连接到mongoDB返回空数组

Question

我试图通过快递应用程序与mongodb进行“简单”连接，代码如下：

var express = require("express");
var http = require("http");
var mongoose = require("mongoose");

//database connections
var mongoose = require("mongoose"); 
mongoose.connect('mongodb://localhost:27017/contactlist');

var contactSchema = new mongoose.Schema({
    name: String,
    email: String,
    number: String
});

var Contact = mongoose.model("Contact", contactSchema);

exports.getcontactlist = function (request, response) {

    console.log("connecting to mongo again...");

    Contact.find({ }, function (err, docs) {

        console.log(docs);
        response.send(docs);
    });

};

返回的结果始终为“[]”。

请有人指出我正确的方向吗？

修改::

是的，数据库已填充