I need to save my array to Core Data.
let array = [8, 17.7, 18, 21, 0, 0, 34]
The values inside that array, and the number of values are variable.
1. What do I declare inside my NSManagedObject class?
class PBOStatistics: NSManagedObject, Equatable {
@NSManaged var date: NSDate
@NSManaged var average: NSNumber
@NSManaged var historicAverage: NSNumber
@NSManaged var total: NSNumber
@NSManaged var historicTotal: NSNumber
@NSManaged var ordersCount: NSNumber
@NSManaged var historicOrdersCount: NSNumber
@NSManaged var values: [Double] //is it ok?
@NSManaged var location: PBOLocation
}
2. What do I declare inside my .xcdatamodel?
3. How do I save this in my Entity? (I use MagicalRecord)
let statistics = (PBOStatistics.MR_createInContext(context) as! PBOStatistics)
statistics.values = [8, 17.7, 18, 21, 0, 0, 34] //is it enough?
Ok, I made some research and testing. Using Transformable type, solution is simple:
1. What do I declare inside my NSManagedObject class?
@NSManaged var values: [NSNumber] //[Double] also works
2. What do I declare inside my .xcdatamodel?
Transformable
data type.
3. How do I save this in my Entity?
statistics!.values = [23, 45, 567.8, 123, 0, 0] //just this
“You can store an NSArray or an NSDictionary as a transformable attribute. This will use the NSCoding to serialize the array or dictionary to an NSData attribute (and appropriately deserialize it upon access)” - Source
Or If you want to declare it as Binary Data then read this simple article: