google-cloud-firestore

问题 This question already has answers here : Cloud Firestore collection count (17 answers) Closed 2 years ago . db.collection("cities").get().then(function(querySnapshot) { console.log(querySnapshot.size); }); but the problem is I am using pagination and load 30 records for each call. so I am unable to get the total numbers of records. Is there any way to get it ? like, we are doing in sql. 回答1: How to get the total number of records in a collection with Firebase ? The method numChildren() do

问题 I think I'm doing something wrong but I can't figure which part... Thanks for all the clarification I can get. So I have a collection named Bases that looks like this: { "id1": { "name": "My base 1", "roles": { "idUser_123": { "name": "John" } } }, "id2": { "name": "My base 2", "roles": { "idUser_456": { "name": "Jane" } } } } idUser_123 log in and want to access his collection. So I do: db.collection('bases').get() And I use a match rule to make sure John is not reading Jane's bases. And

问题 My app crashes when calling "_submit" function 2 times in a row. I can pick the picture from gallery and upload it to Firebase Storage but if I call it again the the whole app crashes. From this button : floatingActionButton: FloatingActionButton( onPressed: () => _submit(), Submit calls a Provider of type Database : Future<void> _submit() async { widget.database = Provider.of<Database>(context, listen: false); await widget.database .setPicture("regione/citta/comune/lavoro/IDArtista/profilo

问题 I use Cloud Firestore and this is my data structure : Firestore-root | --- collection (collection) | --- uid (document) | --- name: some_name | --- some_fields: some_data | --- origin: [origin_1, origine_2, ...] <- List | --- category: [category_1, category_2, ...] <- List | --- meals: [meals_1, meals_2, ...] <- List | --- some_other_filters: [.....] <- List | --- all_categories: [origin_1:true, origine_2:true, meals_1:true, ....] I created the Map field all_categories to hold all different

问题 My app crashes when calling "_submit" function 2 times in a row. I can pick the picture from gallery and upload it to Firebase Storage but if I call it again the the whole app crashes. From this button : floatingActionButton: FloatingActionButton( onPressed: () => _submit(), Submit calls a Provider of type Database : Future<void> _submit() async { widget.database = Provider.of<Database>(context, listen: false); await widget.database .setPicture("regione/citta/comune/lavoro/IDArtista/profilo

问题 function Sermons() { const [{globalSeremon}, dispatch] = useStateValue() const [seremons, setSeremons] = useState([]) const [loading, setLoading] = useState(false) useEffect(() => { db.collection('sermons') .orderBy("date", "desc") .get() .then((snapshot) => { const localseremons = [] snapshot.forEach(doc => { localseremons.push(doc.data()) }) setSeremons(localseremons) }) .catch(e => console.log(e)) }) return ( <div> <Header/> <div className='container-lg seremon_container'> {seremons.map

问题 import 'package:cloud_firestore/cloud_firestore.dart'; import 'package:flutter/material.dart'; import 'package:geolocator/geolocator.dart'; import 'package:google_maps_flutter/google_maps_flutter.dart'; import 'package:flutter_spinkit/flutter_spinkit.dart'; class NewMap extends StatefulWidget { @override _NewMapState createState() => _NewMapState(); } class _NewMapState extends State<NewMap> { GoogleMapController _controller; Position position; Widget _child; Map<MarkerId, Marker> markers =

问题 I've got the following code for a an API endpoint that is supposed to trigger a Firestore backup using firebase-admin . This is how I'm initializing firebase-admin ; import * as admin from "firebase-admin"; admin.initializeApp({ credential: admin.credential.cert( SERVICE_ACCOUNT as admin.ServiceAccount )}); The service account key is a JSON I've downloaded using the default firebase-admin service account: This is the backup.ts API request handler. export const backupData: RequestHandler =

问题 TL;DR How do you perform a query on a secure Firestore collection? In Firestore have the following Security Rule: service cloud.firestore { match /databases/{database}/documents { match /users/{userId} { allow read, update, delete: if request.auth.uid == userId; allow create: if request.auth.uid != null; } } } Currently, the document ID is the userId and there is also a field in each document with the userId. I can find the document if I go straight to a specific document using its document

问题 I have a collection in Firestore that contains a string for the next 365 days. It's effectively a codeword that our app needs to display on that particular day. We've noticed that if a user changes the date and comes back to the app, Firestore correctly returns the codeword for that day because our query uses today's date to query for the codeword. Previously, we had a bespoke API on a server that would fetch based on the server's time to ensure this couldn't happen. What would be the best