如何从firebase实时数据库中检索数据使用时间戳？

Question

this is my db structure : https://drive.google.com/open?id=15067yFPeeGoQH9kaagw6vxw-zoDFXmBN

I want to retrieve data from the child "nilai" based on time using timestamp, then enter it into the highchart, I am confused by the code, is my code correct?

var startdate = 1552268459655;
var enddate = 1552268535866;
    firebase.database().ref().child("Perangkat2").child("hujan").child("2").child("hujanpermenit").child(data.key).orderByChild("timestamp").startAt(startdate).endAt(enddate).once('value').then(function(snapshot) {
snapshot.forEach(function(child) {
var childData = child.val();
var timestamps=child.val().timestamp;
var nilai=child.val().nilai;
   });
});

Answer 1

Try this code:

var startdate = 1552268459655;
var enddate = 1552268535866;
firebase.database().ref().child("Perangkat2").child("hujan").child("2").child("hujanpermenit").orderByChild("timestamp").startAt(startdate).endAt(enddate).once('value').then(function(snapshot) {
snapshot.forEach(function(child) {
var childData = child.val();
var timestamps=child.val().timestamp;
var nilai=child.val().nilai;
});
});