1-4 koa-mongodb

文档

github文档

1.mongodb插入一条数据

const MongoClient = require('mongodb').MongoClient;
const url = 'mongodb://localhost:27017';
MongoClient.connect(url, { useNewUrlParser: true },(err,client)=>{
    if(err) throw err;
    client.db('jike').collection('user').insertOne({name:"chengchao"},(err,res)=>{
        if(err) throw err;
        console.log('one document inserted');
        client.close()
    })
})

2.修改updateOne

MongoClient.connect(url, { useNewUrlParser: true },(err,client)=>{
        if(err) throw err;
        client.db('jike').collection('user').updateOne({"name":"jiangwei"},{
            $set:{"name":"李四"}
        },(err,res)=>{
            if(err) throw err;
        })
})

3.删除deleteOne

MongoClient.connect(url, { useNewUrlParser: true },(err,client)=>{
        if(err) throw err;
        client.db('jike').collection('user').deleteOne({name:'jiangwei'},(err,res)=>{
            if(err) throw err;
            console.log('one document delete');
            client.close()
        })
})

4.查询find

MongoClient.connect(url, { useNewUrlParser: true },(err,client)=>{
        if(err) throw err;
        client.db('jike').collection('user').find().toArray((err,res)=>{
            if(err) throw err;
            console.log(res);
            client.close()
        })
})

结合koa实现增删改查