db.js

/** * Created by Danny on 2015/9/28 16:44. *///引包var mongoose = require('mongoose');//创建数据库连接，每一个用户都会创建一个db，var db      = mongoose.createConnection('mongodb://127.0.0.1:27017/haha');//监听open事件db.once('open', function (callback) {    console.log("数据库成功连接");});//向外暴露这个db对象module.exports = db;

students.js

/** * Created by Danny on 2015/9/28 16:47. */var mongoose = require('mongoose');var db = require("./db.js");//创建了一个schema结构。var studentSchema = new mongoose.Schema({    name     :  {type : String},    age      :  {type : Number},    sex      :  {type : String}});//创建静态查找方法studentSchema.statics.zhaoren = function(name, callback) {    this.model('Student').find({name: name}, callback);};//创建修改的静态方法studentSchema.statics.xiugai = function(conditions,update,options,callback){    this.model("Student").update(conditions, update, options, callback);}//创建了一个模型，就是学生模型，就是学生类。//类是基于schema创建的。var studentModel = db.model('Student', studentSchema);//向外暴露module.exports = studentModel;

app.js

/** * Created by Danny on 2015/9/28 16:45. *///定义了一个模型，学生模型，“学生类”var Student = require("./models/Student.js");////实例化了一个学生类//var xiaoming = new Student({"name":"小明","age":12,"sex":"男"});////保存这个学生类//xiaoming.save(function(){
    //    console.log("存储成功");//});//用类来创建一个对象（工厂）Student.create({"name":"小红","age":13,"sex":"女"},function(error){   console.log("保存成功");})//Student.zhaoren("小明",function(err,result){    console.log(result);});Student.xiugai({
    "name":"小明"},{$set : {"age":30}},{},function(){    console.log("改年龄成功");});