Adding an array of Json Data to Realm - ios

Question

I'm making an app for airports and I'm getting an array of data from one api, like so:
"data":[
{"id":"001","code":"ABZ","name":"Aberdeen","country":"United Kingdom"},
{"id":"002","code":"AUH","name":"Abu Dhabi","country":"United Arab Emirates"},
.
.
.
]
AND :
"airports":[
{"from":"001",
"to":["1","3","11","13","12","20","23","27","29","31","33"]
},
.
.
.
]
I have created realm model classes:
class AirportsDataRealm: Object {
#objc dynamic var name: String = ""
#objc dynamic var id: Int = 0
#objc dynamic var code: String = ""
#objc dynamic var country: String = ""
override static func primaryKey() -> String? {
return "id"
}
}
class AirportsFromToRealm: Object {
#objc dynamic var fromID: Int = 0
var toID = List<Int>()
override static func primaryKey() -> String? {
return "fromID"
}
}
now I want to save it into realm, I'm using swiftyJSON and I have used for-loop to do it and it is working fine but I think it's taking long time since the array is very long, here is what I've done:
// Airports Data
let countData = json["data"].count
for i in 0...countData - 1{
let airportsDataModel = AirportsDataRealm()
airportsDataModel.code = json["data"][i]["code"].stringValue
airportsDataModel.name = json["data"][i]["name"].stringValue
airportsDataModel.country = json["data"][i]["country"].stringValue
airportsDataModel.id = Int(json["data"][i]["id"].stringValue)!
try! realm.write {
realm.add(airportsDataModel, update: true)
}
}
//Airports FROM-TO
let countFromTo = json["airports"].count
for i in 0...countFromTo - 1{
let fromToDataModel = AirportsFromToRealm()
fromToDataModel.fromID = Int(json["airports"][i]["from"].stringValue)!
let arrayTo = json["airports"][i]["to"].arrayValue.map{ $0.intValue }
fromToDataModel.toID.append(objectsIn: arrayTo)
try! realm.write {
realm.add(fromToDataModel, update: true)
}
}
is there any way to save the whole array in realm in one shot without for-loop?
P.S
"there should be a relation between the two tables because each from 'id' has a list of 'to' id's and the id's are from the data table, for now I managed to create this relations when fetching the data using filters ,, so just ignore this"
Thank you

Answer 1

Simply use map method,
First I needed to add initializers to my object classes and pass json array as a parameter, like so:
class AirportsDataRealm: Object {
#objc dynamic var name: String = ""
#objc dynamic var id: Int = 0
#objc dynamic var code: String = ""
#objc dynamic var country: String = ""
convenience required init(withJSON json : JSON) {
self.init()
self.name = json["name"].stringValue
self.id = json["id"].intValue
self.code = json["code"].stringValue
self.country = json["country"].stringValue
}
override static func primaryKey() -> String? {
return "id"
}
}
class AirportsFromToRealm: Object {
#objc dynamic var fromID: Int = 0
var toID = List<Int>()
convenience required init(withJSON json : JSON) {
self.init()
self.fromID = json["from"].intValue
let toArray = json["to"].arrayValue.map{ $0.intValue }
self.toID.append(objectsIn: toArray)
}
override static func primaryKey() -> String? {
return "fromID"
}
}
Then by using map method the code will look like this:
func updateAirport(json: JSON) {
// Airports Data
let airportsData : [AirportsDataRealm]
let airportsDataJsonArray = json["data"].array
airportsData = airportsDataJsonArray!.map{AirportsDataRealm(withJSON: $0)}
//Airports FROM-TO
let airportsFromTo : [AirportsFromToRealm]
let airportsFromToJsonArray = json["airports"].array
airportsFromTo = airportsFromToJsonArray!.map{AirportsFromToRealm(withJSON: $0)}
//Write To Realm
try! realm.write {
realm.add(airportsData, update: true)
realm.add(airportsFromTo, update: true)
}
}
No for loops anymore ^_^