Core Data Entity Not Updating Data

Question

I am trying to Update core data Entities with the below code :

(void)home:(UIBarButtonItem *)sender


{

managedObjectContext = [appDel managedObjectContext];

NSError *error;

NSFetchRequest * request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Data" inManagedObjectContext:managedObjectContext];

[request setEntity:entity];
[request setPredicate:[NSPredicate predicateWithFormat:@"name=%@ and number=%@",self.name,[NSNumber numberWithInt:temp]]];


NSManagedObject *managedObject =[[NSManagedObject alloc]initWithEntity:entity insertIntoManagedObjectContext:managedObjectContext];
managedObject = [[managedObjectContext executeFetchRequest:request error:&error] lastObject];

[managedObject setValue:self.name forKey:@"name"];
[managedObject setValue:[NSNumber numberWithInt:self.number] forKey:@"number"];

[managedObjectContext save:nil];

BOOL saved = [managedObjectContext save:&error];

if (!saved)
{
    NSLog(@"Data Not Saved");
}
else
{
    NSLog(@"Data Saved");
}
[self.navigationController popToRootViewControllerAnimated:YES];

}

Can anyone Tell me if i am doing anything wrong? I also tried This Solution But it didn't work.

Do you want to create a *new* object, or update an *existing* object? Your code is a mixture of both. — Martin R, Feb 09 '14 at 21:54
Is there only a single "Data" object, and that should be updated? — Martin R, Feb 09 '14 at 21:58
I created Entity Named Data & there are two fields in it. Attribute (name,number)(string,integer 16) — Jaymin Raval, Feb 09 '14 at 22:00
changed code to this NSManagedObject *managedObject = [[managedObjectContext executeFetchRequest:request error:&error] lastObject]; And It worked,I forgot about insertIntoManagedObjectContext.. Thanks @MartinR — Jaymin Raval, Feb 09 '14 at 22:06

score 0 · Accepted Answer · answered Feb 09 '14 at 22:00

NSManagedObject *managedObject =[[NSManagedObject alloc]initWithEntity:entity insertIntoManagedObjectContext:managedObjectContext];

creates a new object. If you want to update an existing object then you should execute only the fetch request, and update the fetched object.

Only if no (matching) object exists, then you would create it.

Core Data Entity Not Updating Data

1 Answers1