRunModal
#21 0x0252b872 in GSEventRun
#22 0x002a3003 in UIApplicationMain
#23 0x00001cb4 in main at main.m:14
I don't understand how the value of 'score' breaks things. If I get rid of the
negation in this code:
int score;
if( self.isGood ) score = sender.tag;
else score = - sender.tag;
everything works fine: adding good and bad to the same person is acceptable.
Any suggestions on what to investigate?
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