EvGeniy Ilyin EvGeniy Ilyin - 7 months ago 27
Swift Question

CoreData: Error - entity is not key value coding-compliant ID

i have core data error, when i try save relation between Group <<->> Contact

i fetch one Contact from coredata by hashUser, and one Group by uid
and try adding relation to-many with func

// extension CXDMContact
func addGroup(value: CXDMGroup) {
let items = self.mutableSetValueForKey("groups");
items.addObject(value)
}


when i try save it, i get exeption

CoreData: error: Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. [<CXDMGroup 0x7fb7924aa770> valueForUndefinedKey:]: the entity Group is not key value coding-compliant for the key "id". with userInfo {
NSTargetObjectUserInfoKey = "<CXDMGroup: 0x7fb7924aa770> (entity: Group; id: 0xd0000000000c0000 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Group/p3> ; data: {\n contacts = (\n \"0xd000000000040002 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Contact/p1>\"\n );\n uid = 5;\n})";
NSUnknownUserInfoKey = id;
}

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<CXDMGroup 0x7fb7924aa770> valueForUndefinedKey:]: the entity Group is not key value coding-compliant for the key "id".'


but i not have any ID field, and if i look in managedObjectContext in the moment - i see

(lldb) po managedObjectContext.updatedObjects
▿ 2 elements
- [0] : <CXDMContact: 0x7fb7927f5270> (entity: Contact; id: 0xd000000000040002 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Contact/p1> ; data: {
chatStatus = nil;
companyId = nil;
companyName = OWN;
companySubscription = nil;
connectedLoads = nil;
countryCode2 = nil;
departmentName = nil;
email = nil;
firstname = Ownname;
groups = (
"0xd0000000000c0000 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Group/p3>"
);
jobTitle = nil;
lastname = Lastname;
messages = "<relationship fault: 0x7fb7924a25b0 'messages'>";
phone1 = nil;
phone2 = nil;
serialNumber = nil;
status = Offline;
timeZoneName = nil;
userHash = 1002;
})
- [1] : <CXDMGroup: 0x7fb7924aa770> (entity: Group; id: 0xd0000000000c0000 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Group/p3> ; data: {
contacts = (
"0xd000000000040002 <x-coredata://E66299CB-12A5-4152-8B49-8E9B3B68762F/Contact/p1>"
);
uid = 5;
})

(lldb) po managedObjectContext.insertedObjects
0 elements

(lldb) po managedObjectContext.deletedObjects
0 elements


i don't understand where does key "id"?
please help

Answer

This issue, as the error hints at, has to do with something observing the save of the context. If you are using a NSFetchedResultsController or something else that monitors that event it is there that you have the issue. Perhaps a typo somewhere in a UITableViewCell?

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