Getting JSON Key Value from Firebase Datasnapshot
5,270
Solution 1
for accessing the key from DataSnapshot just use snapshot.key and you will have the relative key of the item in your case Users
.then((onValue) {
onValue.map(data => {
var key = data.key
})
});
or just use as given in firebase docs inside then
.then(function(snapshot) {
snapshot.forEach(function(childSnapshot) {
var key = childSnapshot.key; // you will get your key here
});
});
Solution 2
You can get the key by snapshot.key, you can find a reference to it here:
snapshot.forEach(function(childSnapshot) {
var childKey = childSnapshot.key;
var childData = childSnapshot.val();
// ...
});
https://firebase.google.com/docs/database/web/lists-of-data#listen_for_value_events
Author by
Wonderjimmy
Updated on December 04, 2022Comments
-
Wonderjimmy over 1 year
Meanwhile I am developing a Flutter app with Firebase and it is enjoyable indeed, of course there is hassle to overcome...
I setup a Firebase datastore, and through the firebase_database plugin I got a DataSnapshot returned as follow:
FirebaseDatabase.instance.reference().child('users') .orderByChild('emailAddress') .equalTo('[email protected]').once() .then((onValue) { Map data = onValue.value; });
I use a Map object to keep this JSON. A stupid question: if I just want to get the value "-L474-TYYYGPvCChlZCS", how should I do?