javascript - Firebase timestamp filter -


i'm new firebase, i'm trying load data based on timestamp , retrieve between 2 timestamp using startat , endat. data pushed through python.

the data shown in sample screenshot

sample data

the data path popping-fire-7751.firebaseio.com/device488 

activevolt: 396 avgpowerfactor: 0.95 avgthdi: 7.5 cubetemp: 37 datetime: "2016-02-08 15:16:32" timestamp: 1454924792 totalpowergen: 34

i'm pushing data through python setting priority timestamp. when try filter shown here returns null. without startat , endat shows values.

http://jsfiddle.net/casperkamal/ezutp/64/

var starttime = 1454924792; var endtime = 1454924798;  new firebase("https://popping-fire-7751.firebaseio.com/")     .startat(starttime)     .endat(endtime)     .once('value', show);

can me on i'm doing wrong ?

you're trying skip level in json tree:

var starttime = 1454924792; var endtime = 1454924798;  new firebase("https://popping-fire-7751.firebaseio.com/")     .child('device488')     .startat(starttime)     .endat(endtime)     .once('value', show);

i highly recommend don't depend on implicit priority anymore , instead filter using orderbychild()

new firebase("https://popping-fire-7751.firebaseio.com/")     .child('device488')     .orderbychild('timestamp')     .startat(starttime)     .endat(endtime)     .once('value', show);

you'll need add index security rules:

{   "rules": {     "device488": {       ".indexon": ["timestamp"]     }   } }

but more explicit behavior worth effort of adding this.


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