[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);}

// modelvar 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 findvar 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();});

[转] node.js下mongoose简单操作实例

原文地址：https://www.cnblogs.com/chris-oil/p/9136537.html