Storing NSManagedObject in a dictionary (NSDictionary)

Question

I have a custom class, which is a subclass of NSManagedObject. I would like to store it in a dictionary, but when trying to do so I receive a Property list in

Answer 1

A swift version in case anyone needs it

import CoreData 
extension NSManagedObject {
    func toDict() -> [String:Any] {
        let keys = Array(entity.attributesByName.keys)
        return dictionaryWithValues(forKeys:keys)
    }
}