send array of json objects in ios - ios

Question

I have a post request that has a body like this
{
"cars": [
{
"id": 126,
"drivers": [
"xxx#gmail.com"
]
},
{
"id": 128,
"drivers": [
"mmm#gmail.com"
]
}
]
}
the id and drivers are changeable, and I got them from another api so how to send this body with the post request?
on the other hand I have a textField that takes another email of driver, I want to change drivers when this request was sent.
example:
{
"cars": [
{
"id": 126,
"drivers": [
"xxx#gmail.com",
"sss#gmail.com"
]
},
{
"id": 128,
"drivers": [
"mmm#gmail.com"
]
}
]
}
As you can see I want to update the drivers to the new one when I tap add button on the specific textField depends on the id.
This is my code
public static func loadDrivers(owners: [Owner], drivers: [Driver], driverEmail: String!, i: Int, completion: #escaping (_ code:Int?)-> Void) {
let headers: HTTPHeaders = [
"Accept": "application/json"
]
var para2 = [String : [[String : Any]]]()
para2 = [
"cars": [
[
"id": owners[i].id,
"drivers": [
drivers[i].email,
driverEmail
]
]
]
]
if driverEmail != nil {
Alamofire.request(APIHelper.BASE_URL + APIHelper.API.ADD_DRIVERS.rawValue, method: .post, parameters: para2, encoding: JSONEncoding.default, headers: headers).responseJSON { (response) in
switch response.result {
case .success:
let json = response.result.value as? NSDictionary
let code = json!["code"]
completion(code as? Int)
case .failure(let error):
print(error)
completion(nil)
return
}
}
}
}
Thanks in advance

Answer 1

This question is screaming Codable protocol at me, so here it goes. The Codable protocol makes using true Swift objects to generate JSON a real breeze. Try this in a Playground:
import Cocoa
struct Car : Codable {
let id:Int
let drivers:[String] // you will want to improve on this
}
struct Mobiles : Codable {
let cars:[Car]
}
var mobiles = Mobiles(cars:[Car(id:126, drivers:["xxx#gmail.com", "sss#gmail.com"]),
Car(id:128, drivers:["mmm#gmail.com"])])
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
print(String(data:try encoder.encode(mobiles), encoding:.utf8)!)
Since you should be able to employ Swift on both ends of this equation it is easy to see that this requires a lot less code than your example.

Answer 2

As you said in the Json example you have a array of dictionaries in 'Cars' field but you are making a dictionary inside a dictionary in this line:
var para2 = [String : [[String : Any]]]()
You can define your para2 in this way:
var para2 = [String, Array<[String:Any]>]
and then send it as a parameters