I am using the alamofire to get response JSON from server, then using ObjectMapper to map string to Realm object.
The realm object is:
class SolutionVideo: Object, Mappable {
dynamic var svID = 0
dynamic var solutionTitle = ""
dynamic var videoName = ""
dynamic var relatedInfo = ""
dynamic var shortDesc = ""
override static func primaryKey() -> String? {
return "svID"
}
required convenience init?(_ map: Map) {
self.init()
}
func mapping(map: Map) {
svID <- map["svID"]
solutionTitle <- map["solutionTitle"]
videoName <- map["videoName"]
relatedInfo <- map["relatedInfo"]
shortDesc <- map["shortDescription"]
}
}
The json string is:
[
{
"svID": "10",
"solutionTitle": "Video10",
"videoName": "Video10",
"realtedInfo": "",
"shortDescription": ""
},
{
"svID": "9",
"solutionTitle": "Video9",
"videoName": "Video9",
"realtedInfo": "",
"shortDescription": ""
}
]
in my viewController:
#IBAction func updateBtn(sender: AnyObject) {
// download file to update Realm
let url = "http://janicedemo.com/updates.json"
Alamofire.request(.GET, url).responseArray { (response: Response<[SolutionVideo], NSError>) in
let Array = response.result.value
print(Array)
if let Array = Array {
for video in Array {
let dbURL = Realm.Configuration.defaultConfiguration.fileURL
let realm = try! Realm(fileURL: dbURL!)
try! realm.write{
print("will save")
realm.add(video, update: true)
}
}
}
}
The problem is that I can add the object successfully. But the svID(primark key) keeps 0, instead of 10 or 9 (set in JSON). Is it because I have set default value to svID? Can someone gives me a hint? Thanks
Try
class SolutionVideo: Object, Mappable {
dynamic var svID = 0
dynamic var solutionTitle = ""
dynamic var videoName = ""
dynamic var relatedInfo = ""
dynamic var shortDesc = ""
func setCompoundID(id: Int) {
self.svID = svID
compoundKey = compoundKeyValue()
}
func setCompoundID(id: Int) {
self.solutionTitle = solutionTitle
compoundKey = compoundKeyValue()
}
func setCompoundID(id: Int) {
self.videoName = videoName
compoundKey = compoundKeyValue()
}
func setCompoundID(id: Int) {
self.relatedInfo = relatedInfo
compoundKey = compoundKeyValue()
}
func setCompoundID(id: Int) {
self.shortDesc = shortDesc
compoundKey = compoundKeyValue()
}
dynamic lazy var compoundKey: String = self.compoundKeyValue()
override static func primaryKey() -> String? {
return “compoundKey”
}
func compoundKeyValue() -> String {
return "\(svID)\(solutionTitle)\(videoName)\(relatedInfo)\(shortDesc)”
}
}
The main thing I can think of is that the primary key values are coming down as strings instead of proper integers (i.e., "10" instead of simply 10). It's possible that the mapper isn't smart enough to handle conversion of strings to integers, so it's just defaulting to 0.
According to the ObjectMapper documentation, you should be able to perform this conversion inline in your mapping function:
svID <- (map["svID"], TransformOf<Int, String>(fromJSON: { Int($0!) }, toJSON: { $0.map { String($0) } }))
Also, as a sidenote, I noticed that one of your JSON key names has a spelling error: "realtedInfo". So I'd recommend double-checking that works too. :)
Related
I am attempting to remove duplicate elements of my Transaction object. The Transactions are being loaded from Firestore and displayed onto a UTableView. I tried to follow this answer [here][1] however I got an error that budgetData is not hashable. Is there a way I can remove duplicate Transactions that have the same "transId" and return an updated array of budgetdata?
var budgetData: [Transaction] = []
func loadCatTransactions(){
if let catId = self.categoryId{
guard let user = Auth.auth().currentUser?.uid else { return }
print("userFromLoadChat::\(user)")
db.collection("users").document(user).collection("Transactions")
.whereField("catId", isEqualTo: catId)
.getDocuments() {
snapshot, error in
if let error = error {
print("\(error.localizedDescription)")
} else {
self.budgetData.removeAll()
for document in snapshot!.documents {
let data = document.data()
let title = data["name"] as? String ?? ""
let date = data["date"] as? String ?? ""
let amount = data["amount"] as? Double ?? 0
let id = data["transId"] as? String ?? ""
let trans = Transaction(catId:catId,title: title, dateInfo: date, image: UIImage.groceriesIcon, amount: amount)
self.budgetData.append(trans)
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
}
}
}
func uniq<S : Sequence, T : Hashable>(source: S) -> [T] where S.Iterator.Element == T {
var buffer = [T]()
var added = Set<T>()
for elem in source {
if !added.contains(elem) {
buffer.append(elem)
added.insert(elem)
}
}
return buffer
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.budgetData.count
}
struct Transaction {
var catId : String? = nil
var title: String
var dateInfo: String
var image: UIImage
var amount: Double
var annualPercentageRate: Double?
var trailingSubText: String?
var uid: String?
var outOfString: String?
var category: String?
var dictionary:[String:Any]{
return [
"title": title,
"dateInfo":dateInfo,
"amount":amount,
"annualPercentageRate":annualPercentageRate,
"trailingSubText":trailingSubText,
"uid": uid,
"outOfString": outOfString,
"category": category
]
}
}
[1]: Removing duplicate elements from an array in Swift
You need to make Transaction object Hashable. Try this
struct Transaction{
var transId: String
}
extension Transaction: Hashable{
static func ==(lhs: Transaction, rhs: Transaction) -> Bool {
return lhs.transId == rhs.transId
}
}
var budgetData = [Transaction(transId: "a"), Transaction(transId:"c"),
Transaction(transId: "a"), Transaction(transId: "d")]
var tranSet = Set<Transaction>()
budgetData = budgetData.filter { (transaction) -> Bool in
if !tranSet.contains(transaction){
tranSet.insert(transaction)
return true
}
return false
}
I'm new to the Firebase realtime database and relatively new to Swift in general. I am attempting to build a song request app in which users can create events for guests to request songs from the Spotify API. I'm trying to write an Event object to Firebase, which contains nested objects and arrays of different types. However, when it writes to the database, it only writes the strings and none of the arrays or objects. What is the best way to write all this information to the Firebase Database in a nested structure, so that whenever users add song requests, I can edit the array of requests for the given event in firebase.
Here is my code:
Event.swift
struct Event: Codable{
var code: String
var name: String
var host: String
var description: String
var hostUserId: String
var guestIds: [String]
var requests: [Request]
var queue: [Request]
var played: [Request]
//private var allowExplicit: Bool
//private var eventLocation
init(code: String, name: String, host: String, description: String, hostUserId: String){
self.code = code
self.name = name
self.host = host
self.description = description
self.hostUserId = hostUserId
self.guestIds = []
self.requests = []
self.queue = []
self.played = []
}
func toAnyObject() -> Any{
var guestIdsDict: [String:String] = [:]
for id in guestIds{
guestIdsDict[id] = id
}
var requestsDict: [String: Any] = [:]
for request in requests{
requestsDict[request.getId()] = request.toAnyObject()
}
var queueDict: [String: Any] = [:]
for request in queue{
queueDict[request.getId()] = request.toAnyObject()
}
var playedDict: [String: Any] = [:]
for request in played{
playedDict[request.getId()] = request.toAnyObject()
}
return [
"code": code,
"name": name,
"host": host,
"description": description,
"hostUserId": hostUserId,
"guestIds": guestIdsDict,
"requests": requestsDict,
"queue":queueDict,
"played":playedDict
]
}
}
Request.swift
struct Request: Codable{
private var name: String
private var id: String
private var explicit: Bool
private var album: Album
private var artists: [Artist]
private var likes: Int
init(name: String, id: String, explicit: Bool, album: Album, artists: [Artist]){
self.name = name
self.id = id
self.explicit = explicit
self.album = album
self.artists = artists
self.likes = 1
}
func toAnyObject() -> Any{
var artistsDict: [String:Any] = [:]
for artist in artists {
artistsDict[artist.id] = artist.toAnyObject()
}
return [
"name": name,
"id": id,
"explicit": explicit,
"album": album.toAnyObject(),
"artists": artistsDict,
"likes": likes
]
}
mutating func like(){
self.likes += 1
}
mutating func unlike(){
self.likes -= 1
if(self.likes < 0){
self.likes = 0
}
}
mutating func setLikes(count: Int){
self.likes = count
}
func getLikes() -> Int{
return self.likes
}
func getName() -> String{
return self.name
}
func getId() -> String{
return self.id
}
func getExplicit() -> Bool{
return self.explicit
}
func getAlbum() -> Album {
return self.album
}
func getImages() -> [Image] {
return self.album.images
}
func getArtists() -> [Artist] {
return self.artists
}
func getArtistString() -> String{
var artistString = ""
for (i, artist) in self.artists.enumerated(){
artistString += artist.name
if(i != self.artists.endIndex-1){
artistString += ", "
}
}
return artistString
}
}
Album.swift
struct Album: Codable{
let name: String
let images: [Image]
func toAnyObject() -> Any{
var imagesDict: [String: Any] = [:]
for image in images{
imagesDict[image.url] = image.toAnyObject()
}
return [
"name": name,
"images": imagesDict
]
}
}
Artist.swift
struct Artist: Codable{
let id: String
let name: String
func toAnyObject() -> Any{
return ["id": id, "name": name]
}
}
Image.swift
struct Image: Codable{
let height: Int
let url: String
let width: Int
func toAnyObject() -> Any{
return ["height": height, "url": url, "width": width]
}
}
As you are using Codable, you can create a dic out of it as follows:
Step 1: Add this extension to your code
extension Encodable {
var dictionary: [String: Any]? {
guard let data = try? JSONEncoder().encode(self) else { return nil }
return (try? JSONSerialization.jsonObject(with: data, options: .allowFragments)).flatMap { $0 as? [String: Any] }
}
}
Step 2: Write below code in your Struct (this you have to do in every struct or you can modify code as per your need).
func createDic() -> [String: Any]? {
guard let dic = self.dictionary else {
return nil
}
return dic
}
Now with the help of struct obj, call createDic() method and you will get a dictionary.
And you can send this dictionary to the firebase.
FULL CODE EXAMPLE:
extension Encodable {
var dictionary: [String: Any]? {
guard let data = try? JSONEncoder().encode(self) else { return nil }
}
struct LoginModel: Codable {
let email: String
let password: String
func createDic() -> [String: Any]? {
guard let dic = self.dictionary else {
return nil
}
return dic
}
}
Please comment if you have any questions.
Happy to help!
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 ^_^
I am facing an issue where I am unable to keep existing relationships after calling add(_, update: true) function.
I wrote a TaskSync class that is responsible for creating/updating Task objects:
class TaskSync: ISync {
typealias Model = Task
func sync(model: Task) {
let realm = try! Realm()
let inWrite = realm.isInWriteTransaction
if !inWrite {
realm.beginWrite()
}
let _task = realm.object(ofType: Task.self, forPrimaryKey: model.id)
// Persist matches as they are not getting fetched with the task
if let _task = _task {
print("matches: \(_task.matches.count)")
model.matches = _task.matches
}
realm.add(model, update: true)
if _task == nil {
var user = realm.object(ofType: User.self, forPrimaryKey: model.getUser().id)
if (user == nil) {
user = model.getUser()
realm.add(user!, update: true)
}
user!.tasks.append(model)
}
if !inWrite {
try! realm.commitWrite()
}
}
func sync(models: List<Task>) {
let realm = try! Realm()
try! realm.write {
models.forEach { task in
sync(model: task)
}
}
}
}
When a model is to be synced, I check if it already exists in the Realm and if so, I fetch it and try to include the matches property as this one is not included in the model.
Right before the call realm.add(model, update: true), model contains list of matches, however right after the realm.add is executed, the matches list is empty.
Here are the two models:
class Task: Object, ElementPreloadable, ElementImagePreloadable, ItemSectionable {
dynamic var id: Int = 0
dynamic var title: String = ""
dynamic var desc: String = ""
dynamic var price: Float = 0.0
dynamic var calculatedPrice: Float = 0.0
dynamic var location: String = ""
dynamic var duration: Int = 0
dynamic var date: String = ""
dynamic var category: Category?
dynamic var currency: Currency?
dynamic var longitude: Double = 0.0
dynamic var latitude: Double = 0.0
dynamic var state: Int = 0
dynamic var userId: Int = 0
// Existing images
var imagesExisting = List<URLImage>()
// New images
var imagesNew = List<Image>()
// Images deleted
var imagesDeleted = List<URLImage>()
private let users = LinkingObjects(fromType: User.self, property: "tasks")
var user: User?
var matches = List<Match>()
dynamic var notification: Notification?
override static func ignoredProperties() -> [String] {
return ["imagesExisting", "imagesNew", "imagesDeleted", "user", "tmpUser"]
}
override static func primaryKey() -> String? {
return "id"
}
func getImageMain() -> URLImage? {
for image in imagesExisting {
if image.main {
return image
}
}
return imagesExisting.first
}
func getSection() -> Int {
return state
}
func getSectionFieldName() -> String? {
return "state"
}
func getId() -> Int {
return id
}
func getURL() -> URL? {
if let image = getImageMain() {
return image.getResizedURL()
}
return nil
}
func getState() -> TaskOwnState {
return TaskOwnState(rawValue: state)!
}
func getUser() -> User {
return (user != nil ? user : users.first)!
}
}
class Match: Object, ElementPreloadable, ElementImagePreloadable, ItemSectionable {
dynamic var id: Int = 0
dynamic var state: Int = -1
dynamic var priorityOwnRaw: Int = 0
dynamic var priorityOtherRaw: Int = 0
dynamic var user: User!
var messages = List<Message>()
private let tasks = LinkingObjects(fromType: Task.self, property: "matches")
var task: Task?
dynamic var notification: Notification?
override static func primaryKey() -> String? {
return "id"
}
override static func ignoredProperties() -> [String] {
return ["task"]
}
func getId() -> Int {
return id
}
func getSection() -> Int {
return 0
}
func getURL() -> URL? {
if let image = user.getImageMain() {
return image.getResizedURL()
}
return nil
}
func getPriorityOwn() -> PriorityType {
if priorityOwnRaw == PriorityType.normal.rawValue {
return PriorityType.normal
}
else {
return PriorityType.favorite
}
}
func getPriorityOther() -> PriorityType {
if priorityOtherRaw == PriorityType.normal.rawValue {
return PriorityType.normal
}
else {
return PriorityType.favorite
}
}
func getSectionFieldName() -> String? {
return nil
}
func getTask() -> Task {
return (task != nil ? task : tasks.first)!
}
}
I spent hours trying to figure out why I am unable to keep the matches relationship when updating the task. Every advice will be highly appreciated!
This question was also asked upon Realm's GitHub issue tracker. For posterity, here is the solution.
List properties should always be declared as let properties, as assigning to them does not do anything useful. The correct way to copy all objects from one List to another is model.tasks.append(objectsIn: _user.tasks).
I have the main model of ChatConversationModel, which has an array property userAcitivities that is an array of ChatUserAcitivityModel objects. I want to get from Realm the ChatConversationModel object in which the userAcitivities contains the given friendID. I've tried a few different ways but haven't been able to get the result I'm after.
import Foundation
import RealmSwift
import ObjectMapper
class ChatConversationModel: Object, Mappable {
dynamic var id = ""
dynamic var typeIndex = ChatTypes.ChatType.oneToOne.index
var userAcitivities = List<ChatUserAcitivityModel>()
override class func primaryKey() -> String? {
return "id"
}
convenience required init?(map: Map) {
self.init()
}
func mapping(map: Map) {
if map.mappingType == .fromJSON {
id <- map["id"]
typeIndex <- map["typeIndex"]
userAcitivities <- (map["userAcitivities"], ListTransform<ChatUserAcitivityModel>())
} else {
id >>> map["id"]
typeIndex >>> map["typeIndex"]
userAcitivities >>> (map["userAcitivities"], ListTransform<ChatUserAcitivityModel>())
}
}
}
import Foundation
import RealmSwift
import ObjectMapper
class ChatUserAcitivityModel: Object, Mappable {
dynamic var userID = ""
/// This is necessary in order to know from what point to download the chat if the user deleted it.
/// If this property is 0.0, then there has never been a deletion.
dynamic var removedChatTimeStamp = 0.0
override class func primaryKey() -> String? {
return "userID"
}
convenience required init?(map: Map) {
self.init()
}
func mapping(map: Map) {
if map.mappingType == .fromJSON {
userID <- map["userID"]
removedChatTimeStamp <- map["removedChatTimeStamp"]
} else {
userID >>> map["userID"]
removedChatTimeStamp >>> map["removedChatTimeStamp"]
}
}
}
func getFriendChatConversationModel(_ friendID: String) {
let realm = try! Realm()
let chatConversationModels = realm.objects(ChatConversationModel.self).filter("typeIndex = %#", ChatTypes.ChatType.oneToOne.index)
let friend = chatConversationModels.filter { $0.userAcitivities.filter { $0.userID == friendID } }
}
At the moment I'm doing the following and it's working for me, but I'd like to find the best way to express this:
func getFriendChatConversationModel(_ friendID: String) -> ChatConversationModel? {
let realm = try! Realm()
let chatConversationModels = realm.objects(ChatConversationModel.self).filter("typeIndex = %#", ChatTypes.ChatType.oneToOne.index)
var friendChatConversationModel: ChatConversationModel?
for chatConversationModel in chatConversationModels {
if chatConversationModel.userAcitivities.contains(where: { (chatUserAcitivityModel) -> Bool in
chatUserAcitivityModel.userID == friendID
}) {
friendChatConversationModel = chatConversationModel
return friendChatConversationModel
}
}
return nil
}
If I understand correctly, I think a query like this will do what you're after:
func getFriendChatConversationModel(_ friendID: String) -> ChatConversationModel? {
let realm = try! Realm()
let chatConversationModels = realm.objects(ChatConversationModel.self).filter("typeIndex = %#", ChatTypes.ChatType.oneToOne.index)
return chatConversationModels.filter("ANY userAcitivities.userID == %#", friendID).first
}