Cfrgtkky

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

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 ^_^