Crash when using Between Predicate Statement and Float - iphone

Question

So i'm searching my Core Data for an item that is inside the current map's longitude and latitude. Everytime i run the statement it crashes.
the code:
NSError *error = nil;
NSFetchRequest *boutiqueRequest = [[NSFetchRequest alloc] init];
NSPredicate *predicateToRun = nil;
[boutiqueRequest setEntity:[NSEntityDescription entityForName:#"Boutique" inManagedObjectContext:managedObjectContext]];
NSLog(#"NE Longitude: %f", [neCoordLong floatValue]);
NSLog(#"NE Latitude: %f", [neCoordLat floatValue]);
NSLog(#"SW Longitude: %f", [swCoordLong floatValue]);
NSLog(#"SW Latitude: %f", [swCoordLat floatValue]);
NSPredicate *longPredicate = [NSPredicate predicateWithFormat: #"longitude BETWEEN %#", [NSArray arrayWithObjects:neCoordLong, swCoordLong, nil]];
NSPredicate *latPredicate = [NSPredicate predicateWithFormat: #"latitude BETWEEN %#", [NSArray arrayWithObjects:neCoordLat, swCoordLat, nil]];
predicateToRun = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:longPredicate, latPredicate, nil]];
[boutiqueRequest setPredicate:predicateToRun];
NSLog(#"%#", [boutiqueRequest predicate]);
NSArray *results = [managedObjectContext executeFetchRequest:boutiqueRequest error:&error];
As soon as I call the executeFetchRequest it gives me the following crash report
2011-02-24 17:42:43.183 DL2[363:207] NE Longitude: 153.5058
2011-02-24 17:42:43.183 DL2[363:207] NE Latitude: -27.811142
2011-02-24 17:42:43.183 DL2[363:207] SW Longitude: 153.286057
2011-02-24 17:42:43.184 DL2[363:207] SW Latitude: -28.033804
2011-02-24 17:42:43.184 DL2[363:207] longitude BETWEEN {153.5058, 153.2861} AND latitude BETWEEN {-27.81114, -28.0338}
2011-02-24 13:57:18.916 DL2[9628:207] -[NSCFNumber constantValue]: unrecognized selector sent to instance 0x954ba80
2011-02-24 13:57:18.925 DL2[9628:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFNumber constantValue]: unrecognized selector sent to instance 0x954ba80'
*** Call stack at first throw:
(
0 CoreFoundation 0x0121abe9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0136f5c2 objc_exception_throw + 47
2 CoreFoundation 0x0121c6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x0118c366 ___forwarding___ + 966
4 CoreFoundation 0x0118bf22 _CF_forwarding_prep_0 + 50
5 CoreData 0x00e18a0b -[NSSQLSimpleWhereIntermediate _generateSQLBetweenStringInContext:] + 1211
6 CoreData 0x00d48931 -[NSSQLSimpleWhereIntermediate generateSQLStringInContext:] + 897
7 CoreData 0x00d4843d -[NSSQLCompoundWhereIntermediate _generateMulticlauseStringInContext:] + 205
8 CoreData 0x00d48342 -[NSSQLCompoundWhereIntermediate generateSQLStringInContext:] + 770
9 CoreData 0x00d47afa -[NSSQLFetchIntermediate generateSQLStringInContext:] + 122
10 CoreData 0x00e0b31d -[NSSQLGenerator newSQLStatementForFetchRequest:ignoreInheritance:countOnly:nestingLevel:] + 413
11 CoreData 0x00d43a78 -[NSSQLAdapter _newSelectStatementWithFetchRequest:ignoreInheritance:] + 488
12 CoreData 0x00d43881 -[NSSQLAdapter newSelectStatementWithFetchRequest:] + 49
13 CoreData 0x00d4372e -[NSSQLCore newRowsForFetchPlan:] + 430
14 CoreData 0x00d42ab5 -[NSSQLCore objectsForFetchRequest:inContext:] + 357
15 CoreData 0x00d4266e -[NSSQLCore executeRequest:withContext:error:] + 206
16 CoreData 0x00df20ec -[NSPersistentStoreCoordinator executeRequest:withContext:error:] + 1084
17 CoreData 0x00d3f807 -[NSManagedObjectContext executeFetchRequest:error:] + 359
18 DL2 0x00021060 -[BoutiqueListViewController getBoutiquesToShow] + 1449
19 DL2 0x0002164f -[BoutiqueListViewController viewDidLoad] + 211
20 UIKit 0x003f265e -[UIViewController view] + 179
21 DL2 0x0001ff4e -[BoutiqueMapTabViewController openList] + 698
22 DL2 0x0001f9f3 -[BoutiqueMapTabViewController tabBar:didSelectItem:] + 110
23 UIKit 0x00542167 -[UITabBar _sendAction:withEvent:] + 283
24 UIKit 0x00344a6e -[UIApplication sendAction:to:from:forEvent:] + 119
25 UIKit 0x003d31b5 -[UIControl sendAction:to:forEvent:] + 67
26 UIKit 0x003d5647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
27 UIKit 0x003d316c -[UIControl sendActionsForControlEvents:] + 49
28 UIKit 0x00344a6e -[UIApplication sendAction:to:from:forEvent:] + 119
29 UIKit 0x003d31b5 -[UIControl sendAction:to:forEvent:] + 67
30 UIKit 0x003d5647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
31 UIKit 0x003d41f4 -[UIControl touchesEnded:withEvent:] + 458
32 UIKit 0x003690d1 -[UIWindow _sendTouchesForEvent:] + 567
33 UIKit 0x0034a37a -[UIApplication sendEvent:] + 447
34 UIKit 0x0034f732 _UIApplicationHandleEvent + 7576
35 GraphicsServices 0x01b3da36 PurpleEventCallback + 1550
36 CoreFoundation 0x011fc064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
37 CoreFoundation 0x0115c6f7 __CFRunLoopDoSource1 + 215
38 CoreFoundation 0x01159983 __CFRunLoopRun + 979
39 CoreFoundation 0x01159240 CFRunLoopRunSpecific + 208
40 CoreFoundation 0x01159161 CFRunLoopRunInMode + 97
41 GraphicsServices 0x01b3c268 GSEventRunModal + 217
42 GraphicsServices 0x01b3c32d GSEventRun + 115
43 UIKit 0x0035342e UIApplicationMain + 1160
44 DL2 0x000028fc main + 102
45 DL2 0x0000288d start + 53
I just can't seem to see the problem. I don't know if i'm too close to it, or if it's something to do with it being a Float or what! Any help would be greatly appreciated

Answer 1

Well i wasn't able to solve why the Between function didn't work - but mysql doesn't allow BETWEEN on floating point numbers either. So i'm going to assume that it's a similar reason.
I changed my code to merely create it's own between statement.
NSPredicate *longPredicate = nil;
NSPredicate *latPredicate = nil;
if ([neCoordLong floatValue] > [swCoordLong floatValue])
{
longPredicate = [NSPredicate predicateWithFormat: #" longitude <= %# AND longitude >= %#", neCoordLong, swCoordLong];
}else {
longPredicate = [NSPredicate predicateWithFormat: #" longitude <= %# AND longitude >= %#", swCoordLong, neCoordLong];
}
if ([neCoordLat floatValue] > [swCoordLat floatValue])
{
latPredicate = [NSPredicate predicateWithFormat: #" latitude <= %# AND latitude >= %#", neCoordLat, swCoordLat];
}else {
latPredicate = [NSPredicate predicateWithFormat: #" latitude <= %# AND latitude >= %#", swCoordLat, neCoordLat];
}
Hopefully this helps someone else

Answer 2

I had a similar error as well. I am pretty sure it is a very low level database related issue. Here is some more information I have -
a. With a inmemory database, I could run a test case with exactly the same data just fine.
b. When I got the error "-[__NSCFNumber constantValue]: unrecognized selector sent to instance 0xa9e4ca0". I did
(lldb) po 0xa9e4ca0
$0 = 178146464 -96.24999189101783
Not sure where 178146464 coming from. I will try the manual "between" now.

Answer 3

I don't see the exact cause either, and you haven't shown the code where the rest of boutiqueRequest's properties are set and the fetch fired (not that it matters unless you set the predicate again or something else funky), but the report
2011-02-24 13:57:18.916 DL2[9628:207] -[NSCFNumber constantValue]: unrecognized selector sent to instance 0x954ba80
indicates you're sending the message -constantValue to an object of class NSCFNumber (a toll-free NSNumber/CFNumber instance), which doesn't handle it. So I suggest you try using only portions of the predicate to find which doesn't and does cause some expression within the predicate to be substituted with an NSCFNumber instance.

Answer 4

At the beginning of your fetch you're declaring
NSPredicate *predicateToRun = nil;
And then you assign it a NSCompoundPredicate to it in
predicateToRun = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:longPredicate, latPredicate, nil]];
See if that solves it.
Rog