I created an Person object when the User logs in:
let creds = SyncCredentials.jwt(accessToken)
SyncUser.logIn(with: creds, server: Constants.syncAuthURL, onCompletion: { [weak self](user, err) in
if let user = user {
self?.setDefaultRealmConfiguration(with: user)
let realm = try! Realm()
let identity = (user.identity)!
let person = Person()
person.id = identity
try! realm.write {
realm.add(person, update: true)
}
self?.performSegue(withIdentifier: "showProfile", sender: self)
}
})
The Person successfully created on the cloud server.
In the next viewcontroller i like to fetch the object based on the id:
let realm = try! Realm()
guard let uuid = SyncUser.current?.identity! else { return }
let person = realm.objects(Person.self).filter("id = %#", uuid).first
try! realm.write {
person?.name = "test"
}
The person is always nil I also tried the query the object with the primary key, but with no success.
The Person class looks like:
class Person : Object {
#objc dynamic var id = ""
#objc dynamic var created: Date = Date()
#objc dynamic var name = ""
#objc dynamic var email = ""
#objc dynamic var avatar : Data?
override static func primaryKey() -> String? {
return "id"
}
}
UPDATE
I created a new app with just one Viewcontroller and the Person class:
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let creds = SyncCredentials.usernamePassword(username: "admin", password: "test")
SyncUser.logIn(with: creds, server: Constants.AUTH_URL, onCompletion: { (user, err) in
if let user = user {
var config = user.configuration(realmURL: Constants.REALM_URL)
config.objectTypes = [Person.self]
Realm.asyncOpen(configuration: config, callback: { (realm, error) in
guard let realm = realm else {return}
let objects = realm.objects(Person.self)
print(objects) // always empty why???
try! realm.write {
let p = Person()
p.id = "test"
realm.add(p)
}
print(objects) // one object
})
}
})
}
}
as with my other problem the person is successfully added to the cloud. but when I restart the app the objects are empty on the first query. Maybe I miss understanding something with the synched realms?
let results = realm.objects(Person.self)
let subscription = results.subscribe()
print(results)
resolve my problem
Related
My swift code below when loaded places 3 items in the core data entity named "UserName". When the user enters a number into textfield enterT I want the label labelName to display it. So when the user enters 1 the label should display jessica biel because Jesical Biel is the first name entered. Someone stated the suggestion below to solve this problem. I dont know exactly how to do this.I have added a gif below.
Convert the entered number to Int. If this succeeds pass the integer to joke and fetch the record matching the idx attribute.
https://github.com/redrock34/index-fetch
import UIKit
import CoreData
class ViewController: UIViewController,UITextFieldDelegate {
#IBOutlet var labelName : UILabel!
#IBOutlet var enterT : UITextField!
lazy var context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
override func viewDidLoad() {
super.viewDidLoad()
openDatabse()
fetchData()
enterT.delegate = self
}
func textFieldDidEndEditing(_ textField: UITextField) {
guard let index = Int(textField.text!) else {
// display an alert about invalid text
return
}
joke(at: index - 1)
}
func joke(at index : Int) {
let fetchRequest = NSFetchRequest<Users>(entityName: "Users")
fetchRequest.predicate = NSPredicate(format: "idx == %d", Int32(index))
do {
if let user = try context.fetch(fetchRequest).first {
labelName.text = user.username
}
} catch {
print("Could not fetch \(error) ")
}
}
func openDatabse()
{
let names = ["kim kardashian", "jessica biel", "Hailey Rienhart"]
for i in 0..<names.count {
let newUser = Users(context: context)
newUser.username = names[i]
newUser.idx = Int32(i + 1)
}
print("Storing Data..")
do {
try context.save()
} catch {
print("Storing data Failed", error)
}
}
func fetchData()
{
print("Fetching Data..")
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Users")
request.returnsObjectsAsFaults = false
do {
let result = try context.fetch(request)
for data in result as! [NSManagedObject] {
let userName = data.value(forKey: "username") as! String
print("User Name is : "+userName)
}
} catch {
print("Fetching data Failed")
}
}}
Of course you have to assign values to the idx attribute and you have to assign the result of the fetch to the label.
First replace
let appDelegate = UIApplication.shared.delegate as! AppDelegate //Singlton instanc
var context:NSManagedObjectContext!
with
lazy var context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
Then replace both openDatabse and saveData with
func openDatabse()
{
let names = ["kim kardashian", "jessica biel", "Hailey Rienhart"]
for i in 0..<names.count {
let newUser = Users(context: context)
newUser.name = names[i]
newUser.idx = Int32(i + 1)
}
print("Storing Data..")
do {
try context.save()
} catch {
print("Storing data Failed", error)
}
}
Finally add a line in joke to display the value
func joke(at index : Int) {
let fetchRequest = NSFetchRequest<Users>(entityName: "Users")
fetchRequest.predicate = NSPredicate(format: "idx == %d", Int32(index))
do {
if let user = try context.fetch(fetchRequest).first {
labelName.text = user.username
}
} catch {
print("Could not fetch \(error) ")
}
}
It creates the records and assigns the proper indexes. Then entering a number in the text field should work.
But – once again – on each launch of the app the 3 records are inserted again with the same names and indexes. Be aware of that!
I am trying to read data from media when data is updated on /media node, but .observe(.childAdded is not called.
For example, I update data at /media/-LKN1j_FLQuOvnhEFfao/caption , but I never receive the event in observeNewMedia .
I can read the data with no problem the first time when ViewDidLoad completes.
The first step is to download the user data, second is to get the locality from currentUser and the last step is to attach a listener .childAdded on media.
I suspect that the event is not triggered because fetchMedia is called inside DDatabaseRReference.users(uid: uid).reference().observe(.value
media
-LKNRdP4ZsE3YrgaLB30
caption: "santa"
mediaUID: "-LKNRdP4ZsE3YrgaLB30"
locality: "barking"
users
Q6Dm3IMLNLgBH3ny3rv2CMYf47p1
media
-LKNReJCxgwtGRU6iJmV: "-LKNRdP4ZsE3YrgaLB30"
email: "john#gmail.com"
locality: "barking"
//enables the programmer to create references to different childs in Firebase
enum DDatabaseRReference {
case root
case users(uid:String)
case media //to store photos
func reference() -> DatabaseReference {
return rootRef.child(path)
}
//return root reference to our database
private var rootRef: DatabaseReference {
return Database.database().reference()
}
private var path: String {
switch self { //self is the enum DDatabaseReference
case .root:
return ""
case .users(let uid):
return "users/\(uid)"
case .media:
return "media"
}
}
}//end of enum DatabaseReference
class NewsfeedTableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
//observe ~/users/uid
DDatabaseRReference.users(uid: uid).reference().observe(.value, with: { (snapshot) in
DispatchQueue.main.async {
if let userDict = snapshot.value as? [String : Any] {
self.currentUser = UserModel(dictionary: userDict)
self.fetchMedia()
self.tableView.reloadData()
}
}
})
}
func fetchMedia() {
Media.observeNewMedia((currentUser?.locality)!) { (newMedia) in
//check if newly downloaded media is already in media array
if !self.media.contains(newMedia) {
self.media.insert(newMedia, at: 0)
self.tableView.reloadData()
}else {
//remove old media and add the newly updated one
guard let index = self.media.index(of: newMedia) else {return}
self.media.remove(at: index)
self.media.insert(newMedia, at: 0)
self.tableView.reloadData()
}
}
}
}//end of NewsfeedTableViewController
class Media {
class func observeNewMedia(_ userLocality: String, _ completion: #escaping (Media) -> Void) {
DDatabaseRReference.media.reference().queryOrdered(byChild: "locality").queryEqual(toValue: userLocality).observe(.childAdded, with: { snapshot in
guard snapshot.exists() else {
print("no snap ")
return}
print("snap is \(snapshot)")
let media = Media(dictionary: snapshot.value as! [String : Any])
completion(media)
})
}
} //end of class Media
Let's first update the structure so make it more queryable
assume a users node
users
-Q6Dm3IMLNLgBH3ny3rv2CMYf47p1 //this is each users uid
email: "john#gmail.com"
locality: "barking"
and a media node that contains media for all users
media
-abcdefg12345 //node created with childByAutoId
caption: "santa"
for_uid: -Q6Dm3IMLNLgBH3ny3rv2CMYf47p1 //matches the uid in the /users node
Then our main viewController which contains a reference to Firebase and logs the user in
class ViewController: UIViewController {
var ref: DatabaseReference!
override func viewDidLoad() {
super.viewDidLoad()
self.ref = Database.database().reference()
//log user in which will populate the Auth.auth.currentUser variable
}
.
.
.
We need an object to store the media in and then an array to hold those objects
class MediaClass {
var key = ""
var caption = ""
init(k: String, c: String) {
self.key = k
self.caption = c
}
}
var mediaArray = [MediaClass]()
then set up the observers which will add, update or remove from the array when media for this user is added, changed or removed.
let thisUid = Auth.auth().currentUser?.uid
let mediaRef = self.ref.child("media")
let queryRef = mediaRef.queryOrdered(byChild: "for_uid").queryEqual(toValue: thisUid)
queryRef.observe(.childAdded, with: { snapshot in
let dict = snapshot.value as! [String: Any]
let key = snapshot.key
let caption = dict["caption"] as! String
let m = MediaClass.init(k: key, c: caption)
self.mediaArray.append(m)
self.tableView.reloadData()
})
queryRef.observe(.childChanged, with: { snapshot in
let dict = snapshot.value as! [String: Any]
let key = snapshot.key
let caption = dict["caption"] as! String
let index = self.mediaArray.index { $0.key == key } //locate this object in the array
self.mediaArray[index!].caption = caption //and update it's caption
self.tableView.reloadData()
})
//leaving this an an exercise
queryRef.observe(.childRemoved....
Note we added .childAdded, .childChanged and .childRemoved events to the media node via a query so the only events the app will receive are the ones that pertain to this user.
Also note there's no error checking so that needs to be added.
class User: Object {
#objc dynamic var id = ""
#objc dynamic var dateFirstStart:TimeInterval = 0
//dates
#objc dynamic var dateLastStart:TimeInterval = 0
#objc dynamic var dateLastAppClose:TimeInterval = 0
#objc dynamic var dateLastDataUpdateCheck:TimeInterval = 0
#objc dynamic var dateLastFilesUpdateCheck:TimeInterval = 0
override class func primaryKey() -> String? {
return "id"
}
}
Do I really have to create a function for each value to change? Like this:
func updateUserDateFirstStart(date:Date){
do {
let realm = try Realm()
try realm.write {
let user = getUser()
user. dateLastStart = Date().timeIntervalSince1970
}
} catch let error as NSError {
print("ERROR \(error.localizedDescription)")
}
}
What I want is something like
let user = getUser()
user.dateLastStart = Date().timeIntervalSince1970
dataManager.updateUser(user)
And in my DataManager:
func updateUser(user:User){
do {
let realm = try Realm()
try realm.write {
realm.add(user, update: true)
}
} catch let error as NSError {
print("ERROR \(error.localizedDescription)")
}
}
But if I do it as you can see in my wishtohave solution I always get an Attempting to modify object outside of a write transaction error.
I tried to create a complete new Object and use the id from the object I want to change. This works but would need even more lines of code.
You can use KVO to update one value in realm object
how to call
let user = getUser()
self.update(ofType:user, value: Date().timeIntervalSince1970 as AnyObject, key: "dateLastStart")
Helper func
func update(ofType:Object,value:AnyObject,key:String)->Bool{
do {
let realm = try Realm()
try realm.write {
ofType.setValue(value, forKeyPath: key)
}
return true
}catch let error as NSError {
fatalError(error.localizedDescription)
}
return false
}
this one for sending message and save it to realm db
var messageIndex = try! Realm().objects(MessageRealm.self).sorted(byKeyPath: "timeStamp")
func didPressSend(text: String) {
if self.inputContinerView.inputTextField.text! != "" {
let messageDB = MessageRealm()
let realm = try! Realm()
let userRealm = UsersRealm()
messageDB.textDownloadded = text
messageDB.fromId = user!.fromId
messageDB.timeStamp = Date()
print(messageDB)
try! realm.write ({
print(realm.configuration.fileURL)
userRealm.msgs.append(messageDB)
//realm.create(MessageRealm.self, value: ["textDownloadded": text, "fromId": user!.fromId, "timeStamp": Date()])
})
if let userTitleName = user?.toId {
print(userTitleName)
OneMessage.sendMessage(text, thread: "AAAWatree", to: userTitleName, isPhoto: false, isVideo: false, isVoice: false, isLocation: false, timeStamp: date, completionHandler: { (stream, message) in
DispatchQueue.main.async {
OneMessage.sharedInstance.deleteCoreDataMessage()
}
self.inputContinerView.inputTextField.text! = ""
})
}
}
}
This for when recieving message im trying to save user (send id )
let realm = try! Realm()
userData.sender = sender
userData.toId = toUser
print(userData.sender)
print(userData.toId)
try! realm.write ({
realm.add(userData, update: true)
})
this my Realm Object Class
class MessageRealm: Object {
dynamic var textDownloadded = String()
dynamic var imageDownloadded = NSData()
dynamic var videoDownloadded = String()
dynamic var voiceDownloadded = String()
dynamic var fromId = String()
dynamic var timeStamp = Date()
dynamic var messageId = NSUUID().uuidString
let userSelect = List<UsersRealm>()
override class func primaryKey() -> String? {
return "messageId"
}
}
class UsersRealm: Object {
dynamic var sender = String()
dynamic var fromId = String()
dynamic var toId = String()
dynamic var lastMessage = String()
dynamic var timeStamp = Date()
dynamic var profileImage = NSData()
let msgs = List<MessageRealm>()
override class func primaryKey() -> String {
return "sender"
}
}
sending and reciving is ok and its save to realm db but all any user send message i recived in one user i want to seprate for every user have his sending and recive database i miss something here but i dont know i try to search nothing its long question but i cant figure out the soluation
and sorry for my week english
Thank you
If I understood your case correctly you're using a single realm url for all users that's why all your clients have the same data. You should probably create a separate realm for the conversation and share it between the users who participate in that chat. Please learn more about sharing realms in our docs at https://realm.io/docs/swift/latest/#access-control.
Iv been converting my post Firebase 2 codebase to Firebase 3 and having some troubles.
So basically Im trying to figure out how I create a new user at a specific location on my Firebase DB.
Goal - I want to save all new users # var _USER_REF = FIRDatabaseReference().child("\(BASE_URL)/users")
Here is the code so far.
class DataService {
static let dataService = DataService()
let BASE_URL = "https://project-1321.firebaseio.com"
var _BASE_REF = FIRDatabaseReference().child(BASE_URL)
var _USER_REF = FIRDatabaseReference().child("\(BASE_URL)/users")
var _NEWS_REF = FIRDatabaseReference().child("\(BASE_URL)/news")
var _MARKET_STATS = FIRDatabaseReference().child("\(BASE_URL)/market")
var CURRENT_USER_REF: FIRDatabaseReference {
let userID = NSUserDefaults.standardUserDefaults().valueForKey("uid") as! String
let currentUser = FIRDatabaseReference().child("\(_BASE_REF)").child("users").child(userID)
//let currentUser = Firebase(url: "\(BASE_REF)").childByAppendingPath("users").childByAppendingPath(userID)
return currentUser
}
func createNewAccount(uid: String, user: Dictionary<String, String>) {
_USER_REF.child(uid).setValue(user)
}
}
View Controller
#IBAction func registerAccount(sender: AnyObject) {
guard let email = self.emailRegField.text where !self.emailRegField.text!.isEmpty else {
return
}
guard let username = self.usernameRegField.text where !self.usernameRegField.text!.isEmpty else {
return
}
guard let password = self.passwordRegField.text where !self.passwordRegField.text!.isEmpty else {
return
}
FIRAuth.auth()?.createUserWithEmail(email, password: password) {
(user, error) in
if error != nil {
print(error)
self.signUpErrorAlert("Alert", message: "There was a problem signing up!")
} else {
let user = ["provider": user?.providerID, "email": email, "username": username]
DataService.createNewAccount(user) // Doesnt Work
}
//Store UID in NSDefaults so if user reopen app they automatically log in if UID exsisits.
NSUserDefaults.standardUserDefaults().setValue(result ["uid"], forKey: "uid")
// Segue New User
self.performSegueWithIdentifier("newUserSegue", sender: nil)
}
// Loggin in a User who already has UID Saved to NSDefaults
When a user log's in or Registers I plan to save their "UID" to NSDefaults.
Then check like so :
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if NSUserDefaults.standardUserDefaults().valueForKey("uid") != nil {
self.performSegueWithIdentifier("newUserSegue", sender: nil)
} else {
print("User is not registered or has their UID saved to NSDefaults")
}
}
Is this a safe method?
#brkr In response to your comment above, you can still use the UIDs in order to add unique users to your Firebase database.
For example, here is your users ref (in the DataService Class):
let REF_USERS = FIRDatabase.database().referenceFromURL("\(URL_BASE)/users")
Now, create a user in Firebase 3.0:
FIRAuth.auth()!.createUserWithEmail(email, password: pwd, completion: { authData, error in
if error == nil {
// Log user in
FIRAuth.auth()?.signInWithEmail(email, password: pwd) { authData, error in
// Save user information to Firebase data
let user = // your user Dictionary
DataService.createNewAccount(authData!.uid, user: user)
}
} else {
// Handle login error here
}
})
The code for the create account method:
func createNewAccount(uid: String, user: Dictionary<String, String>) {
REF_USERS.child(uid).setValue(user)
}
I dont think it is necessary with new Firebase, look in the Dashboard, all your users should be under "Auth" tab,
Also this line doesnt make any sense in new Firebase, the URL you are querying is in the .plist you downloaded.
let BASE_URL = "https://project-1321.firebaseio.com" //remove this line
and use something like this
let firebaseRef = FIRDatabase.database().reference()
let newsRef = firebaseRef.child("news")
you can find many useful informations here https://firebase.google.com/docs/auth/ios/password-auth#sign_in_a_user_with_an_email_address_and_password