Is there a way to grab the data from owner ID I'm not able to access the collection oath because the documentID is auto-generated and not a specific value I have control of
A possible option would be to query your documents and retrieve a specifc OwnerID like this.
If you want to fetch all OwnerIDs from all of your documents just remove the 'whereField'.
Also check out the Firebase documentation for queries.
let docRef = db.collection("YOURCOLLECTIONNAME")
let query = docRef.whereField("OwnerID", isEqualTo:"VAL")
query.getDocuments{ (querySnapshot, error) in
if let error = error {
print("\(error.localizedDescription)")
}else {
for documents in (querySnapshot?.documents)! {
if let owner = documents.get("OWnerID") as? String {
print(owner)
}
}
Related
I need to get ID of document in Reservations collection. I don't know ho to do that. When I want to overwrite data in specific Reservation it can't because I don't have ID of the reservation. I am putting their UID of user that is wrong.
guard let uid = Auth.auth().currentUser?.uid else { return }
let userCollection = Firestore.firestore().collection("Users")
let thisUserDoc = userCollection.document(uid)
let snapshot = thisUserDoc.collection("Reservations").document(uid).updateData(data) { err in
if let err = err {
print("Error updating document: \(err) ")
}
else {
print("Document successfully updated")
}
}
Error message - wrong path
Database scructure
As shown in your code and in the error shared in your question you use the same document ID for the doc in the users collection and for the doc in the Reservations (sub)collection. The database screenshot shows that it cannot work: there isn’t any doc corresponding to this case.
You need to use an existing ID for the doc in the Reservations (sub)collection.
If you don’t know the desired ID you can maybe build a query based on some specific field(s) of the doc.
Currently my Firebase database is using the following structure
Users
User 1 Data
User 2 Data...
However I have created a new collection inside of the "users" collection called "products" which will store product details that users have uploaded on the application.
How can I ensure that once a user uploads a new product, it is only uploaded into their 'User X data' dataset, inside the respective "products" collection. The code I currently have only uploads the data into the "users" collection, with no reference of the users who added the product as required. I have shown the structure of my Firebase database below for reference.
Here is my code:
let user = Auth.auth().currentUser
db.collection("users").getDocuments { (snapshot, error) in
if let error = error {
print(error)
return
} else {
for document in snapshot!.documents {
let data = document.data()
let userId = data["uid"] as! String
if userId == user?.uid {
db.collection("users").document("products").setData(["productNameField":firstName, "productURLField":lastName,"productPriceField":ebayName, "productDescriptionField":etsyName, "productTimeRemainingField":email])
}
}
}
}
How would I go about updating my code to achieve this?
I think you're looking for
let user = Auth.auth().currentUser
db.collection("users").getDocuments { (snapshot, error) in
if let error = error {
print(error)
return
} else {
for document in snapshot!.documents {
let data = document.data()
let userId = data["uid"] as! String
if userId == user?.uid {
document.reference.collection("products").addDocument(["productNameField":firstName, "productURLField":lastName,"productPriceField":ebayName, "productDescriptionField":etsyName, "productTimeRemainingField":email])
}
}
}
}
So here document is the DocumentSnapshot that you're looping over, so document.reference gives you the reference to that specific document, and document.reference.collection("products") then points to the `products subcollection for that specific document.
You're wastefully looping over the entire list of users to FIND the user document needed. Simplify, simplify - use the user.uid as the Id of the user document!! (i.e. when you create the user document, save it as
db.collection("users").doc(user.uid).set({whatever})
...then it's trivial to access as...
let user = Auth.auth().currentUser
db
.collection("users")
.doc(user.uid)
.collection("products")
.setData([
"productNameField":firstName,
"productURLField":lastName,
"productPriceField":ebayName,
"productDescriptionField":etsyName,
"productTimeRemainingField":email
]);
If there is another reason to keep the docID and the uid separate (not shown here), then use a query to get the SPECIFIC document with the uid, rather than downloading ALL of them
let user = Auth.auth().currentUser
db
.collection("users")
.where(field: "uid", opStr:"==", value: user.uid)
.getDocuments( { (snapshot, error) in
if let error = error {
print(error)
return
} else { //the query should only return the one document, but queries always return an array
snapshot
.documents[0]
.ref()
.document("products")
.setData([
"productNameField":firstName,
"productURLField":lastName,
"productPriceField":ebayName,
"productDescriptionField":etsyName,
"productTimeRemainingField":email
])
}
}
...etc...
I don't generally use Swift, so the where clause may require different formatting, but the idea is GET ONLY THE DOCUMENT YOU NEED. Your security rules should only be allowing this, anyway.
let reference = Firestore
.firestore()
.collection(FBKeys.CollectionPath.users)
.document(uid)
reference.getDocument { (document, error) in
if let document = document, document.exists {
let dataDescription = document?.data()
print("Document data: \(dataDescription)")
} else {
print("Document does not exist")
}
}
I have created a cloud database using firebase. I have collection name is "users" and I have email, favoriteArtsts, name, uid as the fields. What I want to do is I want to add more artists to the favoriteArtsts array. However, to do so, I have to first get the reference to the array. By following the firebase instructions, I was able to get the user_id. The code above is the code I have tried. The code shows all the fields. However, I don't know how to get the favoriteArtsts values only. Is there a way to get the favoriteArtsts values?
You can get a single field by doing document.get("favoriteAritsts") (notice your typo in favoriteAritsts in your screenshots.
You can also do document.data()["favoriteAritsts"]
Both of the above will give you a return type of Any? so you would need to do any optional cast of either one with as? [String]:
let array = document.get("favoriteAritsts") as? [String]
My current firebase structure is Collection of Users which then have a subcollection of habits. For a given user, I want them to be able to add to their own collection of routines. however, running into an issue. When I run the function below, it just creates a separate user with a separate routine. How would I tie a new routine to a current authenticated user?
func addData(routineMsg: String){
let db = Firestore.firestore()
let user = db.collection("users").document()
let routine = db.collection("users").document("GzsHAHq1P0uXGdlYwF8P").collection("routines").document()
routine.setData(["id": routine.documentID, "routine": routineMsg]) { err in
if err != nil {
print((err?.localizedDescription)!)
return
}
}
}
Right now, the code shows how I hard-code it to a certain document (GzsHAHq1P0uXGdlYwF8P), but would like to be able to determine the document dynamically by user
let user = db.collection("users").document()
By not passing document() an argument, what you are doing is creating a new document reference with an auto-generated document ID. What you want to do is pass the method with a string that locates the user's document. Ideally, this would be the user's ID:
guard let uid = Auth.auth().currentUser?.uid else {
return
}
let userDocRef = db.collection("users").document(uid)
From there, to generate random document IDs in the subcollection, do what you were doing before:
func addData(routineMsg: String) {
guard let uid = Auth.auth().currentUser?.uid else {
return
}
let db = Firestore.firestore()
let userDocRef = db.collection("users").document(uid)
let routineDocRef = userDocRef.collection("routines").document()
routineDocRef.setData([
"id": routineDocRef.documentID,
"routine": routineMsg
]) { error in
if let error = error {
print(error)
}
}
}
Is it possible to extract a Firestore field (from a document), store it in a Swift file, and then use the value to create cells in a TableViewController?
The following is stored in my Firestore database:
users {
userid {
"level":0
"subjects":[""]
}
}
Can I somehow store 'subjects' into a Swift file (blank), and use this variable to make Table View cells (using rows)?
If what you are trying to do is query users for a specific user's "subjects" and store it in an array then this should work.
var db = Firestore.firestore()
let usersRef = db.collection("users").document(userid)
usersRef.getDocument { (document, error) in
if let document = document, document.exists {
let subjects = document.data()!["subjects"]
} else {
print("Document does not exist")
}
}
That subjects array can be used for your table view.