CODEWITHSUNDEEP
javascripthtmlfirebasefirebase-realtime-database
Adam Lee
Adam Lee

Reputation: 586

Firebase Javascript: Get id of the first child

I'm trying to get the id of the first child in my database, but it returns "undefined". Below is my code, and how my data is structured:

var database = firebase.database().ref();
var postsRef = database.child("posts");
postsRef.orderByChild("date").limitToFirst(1).once("value", function(snapshot) {
    console.log(snapshot.ref.parent);
});

And this is how my data is structured:

posts
    1
        date
        title
        alias
        timestamp
    2
        date
        title
        alias
        timestamp
    3
        date
        title
        alias
        timestamp

Upvotes: 2

Views: 3497

Answers (2)

Clement Hoang
Clement Hoang

Reputation: 675

var postsRef = database.child("posts");
postsRef.orderByChild("date").limitToFirst(1).once("value", function(snapshot) {
    console.log(snapshot.key);
});

https://firebase.google.com/docs/reference/js/firebase.database.Reference#limitToFirst https://firebase.google.com/docs/reference/js/firebase.database.Reference#key

Upvotes: 1

Ashokkumar M. Prajapati
Ashokkumar M. Prajapati

Reputation: 493

var snapshotKey = snapshot.key;
var snapshotData = snapshot.val();

Upvotes: 1

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