socket.io get rooms which socket is currently in

Question

Is it possible to get rooms which socket is currently in, without calling

io.sockets.clients(roomName)

for every room name and looking for

Answer 1

Socket.io v2.1.1

So make sure you aren't accessing the sockets rooms in the disconnect event like I was, as they have already left the rooms by the time that event is triggered. If you want to do that try it in the disconnecting event - https://github.com/socketio/socket.io/pull/2332/files

Then you can use any of the following:

Object.keys(socket.adapter.rooms)
Object.keys(socket.adapter.sids)
Object.keys(socket.rooms)