How to check if something is stored in CoreData
- by Terrel Gibson
Hi I want to be able to tore some information in core data and but i am unsure of how to check if the file was saved properly. I tried using NSLog but it returns null when its called. I have a dictionary which has a uniqueID and a title which I want to save. I pass this in along with the context of the database. I then sort the database to check if it has any duplicates or not, if not then I add the file.
+(VacationPhoto*) photoWithFlickrInfo: (NSDictionary*) flickrInfo inManagedObjectContext: (NSManagedObjectContext*) context{
//returns the dictionary
NSLog(@"Photo To Store =%@", flickrInfo);
VacationPhoto * photo = nil;
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"VacationPhoto"];
request.predicate = [NSPredicate predicateWithFormat:@"uniqueID = %@", [flickrInfo objectForKey:FLICKR_PHOTO_ID]];
NSSortDescriptor * descriptor = [NSSortDescriptor sortDescriptorWithKey:@"title" ascending:YES];
request.sortDescriptors = [NSArray arrayWithObject:descriptor];
NSError *error = nil;
NSArray *matches = [context executeFetchRequest:request error:&error];
if (!matches || [matches count] > 1) {
// handle error
} else if ( [matches count] == 0){
photo.title = [flickrInfo objectForKey:FLICKR_PHOTO_TITLE];
//Returns NULL when called
NSLog(@"title = %@", photo.title);
photo.uniqueID = [flickrInfo objectForKey:FLICKR_PHOTO_ID];
//Returns NULL when called
NSLog(@"ID = %@", photo.uniqueID);
} else {
//If photo already exists this is called
photo = [matches lastObject];
}
return photo;
}
