How to update data from database in realtime?

Question

I will build an app where I fetch data from http. The backend is PHP and on the page it show me the phpmyadim database.

In flutter I would like to get the data and show it in a listview. And when the data is change I would like that the listview is automatically reloaded.

My question is should I use Future builder or stream builder? And how I should do it.

score 3 · Answer 1 · answered May 04 '19 at 10:48

WebSockets is a good choise when your data changes very frequently for example during chat session. Otherwise I propose to use Firebase Cloud Messaging it will give you online data update when your app is open and push notification if it's close.

In your root widget

  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();

  @override
  void initState() {

    super.initState();

    _firebaseMessaging.configure(
        onMessage: (Map<String, dynamic> message) async {
           // or use setState
          _bloc.dispatch(new LoadMyCalendar());
        }
    );

Second part is call Firebase API from your web server app when data is changing

We use this and it works really well for iOS, Android, Web, Flutter. Also you can turn off push notifications optionally. — Oliver Dixon, Jul 10 '20 at 14:23

easeccy · Answer 2 · 2020-07-13T15:25:43.077

2

You can't update the data in realtime with HTTP requests. Only sockets can allow realtime comunication. You need to use websocket in this case. These might help:

Websockets in PHP

Websockets in Flutter

edited Jul 13 '20 at 15:25

answered May 03 '19 at 18:15

easeccy

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Just a note, web sockets are really horrible at scale. – Oliver Dixon Jul 10 '20 at 14:24
@OliverDixon is there any better solutions available? – easeccy Jul 10 '20 at 21:35
Firestore does everything. – Oliver Dixon Jul 12 '20 at 15:04
Yeah, best solution. – easeccy Jul 12 '20 at 20:09

How to update data from database in realtime?

2 Answers2