/home/programfox/DevDoodle/front.js:830
dbcs.chatrooms.find().sort({_id: -1}).limit(1).next(function(err, last) {
^
TypeError: Object #<Cursor> has no method 'next'
at IncomingMessage.<anonymous> (/home/programfox/DevDoodle/front.js:830:53)
at IncomingMessage.emit (events.js:92:17)
at _stream_readable.js:943:16
at process._tickCallback (node.js:419:13)