Core Data: adding a child data element, saving... 'Selector Not Recognized'
Core Data: adding a child data element, saving... 'Selector Not Recognized'
- Subject: Core Data: adding a child data element, saving... 'Selector Not Recognized'
- From: "Frederick C. Lee" <email@hidden>
- Date: Tue, 4 Apr 2006 12:03:54 -0700
Greetings:
This is what I got when attempting to SAVE a MOC after adding a
daughter MO:
*** -[MapManagedObject encodeWithCoder:]: selector not recognized
[self = 0x39d7500]
["Western Europe" Map] --->> ["One" MapCoordinates]
MapManagedObject --->> NSManagedObject
Question: What could be the problem 'selector' in this case?
--------------------------
The only 'selector' I can think of is "mapcoordinates" which is the
relationship link
between the map (parent) and the coordinates (mapcoordinates).
And as you can see below, the link appears to be okay.
Scenario:
1) I programmatically created a child MO and added it to the MOC.
2) I attempted to SAVE the MOC. <-- bombs
3) I Checked the MOC via debugger, all appear to be okay.
My remedy attempt:
1) Delete & Rebuilt the persistent data file.
2) Did a b [NSException raise] in the debugger.
Pending breakpoint 10 - "[NSException raise]" resolved
All I know is that it has something to do with the parent
'MapManagedObject'.
["Western Europe" Map] --->> ["One" Map]
MapManagedObject --->> NSManagedObject
============================
I checked the MOC just before the SAVE and can see the inserted child
object, and its parent:
- (BOOL)saveData {
NSError *error = nil;
--> if (![[self managedObjectContext] save:&error]) {
[[NSApplication sharedApplication] presentError:error];
return FALSE;
}
NSLog(@"*** Saved ***");
return TRUE;
}
==========================
MapCoordinates MO (child):
["Western Europe" Map] --->> ["One" Map]
(gdb) po [managedObjectContext insertedObjects]
<NSCFSet: 0x3d09a70> (<MapManagedObject: 0x39d7500> (entity:
MapCoordinates; id: 0x39c1fc0 <x-coredata:///MapCoordinates/
t586CEC8D-57A7-413D-B501-C1F127D67F7C> ; data: {
map = 0x39eabe0 <x-coredata://0CC53C8C-C0A3-44BA-8291-
B9ADD8C48B8F/Map/p2>;
name = One;
x = 272;
y = 106;
}))
==========================
Map MO (abridged parent):
(gdb) po [managedObjectContext objectWithID:0x39eabe0]
<MapManagedObject: 0x39ec0d0> (entity: Map; id: 0x39eabe0 <x-
coredata://0CC53C8C-C0A3-44BA-8291-B9ADD8C48B8F/Map/p2> ; data: {
city = nil;
coordinates = nil;
country = nil;
mapcoordinates = (
0x39c1fc0 <x-coredata:///MapCoordinates/t586CEC8D-57A7-413D-
B501-C1F127D67F7C>
);
memo = nil;
memoData = nil;
name = "Western Europe";
province = nil;
region = 0x3d04f80 <x-coredata://0CC53C8C-C0A3-44BA-8291-
B9ADD8C48B8F/Region/p1>;
url = nil;
})
(gdb)
========================================================================
==============
Ric.
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