忘掉Mongoose吧，这是更优雅的Mongorito

[isNeilLin]

MongoDB安装

mac

# 进入 /usr/local
cd /usr/local

# 下载
sudo curl -O https://fastdl.mongodb.org/osx/mongodb-osx-x86_64-3.4.2.tgz

# 解压
sudo tar -zxvf mongodb-osx-x86_64-3.4.2.tgz

# 重命名为 mongodb 目录
sudo mv mongodb-osx-x86_64-3.4.2 mongodb

# 把安装目录/bin添加到 PATH 路径中
export PATH=/usr/local/mongodb/bin:$PATH

# 创建数据库存储目录 /data/db
cd /
sudo mkdir data
cd /data
sudo mkdir db

# 启动 mongodb，默认数据库目录即为 /data/db
sudo mongod
# 如果没有创建全局路径 PATH，需要进入以下目录
cd /usr/local/mongodb/bin
sudo ./mongod

Mongorito

MongoDB ORM for Node based on Redux

安装

npm install mongorito --save
# or
yarn add mongorito

创建数据库连接

const { Database } = require('mongorito');
const db = new Database('localhost/test');
await db.connect();

创建Model

//class “Model”没有任何属性和方法
const { Model } = require('mongorito'); 

class Post extends Model {}

// 在数据库里注册 Model
db.register(Post);

创建Document

// 创建一个Model的实例
const post = new Post();
//or 
const post = new Post({
 title: 'First Post',
 author: {
 name: 'Neil Lin',
 age: 23
 },
 content: 'This is content',
 created: Date.now()
})

获取document中的字段

const title = post.get('title');
const author = post.get('author.name')

更新

post.set('title','Second Post');
post.set({
 author: {
 name: 'monica'
 },
 content: 'This content has already updated.'
})

await post.save()

删除

// 删除单个字段
post.unset('created');

// 删除多个字段
post.unset(['created','author.age'])

await post.save();

// 删除document
await post.remove();

自增字段

const post = new Post({
 views: 0
})

await post.increment('views');

post.get('views'); // => 1

await post.increment('views', 2);

post.get('views'); // => 3

一次增加多个字段

const post = new Post({
 views: 10,
 comments: 10
})

await post.increment({
 views: 5,
 comments: 2
})

post.get('views') // => 15
post.get('comments') // => 12

嵌套其他Model

class Post extends Model {}
class Author extends Model {}
class Comments extends Model {}

Post.embeds('author', Author)
Post.embeds('comments', Comments)

const post = new Post({
 title: 'Great post',
	author: new Author({name: 'Steve'}),
	comments: [new Comment({body: 'Interesting!'})]
})
//or
const post = new Post({
 title: 'Great post',
	author: {
		name: 'Steve'
	},
	comments: [{
		body: 'Interesting!'
	}]
})

await post.save();

查询

// 查找全部posts
await Post.find();

// 查找�tag为"js"的posts
await Post.find({tag: "js"});
// or
await Post.where({tag: "js"}).find();

// 查找最近5条posts
await Post
 .limit(5)
 .sort('created','desc')
 .find();

// 查找其中一条
await Post.findOne({title: 'First Post'});

// 获取posts条数
await Post.count({author: 'Neil Lin'});

插件

使用第三方插件

const timestamp = require('mongorito-timestamps');

db.use(timestamp({
 createdAt: 'created', // default 'created_at'
 updatedAt: 'updated' // default 'updated_at'
}))
// 或者只用于某个Model
Post.use(timestamp({
 createdAt: 'created', // default 'created_at'
 updatedAt: 'updated' // default 'updated_at'
}))

const post = new Post({title: 'Hello'});
await post.save();

post.get('created_at');
//=> 2017-05-17T18:02:06.612Z

编写插件

const extendPost = Post => {
 Post.Recently = function() {
 return this
			.limit(5)
			.sort('created', 'desc')
			.find();
 }

 Post.prototype.setTag = function(tag) {
 this.set('tag',tag);
 }
}

Post.use(extendPost);

const post = new Post();

post.setTag('mongodb');

await post.Recently(); //=> [Post, Post, Post]