mongoose數據庫怎么同步讀取數據？

var newOrderList = {shopPlace : String}

async.map(orderList,function(oneOrder,cb){

Shop.findOne({'name': oneOrder.shopName},function(err,shop){

newOrderList.shopPlace = shop.place;

cb(null,newOrderList)

})

},function(err,results){

res.render('userOrderRecord',{

,'orderList': results

});

})