google-cloud-firestore

问题 I have been trying to listen to more than one collection from Firestone using a StreamBuilder or something similar. My original code when I was working with only one Stream was: import 'package:flutter/cupertino.dart'; import 'package:flutter/material.dart'; import 'package:cloud_firestore/cloud_firestore.dart'; class List extends StatefulWidget{ ///The reference to the collection is like ///Firestore.instance.collection("users").document(firebaseUser.uid).collection("list1").reference()

问题 And How capitalize the displayName first element? How I get the capital first letter of displayName of user, who just registered on my app and store the first letter in firestore. Here is my code to store the data in firestore. void updateUserData(FirebaseUser user) async { DocumentReference ref = _db.collection('users').document(user.uid); return ref.setData({ 'uid': user.uid, 'email': user.email, 'photoURL': user.photoUrl, 'displayName': user.displayName, 'lastSeen': DateTime.now() }, merge

问题 Firestore Transactions is giving me the following error : Caused by: com.google.firebase.firestore.FirebaseFirestoreException: Every document read in a transaction must also be written. Here's the piece of code: db.runTransaction(new Transaction.Function<Void>() { @Override public Void apply(Transaction transaction) throws FirebaseFirestoreException { DocumentReference docRef2 = db.collection("ABC").document(mMatchedUserId); DocumentReference ref3 = db.collection("XYZ").document

问题 Basically, I would like to know if it is possible to update all of the documents found in a collection in Firestore. I am able to get all the documents in a list like so: mFirebaseFirestore.collection("Events").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() { @Override public void onComplete(@NonNull Task<QuerySnapshot> task) { if (task.isSuccessful()) { List<String> list = new ArrayList<>(); for (QueryDocumentSnapshot document : task.getResult()) { list.add(document

问题 Basically, I would like to know if it is possible to update all of the documents found in a collection in Firestore. I am able to get all the documents in a list like so: mFirebaseFirestore.collection("Events").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() { @Override public void onComplete(@NonNull Task<QuerySnapshot> task) { if (task.isSuccessful()) { List<String> list = new ArrayList<>(); for (QueryDocumentSnapshot document : task.getResult()) { list.add(document

问题 I am trying to query subcollection in Firebase, but I always get an empty list... This is my query: Firestore.instance.collection('messages').where('idFrom', isEqualTo: userID).snapshots(); I know that I have subcollection with another subcollection here.. /messages/RWzG98s92mVTZniofez6YoYsNhA3-tT2Q16n1FMZoTNZQOejtWuJdCmD2/RWzG98s92mVTZniofez6YoYsNhA3-tT2Q16n1FMZoTNZQOejtWuJdCmD2/1579394957103 And my question is how to query these types of models? 回答1: Since Firstore queries are always

问题 I am trying to query subcollection in Firebase, but I always get an empty list... This is my query: Firestore.instance.collection('messages').where('idFrom', isEqualTo: userID).snapshots(); I know that I have subcollection with another subcollection here.. /messages/RWzG98s92mVTZniofez6YoYsNhA3-tT2Q16n1FMZoTNZQOejtWuJdCmD2/RWzG98s92mVTZniofez6YoYsNhA3-tT2Q16n1FMZoTNZQOejtWuJdCmD2/1579394957103 And my question is how to query these types of models? 回答1: Since Firstore queries are always

问题 let say I try to get a list of eventID that liked by the user by using Firestore listener. I also use offline persistence. from this thread : Firestore - Using cache until online content updates I know that the listener will be fired immediately with the results from the cache and if there is a change result, I will get another snapshot with the changes. in swift, the reference to get the list is: FirestoreDocumentReference.users(uidUser: uid).reference().collection("likedEvents")

问题 let say I try to get a list of eventID that liked by the user by using Firestore listener. I also use offline persistence. from this thread : Firestore - Using cache until online content updates I know that the listener will be fired immediately with the results from the cache and if there is a change result, I will get another snapshot with the changes. in swift, the reference to get the list is: FirestoreDocumentReference.users(uidUser: uid).reference().collection("likedEvents")

问题 My Cloud Firestore looks like this: users ├────random_id_1───{name, email, ...} ├────random_id_2───{name, email, ...} ... └────random_id_n───{name, email, ...} I want to update a document of users given I have an unique identifier for it that is NOT the random id of the document (suppose, for example, the name is unique and I want to use it as identifier). How can I update a document identifying it by a field of it? 回答1: Firestore can only update documents for which it knows the complete