How to get array of json value using Graphql in swift 4? - json

Question

I am using graphql for get the API values using Apollo. I have successfully downloaded schema.json and get the values from grpahql. but i can't get the values array of json values.
This is my sample response:
{
"data": {
"team_Dashboard": {
"activeMission": "Food Mission",
"currentMissionChallenges": [
{
"id": "123",
"title": "Challenge",
"estTime": "5",
"location": "Anywhere",
"maxPts": "30",
"status": "Not yet started"
},
{
"id": "1234",
"title": " II Challenge",
"estTime": "5",
"location": "Anywhere",
"maxPts": "70",
"status": "Not yet started"
}
]
}
}
}
Graphql query:
query teamDashboard($teamId: ID!) {
team_Dashboard(teamId: $teamId) {
activeMission
currentMissionChallenges
}
}
Graphql schema response:
missionDeadLine: String
currentMissionChallenges: [JSON]
When i add the currentMissionChallenges([JSON]) in my Graphql query get error response from the server. but When i remove currentMissionChallenges from Graphql query, get success response and values from the server.
The problem is currentMissionChallenges is [JSON] format. When i change my graphql query This is graphql Response
query teamDashboard($teamId: ID!) {
team_Dashboard(teamId: $teamId) {
activeMission
currentMissionChallenges {
id
title
estTime
location
maxPts
status
}
}
}
Following error display in dashBord.grpahql
Field "currentMissionChallenges" must not have a selection since type "[JSON]" has no subfields.
How can i get the json array values from graphql. what is problem for getting Json Values? Please help me!

Answer 1

The best thing about GraphQL is we can use the query as model
Because the response would be as same as the query, so better we can assign the response to a variable of Query type.
Let me explain with an example:-
Suppose if I need to query about my profile data,
Profile.graphql
query MyProfile{
player {
me {
id
secret
name
email
state
country
timezone
picture
pictureType
audio
rank
}
}
countries{
value
viewValue
}
}
Once we'll build the app, it'll create MyProfileQuery in API.swift. In viewController we can use the response as below-
var myProfileData: MyProfileQuery.Data.Player.Me? // Declaring the valiable of player Type
ApolloClientManager.sharedInstance
.fetchQuery(MyProfileQuery(), showLoader: true,
viewController: self) { (response) in // Fetching response using Apollo Client Manager
if let allData = response {
if let profiledata = allData.player?.me {
self.myProfileData = profiledata // Assigning response into the variable declared
self.myEdittingProfileData = profiledata
self.updateUI()
}
if let countryData = allData.countries {
self.allCountrydata = countryData
self.getPickerDataForState(comppletion: {
self.openTimeZonePicker(completion: {
print("got timeZone Data")
})
})
}
}
}
Now we have response into the myProfileData variable which we can use
as follows -
Now we can access all the values we have mentioned in our query as below
print("player id is- \(myProfileData?.id)")
print("player name is- \(myProfileData?.name)")
print("player email is- \(myProfileData?.email)")
print("player state is- \(myProfileData?.state)")
print("player rank is- \(myProfileData?.rank)")
print("player pictureType is- \(myProfileData?.pictureType)")
// player id is- 10
// player name is- jordan
// player email is- jordan#domain.com
// player state is- Ohio
// player rank is- 101
// player pictureType is- custome
//
Hope this will help you out 👍👍👍

Answer 2

i suggest you use custom scalar.
import Apollo
public typealias JSON = [String: Any]
extension Dictionary: JSONDecodable {
public init(jsonValue value: JSONValue) throws {
if let array = value as? NSArray {
self.init()
if var dict = self as? [String: JSONDecodable & JSONEncodable] {
dict["data"] = array as! [[String: Any]]
self = dict as! Dictionary<Key, Value>
return
}
}
guard let dictionary = value as? Dictionary else {
throw JSONDecodingError.couldNotConvert(value: value, to: Dictionary.self)
}
self = dictionary
}
}
var currentMissionChallanges = [JSON]()
func getTeamDashboard(id:String) {
let query = TeamDashboardQuery(id:id)
apollo.fetch(query:query) { [weak self] result, error in
if let dashboards = result.data?.team_dashboard {
if let array = dashboards!["currentMissionChallanges"] as?
[JSON] {
self?.currentMissionChallanges = array
}
}
}
}