Flutter: Get Firebase Database reference child all data

Question

I have a firebase database child which content is like below:

How to retrieve this in flutter?

My Current code:

static Future<Query> queryUsers() async{
return FirebaseDatabase.instance
    .reference()
    .child("zoom_users")
    .orderByChild('name');
}

queryUsers().then((query){
  query.once().then((snapshot){
    //Now how to retrive this snapshot? It's value data giving a json
  });
});

Answer 1

To retrieve the data try the following:

db = FirebaseDatabase.instance.reference().child("zoom_users");
db.once().then((DataSnapshot snapshot){
  Map<dynamic, dynamic> values = snapshot.value;
     values.forEach((key,values) {
      print(values["name"]);
    });
 });

Here first you add the reference at child zoom_users, then since value returns data['value'] you are able to assign it to Map<dynamic, dynamic> and then you loop inside the map using forEach and retrieve the values, example name.

Check this:

https://api.dartlang.org/stable/2.0.0/dart-core/Map/operator_get.html

Flutter: The method forEach isn't defined for the class DataSnapshot