最近项目中需要使用MongoDB做数据存储，从安装到简单使用做下记录
Mac安装MongoDB
Mac上使用 brew 安装MongoDB相对比较简单
brew tap mongodb/brew brew install mongodb-community //可以在后面跟版本号，安装指定版本brew install mongodb-community@6.0 安装信息：
- 配置文件：/usr/local/etc/mongod.conf
- 日志文件路径：/usr/local/var/log/mongodb
- 数据存放路径：/usr/local/var/mongodb
运行MongoDB：
我们可以使用 brew 命令或 mongod 命令来启动服务。
brew 启动：
$ brew services start mongodb-community ==> Successfully started `mongodb-community` (label: homebrew.mxcl.mongodb-community) brew 停止：
$ brew services stop mongodb-community Stopping `mongodb-community`... (might take a while) brew 重启
$ brew services restart mongodb-community Stopping `mongodb-community`... (might take a while) ==> Successfully stopped `mongodb-community` (label: homebrew.mxcl.mongodb-community) ==> Successfully started `mongodb-community` (label: homebrew.mxcl.mongodb-community) 数据库操作
MongoDB的语法和MySql很类似，常用的操作命令如下
命令行打开数据库
$ mongosh Current Mongosh Log ID: 63175e14bfac6e8caca29d59 Connecting to: mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+1.5.4 Using MongoDB: 6.0.1 Using Mongosh: 1.5.4 列出所有数据库
> show dbs admin 40.00 KiB aysncnpm 260.00 KiB config 84.00 KiB local 72.00 KiB 显示当前数据库
> db test 创建&&切换数据库
> use aysncnpm //如果数据库不存在，则创建数据库，否则切换到指定数据库。 switched to db aysncnpm 增删查改
> db.npm.insert({name:'react1'}) DeprecationWarning: Collection.insert() is deprecated. Use insertOne, insertMany, or bulkWrite. { acknowledged: true, insertedIds: { '0': ObjectId("6317612fbfac6e8caca29d5a") } } > db.npm.find({name:'react1}) //查 [ { _id: ObjectId("6317612fbfac6e8caca29d5a"), name: 'react1' } ] > db.npm.update({name:'react1'},{$set:{name:'resct2'}}) //更新 DeprecationWarning: Collection.update() is deprecated. Use updateOne, updateMany, or bulkWrite. { acknowledged: true, insertedId: null, matchedCount: 1, modifiedCount: 1, upsertedCount: 0 } > db.npm.remove({name:'react2'}) //删除 { acknowledged: true, deletedCount: 0 } node.js链接MongoDB
使用npm安装MongoDB
npm install mongodb 创建链接
var MongoClient = require('mongodb').MongoClient; var url = "mongodb://localhost:27017/aysncnpm"; MongoClient.connect(url, function(err, db) { if (err) throw err; console.log("数据库已创建!"); db.close(); }); 创建集合
var MongoClient = require('mongodb').MongoClient; var url = 'mongodb://localhost:27017'; MongoClient.connect(url, function (err, db) { if (err) throw err; console.log('数据库已创建'); var dbase = db.db("aysncnpm"); dbase.createCollection('npm', function (err, res) { if (err) throw err; console.log("创建集合!"); db.close(); }); }); 增删查改
var MongoClient = require('mongodb').MongoClient; var url = "mongodb://localhost:27017/"; MongoClient.connect(url, function(err, db) { if (err) throw err; var dbo = db.db("aysncnpm"); var myobj = { name: "react1"}; dbo.collection("npm").insertOne(myobj, function(err, res) { if (err) throw err; console.log("文档插入成功"); db.close(); }); dbo.collection("npm").find(myobj).toArray(function(err, result) { if (err) throw err; console.log(result); db.close(); }); dbo.collection("npm").updateOne(myobj, {$set:{name:'resct2'}}, function(err, res) { if (err) throw err; console.log("文档更新成功"); db.close(); }); dbo.collection("npm"). deleteOne(myobj, function(err, obj) { if (err) throw err; console.log("文档删除成功"); db.close(); }); });