如何在节点中的mongodb上更新后得到结果数组数据？

Below is my code

以下是我的代码

var mongodb = require('mongodb');
var MongodbClient = mongodb.MongoClient;

MongodbClient.connect('mongodb://localhost/test', function(err, db) {
    if(!err){
        console.log("We are connected!!");
    }

    var contact = db.collection('contact');

    contact.update({name: "Fred"}, {$set: {tel:'09088oooxxaa'}}, function(err,r) {
       if(err){
           console.log("Update err");
       }
       else{
           console.log('Update success');
           console.log(r.name);
       }
   });

   contact.find({name: "Fred"}).toArray(function(err, results) {
       console.log(results[0]);
   });
});
var mongodb = requ