Alamofire + Decodable - how turn responseJSON to NSData

Question

I'm pretty sure that my problem is easy solving, but I can't find any solution. So I have Alamofire request and have a trouble with handling data types. I have so many 'printing out' just to check what data I've got step by step.

Alamofire.request(URL, method: .get, headers: headers).responseJSON { response in
            switch responseJSON.result {
            case .success(let value):
                print(type(of: value))  //__NSDictionaryI
                print(value)
                print(type(of:responseJSON))  //DataResponse<Any>
                print(responseJSON) . //SUCCESS: {"billing_addresses" =     (...
                print(responseJSON.value as Any) . //Optional({...
                //print(responseJSON.value as! [[String:Any]]) . //Could not cast value of type '__NSDictionaryI' (0x10b9fb508) to 'NSArray' (0x10b9fb008).

                do {
                    let decoder = JSONDecoder()
                    let model = try decoder.decode(Info.self, from: value as! Data) //Decode JSON Response Data
                    print(model.id)
                } catch let parsingError {
                    print("Error", parsingError)
                }

Now I have an error: **Could not cast value of type '__NSSingleEntryDictionaryI' (0x10d240f78) to 'NSData' (0x10d241090).**

value of responseJSON is:

(I'm not sure that this value is correct, because when I've check in Postman all strings is doublequoted, and value of "is_default" is true/false, not 0/1. But in the Xcode I've got this in the console. So maybe problem in the responseJSON?..)

And there could be zero address, or several ones.

{
"id": 40128,
"username": "test6",
"email": "test6@on.com",
"billing_addresses": [
    {
        "address_name": null,
        "country_code": "US",
        "first_name": "Ted",
        "last_name": "Qqqq",
        "company_name": "",
        "address_line1": "308 Sea Lane",
        "address_line2": "",
        "city": "QQQQ",
        "state": "FL",
        "postcode": "32000",
        "email_address": "test6@on.com",
        "phone_number": "11111111",
        "is_default_for_billing": true
    }
],
"shipping_addresses": [
    {
        "address_name": null,
        "country_code": "US",
        "first_name": "Ted",
        "last_name": "Qqqq",
        "company_name": "",
        "address_line1": "308 Sea Lane",
        "address_line2": "",
        "city": "QQQQ",
        "state": "FL",
        "postcode": "32000",
        "is_default_for_shipping": true
    }
]

}

And here is model

struct Info : Decodable {
                    let id: Int
                    let email: String
                    let username: String
                    let billing_addresses: Billings
                    let shipping_addresses: Shippings
                }
                struct Billings: Decodable{
                    let address_name: String
                    let country_code: String
                    let first_name: String
                    let last_name: String
                    let company_name: String
                    let address_line1: String
                    let address_line2: String
                    let city: String
                    let state: String
                    let postcode: String
                    let email_address: String
                    let phone_number: String
                    let is_default_for_billing: Bool

                }
                struct Shippings:Decodable{
                    let address_name: String
                    let country_code: String
                    let first_name: String
                    let last_name: String
                    let company_name: String
                    let address_line1: String
                    let address_line2: String
                    let city: String
                    let state: String
                    let postcode: String
                    let is_default_for_shipping: Bool

                }

If I try to use SwiftyJSON with value as parameter I have an error that Any couldn't be Data and I really don't know what should I do.

Answer 1

responseJSON.result.value returns the deserialized collection type, in your case a dictionary [String:Any]

To use JSONDecoder you need the raw data which is in response.data

let model = try decoder.decode(Info.self, from: response.data) //Decode JSON Response Data

---

Consider that you will run into decoding errors: billing_addresses and shipping_addresses are arrays

let billing_addresses: [Billings] 
let shipping_addresses: [Shippings] // better name both structs in singular form (Billing, Shipping)

and a few values could be numbers rather than strings.

Anyway it's recommended to use the convertFromSnakeCase key decoding strategy to get rid of the ugly snake_case names.

Edit:

Here are your structs with camelCased names and singular forms, you have to add

decoder.keyDecodingStrategy = .convertFromSnakeCase

---

struct Info : Decodable {
    let id: Int
    let email: String
    let username: String
    let billingAddresses: [Billing]
    let shippingAddresses: [Shipping]
}

struct Billing : Decodable {
    let addressName: String?
    let countryCode, firstName, lastName, companyName: String
    let addressLine1, addressLine2, city, state, postcode: String
    let emailAddress, phoneNumber: String
    let isDefaultForBilling: Bool

}
struct Shipping : Decodable {
    let addressName: String?
    let countryCode, firstName, lastName, companyName: String
    let addressLine1, addressLine2, city, state, postcode: String
    let isDefaultForShipping: Bool
}