How to initialize class with optional properties in Swift 3 - swift3

Question

I get a web API response, which I loop through and initialize a Customer class for each JSON object in the array. The Customer class has a base class with a couple optional properties. I get errors when there are null values in the JSON, and I am not sure how to handle them properly. I am especially unsure of how to handle a null Date in swift. If anyone could give me some advice, I would really appreciate it!
JSON returned from Web API:
[{"Id":1,"BusinessId":1,"CompanyName":"Test Company4","FirstName":"Mike","LastName":"Doe","CustomerType":1,"CustomerStatus":1,"IsDeleted":false,"Created":"2016-12-22T20:12:10.2760144Z","CreatedBy":1,"Modified":"2016-12-29T19:29:26.1245219Z","ModifiedBy":1},{"Id":2,"BusinessId":1,"CompanyName":"Test Company5","FirstName":"Mike","LastName":"Doe","CustomerType":1,"CustomerStatus":1,"IsDeleted":false,"Created":"2017-01-03T20:18:51.7639708Z","CreatedBy":1,"Modified":null,"ModifiedBy":null}]
Customer class:
class Customer : BaseEntity {
var Id: Int64
var BusinessId: Int64
var CustomerType: Int64
var CustomerStatus: Int64
var CompanyName: String
var FirstName: String
var LastName: String
init?(json: [String: Any]) {
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
guard let id = json["Id"] as? Int64,
let businessId = json["BusinessId"] as? Int64,
let customerType = json["CustomerType"] as? Int64,
let customerStatus = json["CustomerStatus"] as? Int64,
let companyName = json["CompanyName"] as? String,
let firstName = json["FirstName"] as? String,
let lastName = json["LastName"] as? String,
let isDeleted = json["IsDeleted"] as? Bool
else {
return nil
}
var created = Date()
if let cdate = json["Created"] as? String {
created = formatter.date(from: cdate)!
}
let createdBy = json["CreatedBy"] as? String
var modified = Date()
if let mdate = json["Modified"] as? String {
modified = formatter.date(from: mdate)!
}
let modifiedBy = json["ModifiedBy"] as? String
self.Id = id
self.BusinessId = businessId
self.CustomerType = customerType
self.CustomerStatus = customerStatus
self.CompanyName = companyName
self.FirstName = firstName
self.LastName = lastName
super.init(isDeleted: isDeleted, created: created, createdBy: createdBy, modified: modified, modifiedBy: modifiedBy)
}
}
BaseEntity class that contains some optional properties:
class BaseEntity {
var IsDeleted: Bool
var Created: Date
var CreatedBy: String
var Modified: Date?
var ModifiedBy: String?
init(isDeleted: Bool, created: Date, createdBy: String, modified: Date, modifiedBy: String) {
self.IsDeleted = isDeleted
self.Created = created
self.CreatedBy = createdBy
self.Modified = modified
self.ModifiedBy = modifiedBy
}
}
One of the problems I am running into is when I initialize Customer, my Customer object looks like this. Then when I try to insert it into a database, it does not recognize the BaseEntity properties as properties of Customer:
Id = 1
BusinessId = 1
CustomerType = 1
CustomerStatus = 1
CompanyName = "Test Company4"
FirstName = "Mike"
LastName = "Doe"
BaseEntity
IsDeleted = true
Created = '1/1/2017'
CreatedBy = 1
Modified = '1/1/2017'
ModifiedBy = 1

Answer 1

You need to define your class type for model
class BaseEntity {
to
class BaseEntity: NSObject {
This is the way you can create your model class: -
//Model Class
class BaseModel: NSObject {
var name: String
var address: String
var mobilenumber: Int
init(name: String?, address: String?, mobilenumber: Int?) {
self.name = name ?? ""
self.address = address ?? ""
self.mobilenumber = mobilenumber ?? 0
}
}
//Pass value inside model class
class ViewController: UIViewController {
var model = [BaseModel]() //Model Array Initialization here
override func viewDidLoad() {
super.viewDidLoad()
//Pass value inside Model
model.append(BaseModel(name: "Your name", address: "Your address", mobilenumber: 5545545452))
}
}
//Get value from Model class
class DetailsController: UIViewController {
var details: BaseModel?
override func viewDidLoad() {
super.viewDidLoad()
//Retrive value from model
let name = details?.name ?? ""
let address = details?.address ?? ""
let mobile = details?.mobilenumber ?? 0
}
}