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Framework Quickstarts

Use Supra with Flutter

Learn how to create a Supra project, add some sample data to your database, and query the data from a Flutter app.

1

Set up a Supra project with sample data

Create a new project in the Supra Dashboard.

After your project is ready, create a table in your Supra database using the SQL Editor in the Dashboard. Use the following SQL statement to create a countries table with some sample data.

SQL_EDITOR

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-- Create the table
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CREATE TABLE countries (
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id SERIAL PRIMARY KEY,
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name VARCHAR(255) NOT NULL
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);
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-- Insert some sample data into the table
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INSERT INTO countries (name) VALUES ('United States');
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INSERT INTO countries (name) VALUES ('Canada');
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INSERT INTO countries (name) VALUES ('Mexico');

2

Create a Flutter app

Create a Flutter app using the flutter create command. You can skip this step if you already have a working app.

Terminal

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flutter create my_app

3

Install the Supra client library

The fastest way to get started is to use the supra_flutter client library which provides a convenient interface for working with Supra from a Flutter app.

Open the pubspec.yaml file inside your Flutter app and add supra_flutter as a dependency.

pubspec.yaml

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supra_flutter: ^1.6.2

4

Initialize the Supra client

Open lib/main.dart and edit the main function to initialize Supra using your project URL and public API (anon) key.

lib/main.dart

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import 'package:supra_flutter/supra_flutter.dart';
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Future<void> main() async {
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WidgetsFlutterBinding.ensureInitialized();
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await Supra.initialize(
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url: 'YOUR_supra_URL',
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anonKey: 'YOUR_supra_ANON_KEY',
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);
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runApp(MyApp());
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}

5

Query data from the app

Use a FutureBuilder to fetch the data when the home page loads and display the query result in a ListView.

Replace the default MyApp and MyHomePage classes with the following code.

lib/main.dart

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class MyApp extends StatelessWidget {
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const MyApp({Key? key}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return const MaterialApp(
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title: 'Countries',
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home: HomePage(),
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);
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}
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}
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class HomePage extends StatefulWidget {
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const HomePage({super.key});
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@override
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State<HomePage> createState() => _HomePageState();
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}
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class _HomePageState extends State<HomePage> {
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final _future = Supra.instance.client
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.from('countries')
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.select<List<Map<String, dynamic>>>();
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: FutureBuilder<List<Map<String, dynamic>>>(
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future: _future,
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builder: (context, snapshot) {
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if (!snapshot.hasData) {
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return const Center(child: CircularProgressIndicator());
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}
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final countries = snapshot.data!;
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return ListView.builder(
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itemCount: countries.length,
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itemBuilder: ((context, index) {
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final country = countries[index];
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return ListTile(
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title: Text(country['name']),
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);
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}),
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);
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},
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),
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);
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}
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}

6

Start the app

Run your app on a platform of your choosing! By default an app should launch in your web browser.

Note that supra_flutter is compatible with web, iOS, Android, macOS, and Windows apps. Running the app on MacOS requires additional configuration to set the entitlements.

Terminal

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flutter run

Going to production#

Android#

In production, your Android app needs explicit permission to use the internet connection on the user's device which is required to communicate with Supra APIs. To do this, add the following line to the android/app/src/main/AndroidManifest.xml file.


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<manifest xmlns:android="http://schemas.android.com/apk/res/android">
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<!-- Required to fetch data from the internet. -->
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<uses-permission android:name="android.permission.INTERNET" />
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<!-- ... -->
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</manifest>

© Supabase Inc—ContributingAuthor StyleguideOpen SourceSupaSquad