Node.js操作MongoDB数据库实例分析
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2022-06-15 15:50:18
本文实例讲述了node.js操作mongodb数据库。分享给大家供大家参考,具体如下:
node.js操作mongodb
npm init
npm i mongodb -...
本文实例讲述了node.js操作mongodb数据库。分享给大家供大家参考,具体如下:
node.js操作mongodb
npm init npm i mongodb --save
{ "name": "test", "version": "1.0.0", "description": "", "main": "app.js", "scripts": { "test": "echo \"error: no test specified\" && exit 1" }, "author": "", "license": "isc", "dependencies": { "mongodb": "^3.1.1" } }
连接数据库
// connect.js const mongoclient = require('mongodb').mongoclient; // connection url const url = 'mongodb://localhost:27017'; // database name const dbname = 'mydatabase'; // use connect method to connect to the server mongoclient.connect(url, { usenewurlparser: true }, function(err, client) { console.log("connected successfully to server"); const db = client.db(dbname); client.close(); });
插入
// insert.js const mongoclient = require('mongodb').mongoclient; // connection url const url = 'mongodb://localhost:27017'; // database name const dbname = 'mydatabase'; // 插入 var insertdata = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var data = [{"name": "李二狗001", "age": 20}, {"name": "李二狗002", "age": 21}]; // 插入文档 collection.insert(data, function (err, result) { if(err) { console.log('error: ' + err); return; } callback(result); }) } // use connect method to connect to the server mongoclient.connect(url, { usenewurlparser: true }, function(err, client) { console.log("connected successfully to server"); const db = client.db(dbname); insertdata(db, function (result) { console.log(result); client.close(); }); });
查询
// find.js const mongoclient = require('mongodb').mongoclient; // connection url const url = 'mongodb://localhost:27017'; // database name const dbname = 'mydatabase'; // 查询 var finddata = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var wherestr = {"name": "李二狗001"}; // 查询文档 collection.find(wherestr).toarray(function (err, result) { if(err) { console.log('error: ' + err); return; } callback(result); }) } // use connect method to connect to the server mongoclient.connect(url, { usenewurlparser: true }, function(err, client) { console.log("connected successfully to server"); const db = client.db(dbname); finddata(db, function (result) { console.log(result); client.close(); }) });
修改
// update.js const mongoclient = require('mongodb').mongoclient; // connection url const url = 'mongodb://localhost:27017'; // database name const dbname = 'mydatabase'; // 修改 var updatedata = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var wherestr = {"name": "李二狗002"}; var updatestr = {$set: {"age": 100}}; // 修改文档 collection.update(wherestr, updatestr, function (err, result) { if(err) { console.log('error: ' + err); return; } callback(result); }) } // use connect method to connect to the server mongoclient.connect(url, { usenewurlparser: true }, function(err, client) { console.log("connected successfully to server"); const db = client.db(dbname); updatedata(db, function (result) { console.log(result); client.close(); }) });
删除
// delete.js const mongoclient = require('mongodb').mongoclient; // connection url const url = 'mongodb://localhost:27017'; // database name const dbname = 'mydatabase'; // 删除 var deldata = function (db, callback) { // 获取文档集合 var collection = db.collection('collection3'); var wherestr = {"name": "李二狗002"}; // 删除文档 collection.remove(wherestr, function (err, result) { if(err) { console.log('error: ' + err); return; } callback(result); }) } // use connect method to connect to the server mongoclient.connect(url, { usenewurlparser: true }, function(err, client) { console.log("connected successfully to server"); const db = client.db(dbname); deldata(db, function (result) { console.log(result); client.close(); }) });
参考:
希望本文所述对大家node.js程序设计有所帮助。
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