google-cloud-firestore

问题 I'm building an app where the users can write into my db and ask questions to other users, like a doctor app. Where the doctors can answer the questions. I wanna order the questions by date, where I would like to order the questions by newest, and also the most popular. I try to order the newest by the following: date: "29 September 2019" Firestore.instance .collection("Questions") .orderBy("date", descending: true) // 1 will be last, 31 will be latest .snapshots(), But that seem not to work.

问题 I'm building an app where the users can write into my db and ask questions to other users, like a doctor app. Where the doctors can answer the questions. I wanna order the questions by date, where I would like to order the questions by newest, and also the most popular. I try to order the newest by the following: date: "29 September 2019" Firestore.instance .collection("Questions") .orderBy("date", descending: true) // 1 will be last, 31 will be latest .snapshots(), But that seem not to work.

问题 I'm working with Firebase - Cloud Firestore and at the moment I would like to paginate all the records available. I already have a list of records and what is left is some pagination for this. I'm new with Cloud Firestore, so any clarity is appreciated. I checked the Firestore documentation (https://firebase.google.com/docs/firestore/query-data/query-cursors#paginate_a_query) and examples with ReactJS, but there is not much available. I understand that eg: .startAt(0), .limit(10) , but the

问题 I'm working with Firebase - Cloud Firestore and at the moment I would like to paginate all the records available. I already have a list of records and what is left is some pagination for this. I'm new with Cloud Firestore, so any clarity is appreciated. I checked the Firestore documentation (https://firebase.google.com/docs/firestore/query-data/query-cursors#paginate_a_query) and examples with ReactJS, but there is not much available. I understand that eg: .startAt(0), .limit(10) , but the

问题 I have a project that is located in the Central America region, but since I can choose a European region, I would like to change the location of the firestore and storage. Is it possible to do this without deleting the existing project? Updated Responce from technical support: Thank you for reaching out to us. Currently, once you select a location for your project, you cannot change it. You might find this documentation useful for additional information. https://firebase.google.com/docs

问题 Below is the code I used to retrieve documents data in a recyclerview. It works fine. But whenever the new document is added, it does not update it in real time. I know snapshot listener is for that purpose only but having a hard time to get it work. Any help will be appreciated. :) mFirestore.collection("Users").get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() { @Override public void onComplete(@NonNull Task<QuerySnapshot> task) { if (task.isSuccessful()){ for

问题 The problem is that data is not inserted. Here is the node.js code : const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); var db = admin.firestore(); exports.signUp = functions.https.onCall((data, context) => { const uuid = data.uuid; const name = data.name; const gender = data.gender; const age = data.age; var docRef = db.collection('users').doc(uuid).set({ name: name, gender: gender, age: age, current

问题 The problem is that data is not inserted. Here is the node.js code : const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase); var db = admin.firestore(); exports.signUp = functions.https.onCall((data, context) => { const uuid = data.uuid; const name = data.name; const gender = data.gender; const age = data.age; var docRef = db.collection('users').doc(uuid).set({ name: name, gender: gender, age: age, current

问题 I am trying to get all unseen messages that the current user has in conversation. The problem is that I do not know how to exclude other user seen messages and get only current user seen messages so I can do allMessages - allReadMessages = unread messages count This is my function that tries to achieve what I explained: //helper to get unread messages count async getUnseenMessagesCount(chatAuthor) { const collectionRef = (await firestore()).collection(this.collectionPath) try { collectionRef

问题 So in my Firestore db, I have about 2000 documents that contain images (blob) with some tags to group them, order them and search them on local device. In my app, images are stored in a local SQLFlite db and user is able to see them offline, Firestore offline persistance is also enabled. When device network connection is on, firestore listener reads all my queries again because my app shows my images according to the tags that I use to classify images, even if there is no changes in my