Question

I’m trying to set a value and then return it using Core Data. This is what I`m doing right now :

NSManagedObjectContext *context = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];   

    NSManagedObject *newShot = [NSEntityDescription insertNewObjectForEntityForName:@"Shots" inManagedObjectContext:context];

    NSString *newName= @"test"; 
    [newShot setValue:newName forKey:@"shotNumber"];    

    NSError *error = nil;
    [context save:&error];

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Shots" inManagedObjectContext:context];
    [fetchRequest setEntity:entity];
    NSArray *items = [context executeFetchRequest:fetchRequest error:&error];
    [fetchRequest release];
    NSLog(@"test : %@",items);

Problem is when I want to check that it stored the data correctly by returning a NSLog of the array, this is what I’m getting :

 <NSManagedObject: 0x5bbbe10> (entity: Shots; id: 0x5b02b50 <x-coredata://F61F56A7-6A74-42AF-B565-6F9E091DA5F3/Shots/p14> ; data: <fault>)

---

Following the 2 answers, this is what I’m using :

int size = [items count];
NSLog(@"array count is %d ",size);

if (size > 0) {

    NSManagedObject *mo = [items objectAtIndex:0];  // assuming that array is not empty
    NSString *value = [[mo valueForKey:@"shotNumber"] stringValue];
    NSLog("Value : %@",value);

}

Just having this little issue :

warning: passing argument 1 of ‘NSLog’ from incompatible pointer type

How can I log [mo valueForKey:@"shotNumber"]?

Answer 1

This is valid and correct. Because you didn’t query any of its attributes or relationships, it has not been faulted in. You can either ask object at index 0 (if the result array isn’t empty) for its -valueForKey:@”shotNumber” or force the faulting by setting the fetch request’s -setReturnsObjectsAsFaults: to NO (it’s YES by default).