Name Firebase Child As Sequence Array

I want to use Fusionchart to read my Firebase data and create a chart in my web app. but my Firebase DB has a wrong structure, so the Fusionchart can't get data (my Firebase confi

Solution 1:

If you don't want the push ID inside your pseudo-numeric keys, call set instead of push.

So:

firebase.database().ref('testdata/User1').child(num).set({x:posX,y:posY,MaxSpeed:maxSpeed,steps:counter,time:Timeperiod/1000,speed:SpeedRecord,});

Your other problems seems (it's impossible to be certain, since you didn't include the code for the increment) to come from the fact that num is a string. If that is indeed the case, increment it with:

num = String(parseInt(num) + 1);

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Using such numeric keys is an antipattern in Firebase though, so I'd usually recommend against using them. If you must, at least pad them til a certain length, so that you can sort/filter on them easily.

Something as simple as:

num = String(parseInt(num) + 1).padLeft(5, "0");

Will work on all modern browsers, and ensures that all keys-that-look-like-numbers-but-behave-like-strings will show up in the order you expect.