Core Data Save Error (NSValidationErrorKey, Cocoa error 1570) saving NSDate

Question

I'm getting an error with saving to a Core data object in Xcode.

Xcode says that the error is in the NSDate variable 'datum' but I have tried almost everything. Error is:

2011-07-12 18:01:29.068 WeekLijstje[3205:207] Core Data Save Error NSValidationErrorKey    datum NSValidationErrorPredicate  (null)  NSValidationErrorObject <DagLijst: 0x6e2fcd0> (entity: DagLijst; id: 0x6e2fd30 <x-coredata:///DagLijst/t99F423FC-AAE9-4692-9264-EF0FF7A020572> ; data: {     Voedsel = nil;     datum = nil;     hoeveelheid = 0;     punten = 0; }) NSLocalizedDescription:The operation couldn’t be completed. (Cocoa error 1570.) 

A small code snipet:

        DagLijst *newDaglijst = [NSEntityDescription insertNewObjectForEntityForName:@"DagLijst" inManagedObjectContext:self.managedObjectContext];          NSDate *selDatum = [NSDate date];         newDaglijst.punten = [NSNumber numberWithInteger:10];         newDaglijst.hoeveelheid = [NSNumber numberWithInt:100];         newDaglijst.Voedsel = geselecteerdVoedsel;         newDaglijst.datum = selDatum;         NSError *error = nil;         if (![newDaglijst.managedObjectContext save:&error]) { ... 

Also the class of the DagLijst object:

@interface DagLijst : NSManagedObject { @private } @property (nonatomic, retain) NSDate * datum; @property (nonatomic, retain) NSNumber * punten; @property (nonatomic, retain) NSNumber * hoeveelheid; @property (nonatomic, retain) Voedsel *Voedsel;  @end 

So you can see that I put an NSDate into the 'datum' variable. But on execution I still get an error.

Answer 1

The cocoa error 1570 means that mandatory fields are not filled in. In this case, your have two attribues that are nil : Voedsel and datum.

I see in your code :

newDaglijst.Voedsel = geselecteerdVoedsel; newDaglijst.datum = selDatum; 

Check that geselecteerdVoedsel and selDatum are not nil or that they are overreleased and finish to be nil. If they are optional data (but I don't think so), define them as optional in coredata.

Hope this help,

Answer 2

as Michael A said. Check your attributes value are not nil. There are 2 alternatives to get rid of these error. Case 1:If 2 attributes are Required

If the 2 attributes are required attributes then it is mandatory to check the values you are passing are not nil,It may happens sometimes,If u want to get out of these error u have to give default values for those attributes in attributes inspector of your Entity in data Model

Case 2: Set those attributes to optional in attribute inspector by selecting the check mark of optional.

Me too struggled for days to know these error. Hope it helps someone.