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4.Mongoose使用

4.1.nodejs操作mongodb

文档地址：http://mongodb.github.io/node-mongodb-native/3.2/tutorials/crud/

1.安装mongodb驱动

npm install mongodb --save-dev

2.连接数据库

const MOngoClient= require(&＃39;mongodb&＃39;).MongoClient;
var dburl = "mongodb://admin:123456@127.0.0.1:27017";
MongoClient.connect(dburl, {useNewUrlParser:true}, (err,client)=>{
if(err){
console.log(&＃39;数据库连接失败！&＃39;);
return;
};
const db = client.db("test")

});

3.插入数据

const MOngoClient= require(&＃39;mongodb&＃39;).MongoClient;
var url = "mongodb://admin:123456@127.0.0.1:27017";
var client = new MongoClient(url)
client.connect((err,client)=>{
if(err){
console.log(&＃39;数据库连接失败！&＃39;);
return;
};
const db = client.db("test")
// 插入数据
db.collection("user").insertOne({"name": "nodeing", "age": 18}, (err, result) => {
console.log(result)
})
});

4.更新数据

const MOngoClient= require(&＃39;mongodb&＃39;).MongoClient;
var url = "mongodb://admin:123456@127.0.0.1:27017";
var client = new MongoClient(url)
client.connect((err,client)=>{
if(err){
console.log(&＃39;数据库连接失败！&＃39;);
return;
};
const db = client.db("test")
db.collection(&＃39;user&＃39;).updateOne({"name": "nodeing"}, {$set: {"age": 38}}, (err, result)=>{
console.log(result)
client.close();
})
});

5.删除数据

const MOngoClient= require(&＃39;mongodb&＃39;).MongoClient;
var url = "mongodb://admin:123456@127.0.0.1:27017";
var client = new MongoClient(url)
client.connect((err,client)=>{
if(err){
console.log(&＃39;数据库连接失败！&＃39;);
return;
};
const db = client.db("test")
db.collection(&＃39;user&＃39;).deleteOne({"name": "nodeing"}, (err, result)=>{
console.log(result)
client.close();
})
});

螺钉课堂视频课程地址：http://edu.nodeing.com