how to order by timestamp using Firebase?

Question

I\'m trying to order by timestamp in Firebase using orderByChild() but it\'s not working. The results seem to be ordered by the key and Firebase seems to be ign

Answer 1

Works for me:

firebase.database().ref(endpoint)
  .orderByChild('timestamp')
  .on('value', function(snapshot) {
  this.data = [];

  snapshot.forEach(function(child) {
    this.data.push(child.val());
  }.bind(this));

  console.log("all", data.map(function(val) { return new Date(val.timestamp).toString(); }));
});

"all"

["Fri Jun 17 2016 06:51:33 GMT-0700 (PDT)", "Fri Jun 17 2016 06:51:37 GMT-0700 (PDT)", "Fri Jun 17 2016 06:51:38 GMT-0700 (PDT)", "Fri Jun 17 2016 06:51:43 GMT-0700 (PDT)"] Blockquote

firebase.database().ref(endpoint)
  .orderByChild('timestamp')
  .startAt(1466171497190)
  .endAt(1466171498405)
  .on('value', function(snapshot) {
  this.data = [];

  snapshot.forEach(function(child) {
    this.data.push(child.val());
  }.bind(this));

  console.log("filtered", data.map(function(val) { return new Date(val.timestamp).toString(); }));

});

"filtered"

["Fri Jun 17 2016 06:51:37 GMT-0700 (PDT)", "Fri Jun 17 2016 06:51:38 GMT-0700 (PDT)"]

http://jsbin.com/humatuquju/edit?js,console