App Crashing with error:
FIRESTORE INTERNAL ASSERTION FAILED: Invalid document reference. Document references must have an even number of segments, but users_table has 1
I am trying to store like this:-
func updateFirestorePushTokenIfNeeded() {
if let token = Messaging.messaging().fcmToken {
let usersRef = Firestore.firestore().collection("users_table").document(userID)
usersRef.setData(["fcmToken": token], merge: true)
}
}
My firestore is empty right now.
That error message almost certainly means that userID is nil or empty. You should verify that you're passing the correct values to Firestore.
Related
when i run the following code i get this error.
['FIRESTORE INTERNAL ASSERTION FAILED: Invalid document reference. Document references must have an even number of segments, but User has 1']
func saveLabel(uid: String, label: String){
let userRef = db.collection("User").document(uid)
userRef.updateData(["label": label]) { (error) in
if error == nil {
print("updated")
}else{
print("not updated")
}
}
}
This error almost certainly means that uid is empty. You should log it to make sure.
How to check if firebase real time write operation was successful in ios?
I am trying to store data to real time database using the following code but it does not work:-
//adding the artist inside the generated unique key
refArtists.child(key!).setValue(data) { (error, dbreference) in
if error != nil{
print(error?.localizedDescription)
} else {
print("success", dbreference)
}
}
and I also tried following:-
let key = refArtists.childByAutoId().key
//creating artist with the given values
let artist = ["id":key,
"latitude": "34234" as String,
"longitude": "67657" as String
]
let data = ["data": artist]
refArtists.child(key!).setValue(data)
I am unable to understand why my write operation is unsuccessful.
Edit from comments:
The closure does not get called. I am getting this error :
Firebase Database connection was forcefully killed by the server. Will not attempt reconnect. Reason: Firebase error. Please ensure that you spelled the name of your Firebase correctly.
I tried several times with various ways to assign the collected values of documents from firestore into an array. Unfortunately, I could't find a way to solve this issue. I attached the code that I recently tried to implement. It includes before Firestore closure a print statement which print the whole fetched values successfully. However, after the closure and I tried to print the same array and the result is an empty array.
I tried to implement this code
var hotelCities: [String] = []
func getCities() {
db.collection("Hotels").getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
var found = false
let documentDetails = document.data() as NSDictionary
let location = documentDetails["Location"] as! NSDictionary
let city = location["city"]!
if (self.hotelCities.count == 0) {
self.hotelCities.append(String(describing: city))
}
else{
for item in self.hotelCities {
if item == String(describing: city){
found = true
}
}
if (found == false){
self.hotelCities.append(String(describing: city))
}
}
}
}
print(self.hotelCities)
}
print(self.hotelCities)
}
That's actually the expected result, since data is loaded from Firestore asynchronously.
Once you call getDocuments(), the Firestore client goes of and connects to the server to read those documents. Since that may take quite some time, it allows your application to continue running in the meantime. Then when the documents are available, it calls your closure. But that means the documents are only available after the closure has been called.
It's easiest to understand this flow, by placing a few print statements:
print("Before starting to get documents");
db.collection("Hotels").getDocuments() { (querySnapshot, err) in
print("Got documents");
}
print("After starting to get documents");
When you run this code, it will print:
Before starting to get documents
After starting to get documents
Got documents
Now when you first saw this code, that is probably not the output your expected. But it completely explains why the print(self.hotelCities) you have after the closure doesn't print anything: the data hasn't been loaded yet.
The quick solution is to make sure that all code that needs the documents is inside of the close that is called when the documents are loaded. Just like your top print(self.hotelCities) statement already is.
An alternative is to define your own closure as shown in this answer: https://stackoverflow.com/a/38364861
I trying to make an event app. and I add a new field in my events documents. I try to add "venue" field for my event documents
so before I run the app, I delete all the available data on my Firestore database. But when I retrieve my data back to the app, it is said that the "venue" is nil, it seems that the "venue" field is not exist, even though in fact, the "venue" field exist on my firestore database.
I suspect my app still retrieve my deleted documents. here is why
here is the code I use :
enum FirestoreCollectionReference {
case users
case events
case cities
case APIKey
private var path : String {
switch self {
case .users : return "users"
case .events : return "events"
case .cities : return "cities"
case .APIKey : return "secretAPIKeyKM"
}
}
func reference () -> CollectionReference {
return Firestore.firestore().collection(path)
}
}
FirestoreCollectionReference.events.reference()
.whereField("city", isEqualTo: selectedCity)
.whereField("eventType", isEqualTo: selectedEventType)
.whereField("coordinate", isGreaterThan: lesserGeopoint)
.whereField("coordinate", isLessThan: greaterGeopoint)
.order(by: "coordinate")
.order(by: "dateTimeStart", descending: true)
.limit(to: 20)
.addSnapshotListener { (snapshot, error) in
if let error = error {
completion(nil,eventListener)
print("Error when observing events document: \(error.localizedDescription)")
} else {
print("Successfully get events data from Firestore by Listener")
guard let documentsSnapshot = snapshot else {
completion(nil, eventListener)
return
}
let eventDocuments = documentsSnapshot.documents
print("the number of documents: \(eventDocuments.count)")
var eventsArray = [EventKM]()
for document in eventDocuments {
let eventDictionary = document.data()
let theEvent = EventKM(dictionary: eventDictionary)
eventsArray.append(theEvent)
}
completion(eventsArray,eventListener)
}
}
}
I try to print the number of documents, and it shows that I have 8 documents from this query, in fact, it should be only one document available in my database.
I try to delete the composite indexes from firebase console, but usually, after I delete the composite indexes, It will give an error + a link to generate the composite indexes in my debugging area on my Xcode, but after I delete the composite indexes, I don't get the error + link to generate the indexes, and give 8 documents (it should be one document only)
it seems the data is cached on my iOS app. isn't it? or is this a bug since Firestore is still in Beta version? I need to understand why and how to solve this issue so I can understand firebase better. Thanks in advance.
FireBase has cached in device so if user stay in outside of internet,
But still can use Firebase.
So You just remove your app in your simulator.
In my case, It fixed.
I am trying to update child values within firebase.
User first will create a new order, it creates two nodes, one in the main orders section and second under user to keep clean records. this seem to have worked but I am struggling to update values
then while he is on the form and makes updates, I want firebase to update simultaneously on firebase. How do I access to that specific key as nothing seem to have worked for me when I tried using observe method.
What will be the best way to access that key that the form is on and update values?
This is how you can update values in Firebase:
func updateDatabaseForEdits() {
let updates : [AnyHashable: Any] = ["variableName": value,
"variableName2": value]
ref.child("COrders").child("specificKeyYouWantToEdit").updateChildValues(updates, withCompletionBlock: { (error, success) in
if error != nil {
// upload failed
return
}
else {
// upload worked
// update your locally stored values
}
})
}
There are other issues with you app though. Specifically, how you're storing the data. How do you expect to know which key to access? I recommend you update your data store to be something like this:
desikhanapeena {
COrder {
key123 {
orderInformation
}
}
UserOrders {
uid {
key123
orderInformation
}
}
}
Let me know if you have questions:
If you want to get the key from a snapshot you can do that like this:
for child in snap.children {
let child = child as? DataSnapshot
if let key = child?.key {
// print(key)
}
}
If you want to get the key before you upload you can do that like this:
let key = ref.child("COrders").childByAutoId().key
in case if you are still looking for answer.
Answer for Prob #1.
you need to update order value for user, if it successfull then take parent key (in your case , its AutoID) from there , and using this key, update in "Corders".
here is the code
func updateBothValue(){
let value = ["key":"data","key1": "data2"]
REF.child("Users").child(UID).child("UserCorder").childByAutoId().setValue(value){
error, ref in
guard error == nil else { return }
let key = ref.key
REF.child("Coorders").child(key).setvalue(value)
}
}
for Prob #2, as you written "access that key that the form is on". for each form data , store the key which you get from firebase in previous steps. and use this key for updates.