arrays - Node.JS, MongoDB TypeError: undefined function -

i have error on function call don't know why doesn't works.

.get(function(req, res) {         appointment.find({'creator._id':'55836c3929294c2506000001'}).toarray(function(err, appoint){             console.log("retrieved records:");             console.log(appointment);         });     }); 

here can find error alert :

typeerror: undefined not function @ object.handle (/users/maximesauvage/appoint/server.js:199:67) 

(it's find method on row 199)

i want "appointment" rows creator._id = 55836c3929294c2506000001

my appointment json structure (an example):

{ "_id": {     "$oid": "55846bd717ed43180f000002" }, "creator": {     "_id": {         "$oid": "55836c3929294c2506000001"     },     "username": "hello",     "email": "hello@toto.com",     "__v": 2 

.get(function(req, res) {         appointment.find({'creator._id':'55836c3929294c2506000001'}, function(err, appoint){             console.log("retrieved records:");             var appointment = $.map(appoint, function(arr) { return arr; });             console.log(appoint);         });     }); 

.toarray jquery function , can used on jquery objects. try above code.