Converting FirebaseDataSnapshot into a JS object

Question

I am pushing on object into my ROOMS array with .on("child_added", ....) as below. One of the parts of that object is an array of other objects (Player obj which has some properties like id, name, and so on). How do i assign to ROOMS.players because snap.child("players").val() does not work (EXCEPTION: Error trying to diff '[object Object]') snap.child("players").val() structure looks something like this:

-rooms
   -id
   -name
   -isRoomFull
   +board
   -players
      -kEFvdfeff84fdfdff
          -id
          -name
      -kEFvd4545dfjh9fvv
          -id
          -name



getRooms() {
this.roomsRef.on("child_added", function(snap) {
    ROOMS.push({
        id: snap.child("id").val(),
        name: snap.child("name").val(),
        players: [], //how to assign to this property
        isRoomFull: snap.child("isRoomFull").val(),
        board: snap.child("board").val(),
    })
});

score 0 · Accepted Answer · edited May 23 '17 at 12:32

0

I would try something like that:

var obj = snap.child("players").val().players;
var players = Object.keys(obj).map(key => return obj[key]);

ROOMS.push({
    id: snap.child("id").val(),
    name: snap.child("name").val(),
    players: players,
    isRoomFull: snap.child("isRoomFull").val(),
    board: snap.child("board").val(),
});

See this question for more details:

Converting a JS object to an array

edited May 23 '17 at 12:32

Community

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answered Apr 09 '16 at 16:21

Thierry Templier

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That worked good. I had to modify couple things `var obj = snap.child("players").val(); var players = Object.keys(obj).map(key => {return obj[key]});` – ska.dev Apr 09 '16 at 16:36

Converting FirebaseDataSnapshot into a JS object

1 Answers1