[转] node.js下mongoose简单操作实例

Mongoose API : http://mongoosejs.com/docs/api.html

// mongoose 链接
var mongoose = require('mongoose'); var db = mongoose.createConnection('mongodb://127.0.0.1:27017/NodeJS');

// 链接错误
db.on('error', function(error) { console.log(error); });

// Schema 结构
var mongooseSchema = new mongoose.Schema({ username : {type : String, default : '匿名用户'}, title : {type : String}, content : {type : String}, time : {type : Date, default: Date.now}, age : {type : Number} });

// 添加 mongoose 实例方法
mongooseSchema.methods.findbyusername = function(username, callback) { return this.model('mongoose').find({username: username}, callback); }

// 添加 mongoose 静态方法，静态方法在Model层就能使用
mongooseSchema.statics.findbytitle = function(title, callback) { return this.model('mongoose').find({title: title}, callback); }

// model
var mongooseModel = db.model('mongoose', mongooseSchema);

// 增加记录 基于 entity 操作
var doc = {username : 'emtity_demo_username', title : 'emtity_demo_title', content : 'emtity_demo_content'}; var mongooseEntity = new mongooseModel(doc); mongooseEntity.save(function(error) { if(error) { console.log(error); } else { console.log('saved OK!'); } // 关闭数据库链接 db.close(); });

// 增加记录 基于model操作
var doc = {username : 'model_demo_username', title : 'model_demo_title', content : 'model_demo_content'}; mongooseModel.create(doc, function(error){ if(error) { console.log(error); } else { console.log('save ok'); } // 关闭数据库链接 db.close(); });

// 修改记录
mongooseModel.update(conditions, update, options, callback); var conditions = {username : 'model_demo_username'}; var update = {$set : {age : 27, title : 'model_demo_title_update'}}; var options = {upsert : true}; mongooseModel.update(conditions, update, options, function(error){ if(error) { console.log(error); } else { console.log('update ok!'); } //关闭数据库链接 db.close(); });

// 查询
// 基于实例方法的查询
var mongooseEntity = new mongooseModel({}); mongooseEntity.findbyusername('model_demo_username', function(error, result){ if(error) { console.log(error); } else { console.log(result); } //关闭数据库链接 db.close(); });

// 基于静态方法的查询
mongooseModel.findbytitle('emtity_demo_title', function(error, result){ if(error) { console.log(error); } else { console.log(result); } //关闭数据库链接 db.close(); });

// mongoose find
var criteria = {title : 'emtity_demo_title'}; // 查询条件 var fields = {title : 1, content : 1, time : 1}; // 待返回的字段 var options = {}; mongooseModel.find(criteria, fields, options, function(error, result){ if(error) { console.log(error); } else { console.log(result); } //关闭数据库链接 db.close(); });

// 删除记录
var conditions = {username: 'emtity_demo_username'}; mongooseModel.remove(conditions, function(error){ if(error) { console.log(error); } else { console.log('delete ok!'); } //关闭数据库链接 db.close(); });