1. 安装Mongoose
npm install mongoose
2. 使用
2.1 创建连接
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');
2.2 获取数据库的一些通知信息
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function(callback){
//do something
});
2.3 创建Schmema和Model
var kittySchema = mongoose.Schema({
name: String
});
var Kitten = mongoose.model('Kitten', kittySchema)
var silence = new Kitten({ name: 'Silence' })
console.log(silence.name); // 'Silence'
2.4 为Model增加“行为”
kittySchema.methods.speak = function () {
var greeting = this.name
? "Meow name is " + this.name
: "I don't have a name"
console.log(greeting);
};
var Kitten = mongoose.model('Kitten', kittySchema);
var fluffy = new Kitten({ name: 'fluffy' });
fluffy.speak() // "Meow name is fluffy"
2.5 查找
Kitten.find(function (err, kittens) {
if (err) return console.error(err);
console.log(kittens)
});
Kitten.find({ name: /^Fluff/ }, callback)
2.6 保存或者更新
var kitty = new Cat({ name: 'Zildjian' });
kitty.save(function (err) {
if (err) // ...
console.log('meow');
});
2.7 删除
TaskModel.findById(req.params.id,function(err, task){
if(!err && task){
task.remove(function(){
res.redirect('/todo/tasks');
});
}
else{
res.end('not found.')
}
})
参考：
1. Mongoose-Getting Started http://mongoosejs.com/docs/index.html
2. Mongoose-docs http://mongoosejs.com/docs/guide.html
3. Queries http://mongoosejs.com/docs/queries.html
附代码：
var express = require('express');
var router = express.Router();
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var connStr = 'mongodb://localhost/todo_development';
mongoose.connect(connStr);
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function (callback) {
console.log('db open...');
});
var TaskSchema = new Schema({
task: String
});
var TaskModel = mongoose.model('Task', TaskSchema);
console.log('model Task is created.');
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('todo/index', { title: 'To Do List' });
});
router.get('/tasks', function(req, res, next){
//从数据库加载todos
TaskModel.find({}, function(err, docs){
if(!err){
res.render('todo/tasks/index',{
titile: 'Todos index view',
docs:docs
});
}else{
console.log(err);
res.render('todo/tasks/index',{
titile: 'Error happens when load todos.',
docs:[]
});
}
});
});
router.get('/tasks/new', function(req, res, next){
res.render('todo/tasks/new', {
title: 'New Task'
});
});
router.post('/tasks/new', function(req, res){
//save to db
var task = new TaskModel(req.body);
task.save(function(err){
if(!err){
res.redirect('/todo/tasks');
}else{
res.redirect('/todo/tasks/new');
console.log(err);
}
});
});
router.get('/tasks/:id/edit', function(req, res, next){
var task = TaskModel.findById(req.params.id,function(err, task){
if(!err){
res.render('todo/tasks/edit', {
title: 'Edit Task',
task: task
});
}
else{
res.end('not found.')
}
})
});
router.get('/tasks/:id/delete', function(req, res, next){
var task = TaskModel.findById(req.params.id,function(err, task){
if(!err && task){
task.remove(function(){
res.redirect('/todo/tasks');
});
}
else{
res.end('not found.')
}
})
});
router.post('/tasks/edit', function(req, res){
//save to db
var task = new TaskModel(req.body);
task.save(function(err){
if(!err){
res.redirect('/todo/tasks');
}else{
res.redirect('/todo/tasks/' + req.body.id + '/edit');
console.log(err);
}
});
});
module.exports = router;