Pfthb

So I'm trying to parse JSON that looks something like this using Codable in Swift.

"abilities": [
 
 "ability": 
 "name": "chlorophyll",
 "url": "https://pokeapi.co/api/v2/ability/34/"
 ,
 "is_hidden": true,
 "slot": 3
 ,
 
 "ability": 
 "name": "overgrow",
 "url": "https://pokeapi.co/api/v2/ability/65/"
 ,
 "is_hidden": false,
 "slot": 1
 
],
"name": "SomeRandomName"

Now it gets confusing when you're trying to get nested data. Now I'm trying to get the name, which is easy. I'm also trying to get the ability name, this is where its gets complicated for me. After some research this is what I came up with.

class Pokemon: Codable 

struct Ability: Codable 
 var isHidden: Bool

 struct AbilityObject: Codable 
 var name: String
 var url: String
 

 var ability: AbilityObject

 private enum CodingKeys: String, CodingKey 
 case isHidden = "is_hidden"
 case ability
 


var name: String
var abilities: [Ability]

Now is there any better way in doing this, or am I stuck doing it like this.

Grab your JSON response and dump it in this site.

It'll generate these structs without Codable. Add Codable so they look like this:

struct Pokemon: Codable 
 let abilities: [AbilityElement]
 let name: String

 struct AbilityElement: Codable 
 let ability: Ability
 let isHidden: Bool
 let slot: Int

 struct Ability: Codable 
 let name: String
 let url: String
 
 

For keys with snake_case, you can just declare a JSONDecoder and specify the keyDecodingStrategy as .convertFromSnakeCase. No need to muck around with coding keys if you're just converting from snake case. You only need them if you're renaming keys.

If you have other situations where you need to create custom coding keys for your responses or alter key names, this page should prove helpful.

You can dump this in a playground and play around with it:

let jsonResponse = """

 "abilities": [
 
 "ability": 
 "name": "chlorophyll",
 "url": "https://pokeapi.co/api/v2/ability/34/"
 ,
 "is_hidden": true,
 "slot": 3
 ,
 
 "ability": 
 "name": "overgrow",
 "url": "https://pokeapi.co/api/v2/ability/65/"
 ,
 "is_hidden": false,
 "slot": 1
 
 ],
 "name": "SomeRandomName"

"""

struct Pokemon: Codable 
 let abilities: [AbilityElement]
 let name: String

 struct AbilityElement: Codable 
 let ability: Ability
 let isHidden: Bool
 let slot: Int

 struct Ability: Codable 
 let name: String
 let url: String
 
 


var pokemon: Pokemon?

do 
 let jsonDecoder = JSONDecoder()
 jsonDecoder.keyDecodingStrategy = .convertFromSnakeCase
 if let data = jsonResponse.data(using: .utf8) 
 pokemon = try jsonDecoder.decode(Pokemon.self, from: data)
 
 catch 
 print("Something went horribly wrong:", error.localizedDescription)


print(pokemon)