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

When using a non-default adapter, such as socket.io-redis, socket.rooms doesn't seem to do the trick. The way I managed to get the rooms for a specific client without looping was to use io.sockets.adapter.sids[socket.id], which returns the rooms as an object.

{ 'R-ZRgSf7h4wfPatcAAAC': true, ROOM: true, ROOM_2: true }

Note that this doesn't list sockets on other processes, though!

socket.io v1.3.7, socket.io-redis 1.0.0