CODEWITHSUNDEEP
firebaseflutterdartfirebase-realtime-database
MindHunter
MindHunter

Reputation: 21

How to read data from Firebase Realtime database using Flutter/Dart

I am using Flutter and I would like to retrieve some data from my realtime database Firebase. I have the following data stored in the my realtime database Firebase:

How can I get each piece of information from it? For example I would like to get the name 'Tom' only?

Upvotes: 0

Views: 2911

Answers (3)

Dafi
Dafi

Reputation: 226

if your data in RTDB is Object, you can use casting type from result object to Map? then, convert it to collection .map(). here example:

final resultDataRealtimeDatabase = item.value as Map?;

final Map<String, dynamic> userData = resultDataRealtimeDatabase.map((key, value) => MapEntry(key as String, value);

final userModel = UserModel.fromJson(userData);

Upvotes: 0

Amoo Faruk
Amoo Faruk

Reputation: 63

FirebaseDatabase.instance.ref("users").onValue.listen((event) {

 final data = 
 Map<String, dynamic>.from(event.snapshot.value as Map,);

 data.forEach((key, value) {
     log("$value");
 });
});

Upvotes: 0

Rakesh Das
Rakesh Das

Reputation: 29

Reading through firebase documentation you can see that how we read and write data from RTDMS firebase.

  static Future<List<PostModel>> getPost() async {
    Query postsSnapshot = await FirebaseDatabase.instance
      .reference()
      .child("posts")
      .orderByKey();

    print(postsSnapshot); // to debug and see if data is returned

    List<PostModel> posts;

    Map<dynamic, dynamic> values = postsSnapshot.data.value;
    values.forEach((key, values) {
      posts.add(values);
    });

    return posts;
  }

your can call this function at the time of build the widget or after any action

Upvotes: 1

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