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How to use the connect function from mongodb

Find comprehensive JavaScript mongodb.connect code examples handpicked from public code repositorys.

mongodb.connect is a method in the MongoDB Node.js driver that creates a new connection to a MongoDB server.

w2mdb.js

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event.setMaxListeners(20);


var mydb;
// Leave the connection open and reuse it.
new mc.connect(dbs, function(err, db) {
  if (!err) {
    db.on('close', function() {
         console.log('database CLOSED!, how to reopen???');
    });

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mongo.js

GitHub: dtube/avalon

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const spawn = require('child_process').spawn
const spawnSync = require('child_process').spawnSync

let mongo = {
    init: (cb) => {
        MongoClient.connect(db_url, {
            useNewUrlParser: true,
            useUnifiedTopology: true
        }, async function(err, client) {
            if (err) throw err

+ 3 other calls in file

How does mongodb.connect work?

mongodb.connect is a method in the MongoDB Node.js driver that creates a new connection to a MongoDB server. When you call mongodb.connect(), you pass in the following parameters: uri: A string that specifies the connection URI for the MongoDB server. options: An object that specifies additional options for the connection, such as connection settings and authentication credentials. Once you pass in these parameters, the method performs the following steps to establish a connection: Parse the URI: mongodb.connect() parses the uri parameter to extract the relevant connection details, such as the host, port, database name, and any authentication credentials. Create a client: Once the connection details are extracted, mongodb.connect() uses them to create a new MongoClient instance, which represents a connection to the MongoDB server. Connect to the server: mongodb.connect() calls the connect() method on the MongoClient instance to establish a connection to the MongoDB server. Return the client: Once the connection is established, mongodb.connect() returns the MongoClient instance, which can be used to interact with the MongoDB server. Overall, mongodb.connect provides a simple way to create a new connection to a MongoDB server and start interacting with its databases and collections. It's worth noting that the MongoDB Node.js driver also supports connection pooling, which can help improve performance and scalability in certain scenarios. To use connection pooling, you can create a MongoClient instance and call its connect() method with a poolSize option that specifies the maximum number of connections to maintain in the pool. Once the connection is established, you can use the MongoClient instance to perform database operations, and the driver will automatically manage the connection pool for you.

MongoClientInterface.js

GitHub: scality/Arsenal

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};
if (process.env.MONGO_POOL_SIZE &&
    !Number.isNaN(process.env.MONGO_POOL_SIZE)) {
    options.poolSize = Number.parseInt(process.env.MONGO_POOL_SIZE, 10);
}
return MongoClient.connect(this.mongoUrl, options, (err, client) => {
    if (err) {
        this.logger.error('error connecting to mongodb',
            { error: err.message });
        return cb(errors.InternalError);

+ 7 other calls in file

mongo.1.js

GitHub: b00tc4mp/skylab-bootcamp-202004

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module.exports = {
    connect(url) {
        // if (connection) {
        //     return Promise.resolve(connection)
        // } else {
        //     return mongodb.connect(url, { useUnifiedTopology: true })
        //         .then(_connection => connection = _connection)
        // }        


        return connection ?

Ai Example

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const MongoClient = require("mongodb").MongoClient;

const uri = "mongodb+srv:// : @.mongodb.net/test?retryWrites=true&w=majority";

const client = new MongoClient(uri, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

client.connect((err) => {
  if (err) {
    console.log("Error connecting to MongoDB:", err);
    return;
  }

  console.log("Connected to MongoDB");

  const collection = client.db("test").collection("myCollection");

  // Perform database operations here...

  client.close();
});

In this example, we first import the MongoClient class from the mongodb package. We then define a uri string that specifies the connection details for the MongoDB server we want to connect to, including the username, password, cluster, and database name. Next, we create a new MongoClient instance and pass in the uri string and an options object that includes useNewUrlParser and useUnifiedTopology options. These options are required in MongoDB 3.0 and later versions and ensure that the driver uses the correct connection string parser and topology engine. After creating the MongoClient instance, we call its connect() method to establish a connection to the MongoDB server. If an error occurs, we log an error message and return. Otherwise, we log a success message and create a new collection object that represents a collection in the test database. Finally, we can perform database operations using the collection object, and once we're done, we call the close() method on the MongoClient instance to close the connection. Overall, this example demonstrates how to use mongodb.connect() to create a new connection to a MongoDB server and perform database operations.

mongo.js

GitHub: PriceBeater/Shox

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var storage= function() {
  var _connect=function(callback) {
    if (dbconnect === undefined) {
      var connect_str='mongodb://'+config.storage.env.Host+":"+config.storage.env.Port+"/"+config.storage.env.DBNAME;
  
      MongoClient.connect(connect_str, function(err, db) {
        if(err) {
           return callback(err,null);
        }else {
          if(config.storage.env.User){

server.js

GitHub: Lion-Technology-Solutions/docker-containerization

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// set up Mongo
function mongoConnect() {
    return new Promise((resolve, reject) => {
        var mongoURL = process.env.MONGO_URL || 'mongodb://mongodb:27017/users';
        mongoClient.connect(mongoURL, (error, client) => {
            if(error) {
                reject(error);
            } else {
                db = client.db('users');

+ 9 other calls in file

lawoofMongoAPI.js

GitHub: ex3c-dev/lawoof-api

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/** Starts the server and makes it listen on Port 61650 **/
app.listen(61650, function() {
    console.log('Node.js server started on Port: 61650');
    
    MongoClient.connect(Url,{ useNewUrlParser: true }, function(err, client){
        Assert.equal(null, err);
    
        console.log("Connected successfully to server.");

mongoConnection.js

GitHub: naveenrenji/StockScope

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let _db = undefined;


module.exports = {
  dbConnection: async () => {
    if (!_connection) {
      _connection = await MongoClient.connect(mongoConfig.serverUrl);
      _db = await _connection.db(mongoConfig.database);
    }


    return _db;

+ 5 other calls in file

server.js

GitHub: roboshop-devops-project-v1/user

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if (process.env.DOCUMENTDB == 'true') {
function mongoConnect() {
    return new Promise((resolve, reject) => {
    var mongoURL = process.env.MONGO_URL || 'mongodb://username:password@mongodb:27017/users?tls=true&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false';
    var client = mongoClient.connect(mongoURL,
      {
        // Mutable & Immutable
        //tlsCAFile: `/home/roboshop/user/rds-combined-ca-bundle.pem` //Specify the DocDB; cert
        // Container

+ 7 other calls in file

account.posts.regist.js

GitHub: hirosi1900day/k8s-minikube

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if (errors) {
  res.render("./account/posts/regist-form.ejs", { errors, original });
  return;
}

MongoClient.connect(CONNECTION_URL, OPTIONS, (error, client) => {
  var db = client.db(DATABSE);
  db.collection("posts")
    .insertOne(original)
    .then(() => {

orderController.js

GitHub: aturaritonang/pos-api

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module.exports = exports = function (server) {
    //Route post
    server.post('/:suffix/api/order', verifyToken, (req, res, next) => {
        var suffix = req.params.suffix;
        MongoClient.connect(config.dbconn, { useNewUrlParser: true }, async function (err, dbase) {
            if (err) {
                return next(err);
            }

+ 5 other calls in file

productController.js

GitHub: aturaritonang/pos-api

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module.exports = exports = function (server) {


    server.post('/:suffix/api/product', verifyToken, (req, res, next) => {
        var suffix = req.params.suffix;


        MongoClient.connect(config.dbconn, async function (err, db) {
            if (err) {
                return next(new Error(err));
            }

+ 20 other calls in file

mongo_LookupModule.js

GitHub: JHNguyen801/capex

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let client = null;


const getConnection = async () => {
	if (client == null)
		client = await MongoClient.connect(dbUrl,
			{ useNewUrlParser: true, useUnifiedTopology: true });
	return client;
}

index.js

GitHub: brian-tle/quicklink-bot

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    return;
}

switch (command) {
    case 'mkcol':
        MongoClient.connect(process.env.MONGO_URL, { useNewUrlParser: true, useUnifiedTopology: true }, (err, db) => {
            if (err) { throw err; }

            var dbo = db.db(process.env.MONGO_DB_NAME);

+ 95 other calls in file

dbmgr.js

GitHub: jsengland/BattleshipProject

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    createcl(cbackfunc);
};


//creates the database
let createdb = function (callbackFn) {
    MongoClient.connect(url, {useNewUrlParser: true, useUnifiedTopology: true}, function (err, db) {
        if (err) throw err;
        console.log("Database created!");
        db.close();
    });

+ 63 other calls in file

mongoConnections.js

GitHub: scolicodes/BookBud

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let _db = undefined


module.exports = {
    dbConnection: async () => {
        if (!_connection) {
            _connection = await MongoClient.connect(mongoConfig.serverUrl)
            _db = await _connection.db(mongoConfig.database)
        }


        return _db

+ 4 other calls in file

functions.js

GitHub: LuukGit/Image-Search-Abstraction-Layer

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                },
                
initQueries:    function initQueries()
                {
                    console.log(mongoURL);
                    mongo.connect(mongoURL, function(err, db) {
                        if (err) { throw err; }
                        
                        var cursor = db.collection("queries").find();
                        cursor.each(function(err, docs) {

+ 9 other calls in file

process-ticks.js

GitHub: shaunak1111/Renko

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let db;
let data;


async function mongoConnect() {
  try {
    db = await MongoClient.connect(
      mlabURL,
      { useNewUrlParser: true }
    ).then(client => client.db());
    let collection = await db.collection("renko_bar");

DayzArmbands.js

GitHub: SowinskiBraeden/dayz-armband-manager

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  return; // prevent further attempts
}

try {
  // Connect to Mongo database.
  this.db = await MongoClient.connect(mongoURI, {connectTimeoutMS: 1000});
  this.dbo = this.db.db(dbo);
  this.log('Successfully connected to mongoDB');
  databaselogs.connected = true;
  databaselogs.attempts = 0; // reset attempts

server.js

GitHub: IKAMUSUMECHAN/node.js-study

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   res.redirect('index.html')
} else {
   res.writeHead(200, { 'Content-Type': 'text/html;charset=utf-8' });
   res.end('账号密码错误');
}*/
MongoClient.connect(url, { useNewUrlParser: true }, function(err, db) {
   if (err) throw err;
   var dbo = db.db("fileupload");
    var whereStr = {"name":req.body.first_name};  // 查询条件

+ 2 other calls in file

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