Little diifficult to explain but I am trying to use NSPredicate for filtering an array with custom NSManagedObject by ids. I have a server that can send update, delete or add new objects, and I need to control if those objects from the JSON file already exist, if exist just update them or insert to core data if not.
I am using this predicate now :
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"storeId != %@", [jsonFile valueForKey:@"Id"];
Where jsonFile contains unparsed Store objects. But with this predicate, it will give me a huge array, since one id will be unlike some storeId, and next id will match.
Json file is some sort of this :
"Stores":[{
"id":1,
"name":"Spar",
"city":"London"
}
{
"id":2,
"name":"WalMart",
"city":"Chicago"
}];