nodejs（一） 简单登录验证 使用mongoose 操作MongoDB

---恢复内容开始---

开发使用webstorm 9 

新建nodejs+express 项目 newfarmer

文章目录

1. 配置Mongoose
2. 创建目录及文件
3. 插入数据，POST提交JSON增加一条记录
4. 查询数据，取出刚增加的记录

1. 配置Mongoose

增加mongoose的类库

npm install mongoose --save
aaarticlea/png;base64,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" alt="" />

2.创建目录及文件

在models目录，增加mongodb.js文件 数据库连接文件
1 /**
  * Created by hao on 2014/12/28.
  */
 var mongoose = require('mongoose');
 mongoose.connect('mongodb://localhost/newfarmer');
 exports.mongoose = mongoose;

在models目录，增加users.js文件 用户实体类

 /**
  * Created by hao on 2014/12/28.
  */
 var mongodb = require('./mongodb');
 var Schema = mongodb.mongoose.Schema;
 var UserSchema = new Schema({
     username: String,
     password: String,
     salt: String,
     hash: String
 });
 var User = mongodb.mongoose.model('users', UserSchema);
 var UserDAO = function(){};

 UserDAO.prototype.save = function(obj, callback) {
     var instance = new User(obj);
     instance.save(function(err){
         callback(err);
     });
 };

 UserDAO.prototype.findByName = function(name, callback) {
     User.findOne({username:name}, function(err, obj){
         callback(err, obj);
     });
 };

 module.exports = new UserDAO();