Crash while decoding with NSCoder - ios

Question

I have two model classes for saving data, I am getting crash while decoding the data.
The first class:
class User: NSObject,NSCoding, Mappable {
var authenticationToken: String?
var _id: String?
var email: String?
var profilePhoto: String?
var country: String?
var contactNo: String?
var occupation: String?
var aboutMe: String?
var role: RollType?
var createdAt: String?
var isActive: Bool?
var avg: Double?
var review: Review?
var subscribe: subscriptionType?
var isPayment: Bool?
var payment: Float?
var invoiceURL: String?
var firstName: String?
var lastName: String?
var password: String?
var pesaPal : [pesaPalData]?
required init?(map: Map) {
super.init()
mapping(map: map)
}
override init() {
super.init()
}
required init(coder aDecoder: NSCoder) {
super.init()
authenticationToken = aDecoder.decodeObject(forKey: "token") as? String
_id = aDecoder.decodeObject(forKey: "_id") as? String
email = aDecoder.decodeObject(forKey: "email") as? String
profilePhoto = aDecoder.decodeObject(forKey: "profilePhoto") as? String
country = aDecoder.decodeObject(forKey: "country") as? String
contactNo = aDecoder.decodeObject(forKey: "contactNo") as? String
occupation = aDecoder.decodeObject(forKey: "occupation") as? String
aboutMe = aDecoder.decodeObject(forKey: "aboutMe") as? String
role = RollType(rawValue: (aDecoder.decodeObject(forKey: "role") as! String))
createdAt = aDecoder.decodeObject(forKey: "createdAt") as? String
isActive = aDecoder.decodeObject(forKey: "isActive") as? Bool
subscribe = subscriptionType(rawValue: (aDecoder.decodeObject(forKey: "subscribe") as! String))
invoiceURL = aDecoder.decodeObject(forKey: "invoiceURL") as? String
isPayment = aDecoder.decodeObject(forKey: "isPayment") as? Bool
payment = aDecoder.decodeObject(forKey: "payment") as? Float
firstName = aDecoder.decodeObject(forKey: "firstName") as? String
lastName = aDecoder.decodeObject(forKey: "lastName") as? String
pesaPal = aDecoder.decodeObject(forKey: "pesaPal") as? [pesaPalData]
}
func encode(with aCoder: NSCoder) {
aCoder.encode(authenticationToken, forKey: "token")
aCoder.encode(_id, forKey: "_id")
aCoder.encode(email, forKey: "email")
aCoder.encode(profilePhoto, forKey: "profilePhoto")
aCoder.encode(country, forKey: "country")
aCoder.encode(contactNo, forKey: "contactNo")
aCoder.encode(occupation, forKey: "occupation")
aCoder.encode(aboutMe, forKey: "aboutMe")
aCoder.encode(role?.rawValue, forKey: "role")
aCoder.encode(createdAt, forKey: "createdAt")
aCoder.encode(isActive, forKey: "isActive")
aCoder.encode(subscribe?.rawValue, forKey: "subscribe")
aCoder.encode(isPayment, forKey: "isPayment")
aCoder.encode(payment, forKey: "payment")
aCoder.encode(invoiceURL, forKey: "invoiceURL")
aCoder.encode(firstName, forKey: "firstName")
aCoder.encode(lastName, forKey: "lastName")
aCoder.encode(pesaPal, forKey: "pesaPal")
}
func mapping(map: Map) {
_id <- map["_id"]
email <- map["email"]
profilePhoto <- map["profilePhoto"]
country <- map["country"]
contactNo <- map["contactNo"]
occupation <- map["occupation"]
aboutMe <- map["aboutMe"]
role <- (map["role"],EnumTransform<RollType>())
createdAt <- map["createdAt"]
isActive <- map["isActive"]
review <- map["review"]
avg <- map["avg"]
subscribe <- map["subscribe"]
isPayment <- map["isPayment"]
payment <- map["payment"]
invoiceURL <- map["invoiceURL"]
firstName <- map["firstName"]
lastName <- map["lastName"]
password <- map["password"]
pesaPal <- map["pesapalDetails"]
}
}
The second class:
class pesaPalData: NSObject, Mappable , NSCoding{
var payment1 : String?
var pesapalStatus : String?
var reference : String?
required init?(coder aDecoder: NSCoder) {
payment1 = aDecoder.value(forKey: "paymentPesa") as? String
pesapalStatus = aDecoder.value(forKey: "pesapalStatus") as? String
reference = aDecoder.value(forKey: "reference") as? String
}
required init?(map: Map) {
super.init()
self.mapping(map: map)
}
func encode(with aCoder: NSCoder) {
aCoder.encode(payment1, forKey: "paymentPesa")
aCoder.encode(pesapalStatus, forKey: "pesapalStatus")
aCoder.encode(reference, forKey: "reference")
}
func mapping(map: Map) {
payment1 <- map["payment"]
pesapalStatus <- map["pesapalStatus"]
reference <- map["reference"]
}
}
I am getting crash while decoding from the pespalData class :
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ valueForUndefinedKey:]:
this class is not key value coding-compliant for the key paymentPesa
Help would be appreciated about what's causing the crash,
Thanks

Answer 1

Aren’t you calling the wrong method on the decoder? You should be calling decodeObject(forKey:), not value(forKey:).

Answer 2

In your Encoding and Decoding you are using the key paymentPesa
but in your mapping you are using payment.
Maybe change mapping like this:
func mapping(map: Map) {
payment1 <- map["paymentPesa"]
pesapalStatus <- map["pesapalStatus"]
reference <- map["reference"]
}