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
});
});
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
query.once().then((snapshot){
var result = data.value.values as Iterable;
for(var item in result) {
print(item);
}
});
or with async that you already use
var snapshot = await query.once();
var result = snapshot.value.values as Iterable;
for(var item in result) {
print(item);
}