Swift iOS how to handle JSON nested array in object class?-CodePudding

I would like to create a Swift TableView for all available sizes of coffee within a specific type. With this JSON tree, how can you structure the class to create an array for the type specific sizes?

The JSON Tree is structured as follows:

{
 "_id": "60ba1ab72e35f2d9c786c610",
 "types": [
   {
     "_id": "60ba1a062e35f2d9c786c56d",
     "name": "Ristretto",
     "sizes": [
       "60ba18d13ca8c43196b5f606",
       "60ba3368c45ecee5d77a016b"
     ],
     "extras": [
       "60ba197c2e35f2d9c786c525"
     ]
   },
   {
     "_id": "60be1db3c45ecee5d77ad890",
     "name": "Espresso",
     "sizes": [
       "60ba3368c45ecee5d77a016b",
       "60ba33dbc45ecee5d77a01f8"
     ],
     "extras": [
       "60ba34a0c45ecee5d77a0263"
     ]
   },
   {
     "_id": "60be1eabc45ecee5d77ad960",
     "name": "Cappuccino",
     "sizes": [
       "60ba18d13ca8c43196b5f606",
       "60ba3368c45ecee5d77a016b",
       "60ba33dbc45ecee5d77a01f8"
     ],
     "extras": [
       "60ba197c2e35f2d9c786c525",
       "60ba34a0c45ecee5d77a0263"
     ]
   }
 ],
 "sizes": [
   {
     "_id": "60ba18d13ca8c43196b5f606",
     "name": "Large",
     "__v": 0
   },
   {
     "_id": "60ba3368c45ecee5d77a016b",
     "name": "Venti"
   },
   {
     "_id": "60ba33dbc45ecee5d77a01f8",
     "name": "Tall"
   }
 ],
 "extras": [
   {
     "_id": "60ba197c2e35f2d9c786c525",
     "name": "Select the amount of sugar",
     "subselections": [
       {
         "_id": "60ba194dfdd5e192e14eaa75",
         "name": "A lot"
       },
       {
         "_id": "60ba195407e1dc8a4e33b5e5",
         "name": "Normal"
       }
     ]
   },
   {
     "_id": "60ba34a0c45ecee5d77a0263",
     "name": "Select type of milk",
     "subselections": [
       {
         "_id": "611a1adeff35e4db9df19667",
         "name": "Soy"
       },
       {
         "_id": "60ba348d8c75424ac5ed259e",
         "name": "Oat"
       },
       {
         "_id": "60ba349a869d7a04642b41f4",
         "name": "Cow"
       }
     ]
   }
 ]
}

My classes: (I can currently load a TableView with the coffee sizes, but not the type specific sizes)

import Foundation
import UIKit

class Types: Codable {
    let types: [CoffeeType]
    
    init(types: [CoffeeType]) {
        self.types = types
    }
}

class Sizes: Codable {
    let sizes: [CoffeeType]
    
    init(sizes: [CoffeeType]) {
        self.sizes = sizes
    }
}

class CoffeeType: Codable {
    let _id: String
    let name: String
    
    init(_id: String, name: String) {
        self._id = _id
        self.name = name
        
    }
}

The app is structured like this: HomeViewController is a TableView of Types. When you click on a Type, you transition to SelectSizeViewController, to which I have already assigned a Type through the segue. On SelectSizeViewController, I would like to display the list of specific sizes.

CodePudding user response：

use QuickType to get the model this is quite helpful. you will be getting the model easily(suggestion). I think you are using the wrong model.

if your Base model struct is correct it should be something like this

struct Coffie: Codable {
let id: String
let types: [TypeElement]
let sizes: [Size]
let extras: [Extra]

enum CodingKeys: String, CodingKey {
    case id
    case types, sizes, extras
}
}

from here itself you can get the type and sizes with corresponded id's you can filter size values from sizes array