How to add data to Firestore Database in Flutter

In today’s flutter code example, we will explore how to add data or document to Firestore database in flutter.

We have covered lots of tutorials and code examples on how and when to use Firestore in other technologies.

In the next series of flutter code examples, we will illustrate many features of Firestore database that is available to flutter developers and how to use them.

Let’s focus on how to add data to Firestore database here.

To use Firestore in your flutter project, we will start with adding Firestore package as part of our application dependencies in the our project pubspec.yaml.

Secondly, move over to your Firebase Console to create a new Firebase project and give it a name of your choice.

To learn more on how to add third party libraries and packages in Flutter, I have provided a documentation from flutter developers guide.

Create new Flutter Project

In your Visual Studio Code, go to View menu > Command Palette.

In the open dialog, select Flutter. Enter the name of your Flutter project and hit enter key button.

Add dependencies to pubspec.yaml

name: firestore_example
description: A new Flutter project.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  http: 0.12.0
  dio: 2.0.22
  cloud_firestore: ^0.9.0 

  dev_dependencies:
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:
  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  assets:
    - assets/images/umbrella.png
    - assets/images/dnut.png
    - assets/star_anim.flr

  fonts:
    - family: AvenirNext
      fonts:
        - asset: assets/fonts/AvenirNextLTPro-Regular.otf

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.
  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages

Create new dart file inside lib folder

Go to your project lib folder and create a new dart file. Give the file a name of your choice.

Let import the Firestore package we added earlier to this class.

import 'package:cloud_firestore/cloud_firestore.dart';

Copy and past the code below inside the class.

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

class AddDataToFireStore extends StatelessWidget {
  TextEditingController _controller = TextEditingController();
  final db = Firestore.instance;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Add Data to Firestore")),
      body: ListView(
        padding: EdgeInsets.all(12.0),
        children: <Widget>[
          Padding(
            padding: EdgeInsets.symmetric(vertical: 15.0),
            child: TextField(
              controller: _controller,
              decoration: InputDecoration(hintText: 'Enter Title'),
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: RaisedButton(
              child: Text('Add'),
              color: Colors.red,
              onPressed: () async {
                // DocumentReference ref =
                await db.collection('info').add({'title': _controller.text});
              },
            ),
          ),
          SizedBox(height: 20.0),
          StreamBuilder<QuerySnapshot>(
              stream: db.collection('info').snapshots(),
              builder: (context, snapshot) {
                if (snapshot.hasData) {
                  return Column(
                    children: snapshot.data.documents.map((doc) {
                      return ListTile(title: Text(doc.data['title']));
                    }).toList(),
                  );
                } else {
                  return SizedBox();
                }
              }),
        ],
      ),
    );
  }
}

As you can see above, the code example is simple.

We use a text input to get some text from a user.

When a user clicks on the submit button, the text is added to a remote cloud Firestore database we initial added to our project.

From the Firestore package we added as dependency, we can get access to Firestore instance with the code below.

final db = Firestore.instance;

App entry point (Main.dart)

Open the main.dart file and add the code below

import 'package:flutter/material.dart';
import 'add_data_to_firestore.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Google SignIn',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: AddDataToFireStore(),
    );
  }
}

RUN YOUR APP

You can use flutter command to run your app – $ flutter run

If everything goes well, you will see screen similar to the image below in your flutter device.

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