Core data not saving my data

Question

I\'m using core data to save some integer (rate) and then I call save in the context:

HeartRateBeat * beat = [HeartRateBeat heartRateWithHeartRate:rate
              


        

Answer 1

I don't know about you guys, but when I want my Core Data to save, my Core Data better save.

Here's some code that will for sure save all of your Core Datas.

-(void)forceSave {
        NSManagedObjectContext * context = self.managedObjectContext; //Get your context here. 
    if (!context) {
        NSLog(@"NO CONTEXT!");
        return;
    }

    NSError * error;
    BOOL success = [context save:&error];
    if (error || !success) {
        NSLog(@"success: %@ - error: %@", success ? @"true" : @"false", error);
    }

    [context performSelectorOnMainThread:@selector(save:) withObject:nil waitUntilDone:YES];
    [context performSelector:@selector(save:) withObject:nil afterDelay:1.0];
    [context setStalenessInterval:6.0];
    while (context) {
        [context performBlock:^(){
            NSError * error;
            bool success =  [context save:&error];
            if (error || !success)
                NSLog(@"success: %@ - error: %@", success ? @"true" : @"false", error);

        }];
        context = context.parentContext;
    }

    NSLog(@"successful save!");

}

Note that this is BAD CODE. Among other problems, it's not thread-safe and takes too long. However, try using this and deleting some parts of it to your satisfaction :)

Answer 2

I get the same problem but I think its just because, I assume, like me you are just stopping the app through xcode and not actually closing it down. I use this code to force a write. Im using a UIManagedDocument, shared through appdelegate, rather than setting everything up manually.

NSError *error = nil;

if (![self.managedObjectContext save:&error]) {
    NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    abort();
}

[[AppDelegate sharedAppDelegate].userDatabase saveToURL:[AppDelegate sharedAppDelegate].userDatabase.fileURL forSaveOperation:UIDocumentSaveForOverwriting completionHandler:nil];