Node.js使用mongodb操作MongoDB数据库

npm i mongodb

const { MongoClient, ObjectId } = require('mongodb')

// 配置连接参数
const url = "mongodb://localhost:27017";
const options = { useNewUrlParser: true, useUnifiedTopology: true }


async function func() {
// 连接数据库
const client = await MongoClient.connect(url, options)

// 获取库、集合
const data = client.db("data");
const student = data.collection("student")

/**
* 写操作
*/
// 插入数据 insertOne insertMany
const result1 = await student.insertOne(
{ 'name': "Tom", age: 23 }
)
console.log(result1.insertedId);
// 5e8afa00e473da5ac1c0a9b7

// 更新数据 updateOne updateMany
const result2 = await student.updateOne(
{ _id: ObjectId('5e8af9dbda2c0b5aacb9ff1c') },
{ $set: { name: "Jack" } }
)
console.log(result2.modifiedCount); // 1

// 删除数据 deleteOne deleteMany
const result3 = await student.deleteOne(
{ _id: ObjectId('5e8af9dbda2c0b5aacb9ff1c') }
)
console.log(result3.deletedCount); // 1

/**
* 读操作
*/
// 查询数据 findOne find
const result4 = await student.findOne(
{ 'name': "Tom" }
)
console.log(result4);
// { _id: 5e8af9e8007ee05aad2b641f, name: 'Tom', age: 23 }

// 排序：升序(1) 降序(-1)， 分页
const result5 = await student.find(
{ 'name': "Tom" }
).skip(2).limit(2).sort({ age: -1 }).toArray()
console.log(result5);
// [
// { _id: 5e8afa00e473da5ac1c0a9b7, name: 'Tom', age: 23 },
// { _id: 5e8afaab247c7c5b0530143e, name: 'Tom', age: 23 }
// ]

// 关闭连接
client.close()
}


func()