[javascript] How do I connect to mongodb with node.js (and authenticate)?

How do I connect to mongodb with node.js?

I have the node-mongodb-native driver.

There's apparently 0 documentation.

Is it something like this?

var mongo = require('mongodb/lib/mongodb'); 
var Db= new mongo.Db( dbname, new mongo.Server( 'mongolab.com', 27017, {}), {}); 

Where do I put the username and the password?

Also how do I insert something?

Thanks.

I find using a Mongo url handy. I store the URL in an environment variable and use that to configure servers whilst the development version uses a default url with no password.

The URL has the form:

export MONGODB_DATABASE_URL=mongodb://USERNAME:PASSWORD@DBHOST:DBPORT/DBNAME

Code to connect this way:

var DATABASE_URL = process.env.MONGODB_DATABASE_URL || mongodb.DEFAULT_URL;

mongo_connect(DATABASE_URL, mongodb_server_options, 
      function(err, db) { 

          if(db && !err) {
          console.log("connected to mongodb" + " " + lobby_db);
          }
          else if(err) {
          console.log("NOT connected to mongodb " + err + " " + lobby_db);
          }
      });    

My version:

var MongoClient = require('mongodb').MongoClient;
MongoClient.connect('mongodb://user:pass@dhost:port/baseName', function(err, db) {
    if (err) {
        console.error(err);
    }
    var collection = db.collection('collectionName');
    collection.find().toArray(function(err, docs) {
        console.log(docs);
    });
});

if you continue to have problems with the native driver, you can also check out sleepy mongoose. It's a python REST server that you can simply access with node request to get to your Mongo instance. http://www.snailinaturtleneck.com/blog/2010/02/22/sleepy-mongoose-a-mongodb-rest-interface/

var mongo = require('mongodb');
var MongoClient = mongo.MongoClient;    
MongoClient.connect('mongodb://'+DATABASEUSERNAME+':'+DATABASEPASSWORD+'@'+DATABASEHOST+':'DATABASEPORT+'/'+DATABASENAME,function(err, db){  
      if(err) 
        console.log(err);
      else
      {
        console.log('Mongo Conn....');

      }
    });
//for local server 
//in local server DBPASSWOAD and DBusername not required
MongoClient.connect('mongodb://'+DATABASEHOST+':'+DATABASEPORT+'/'+DATABASENAME,function(err, db){  
      if(err) 
        console.log(err);
      else
      {
        console.log('Mongo Conn....');

      }
    });

I recommend mongoskin I just created.

var mongo = require('mongoskin');
var db = mongo.db('admin:pass@localhost/mydb?auto_reconnnect');
db.collection('mycollection').find().toArray(function(err, items){
   // do something with items
});

Is mongoskin sync? Nop, it is async.

Slight typo with Chris' answer.

Db.authenticate(user, password, function({ // callback }));

should be

Db.authenticate(user, password, function(){ // callback } );

Also depending on your mongodb configuration, you may need to connect to admin and auth there first before going to a different database. This will be the case if you don't add a user to the database you're trying to access. Then you can auth via admin and then switch db and then read or write at will.

Everyone should use this source link:

http://mongodb.github.com/node-mongodb-native/contents.html

Answer to the question:

var Db = require('mongodb').Db,
    MongoClient = require('mongodb').MongoClient,
    Server = require('mongodb').Server,
    ReplSetServers = require('mongodb').ReplSetServers,
    ObjectID = require('mongodb').ObjectID,
    Binary = require('mongodb').Binary,
    GridStore = require('mongodb').GridStore,
    Code = require('mongodb').Code,
    BSON = require('mongodb').pure().BSON,
    assert = require('assert');

var db = new Db('integration_tests', new Server("127.0.0.1", 27017,
 {auto_reconnect: false, poolSize: 4}), {w:0, native_parser: false});

// Establish connection to db
db.open(function(err, db) {
  assert.equal(null, err);

  // Add a user to the database
  db.addUser('user', 'name', function(err, result) {
    assert.equal(null, err);

    // Authenticate
    db.authenticate('user', 'name', function(err, result) {
      assert.equal(true, result);

      db.close();
    });
  });
});

You can do it like this

var db = require('mongo-lite').connect('mongodb://localhost/test')

more details ...

Here is new may to authenticate from "admin" and then switch to your desired DB for further operations:

   var MongoClient = require('mongodb').MongoClient;
var Db = require('mongodb').Db, Server = require('mongodb').Server ,
    assert = require('assert');

var user = 'user';
var password = 'password';

MongoClient.connect('mongodb://'+user+':'+password+'@localhost:27017/opsdb',{native_parser:true, authSource:'admin'}, function(err,db){
    if(err){
        console.log("Auth Failed");
        return;
    }
    console.log("Connected");
    db.collection("cols").find({loc:{ $eq: null } }, function(err, docs) {
        docs.each(function(err, doc) {
          if(doc) {
            console.log(doc['_id']);
          }
        });
    });

    db.close();

}); 

This worked for me:

Db.admin().authenticate(user, password, function() {} );

With the link provided by @mattdlockyer as reference, this worked for me:

var mongo = require('mongodb');
var server = new mongo.Server(host, port, options);
db = new mongo.Db(mydb, server, {fsync:true});
db.open(function(err, db) {
    if(!err) {
        console.log("Connected to database");
        db.authenticate(user, password, function(err, res) {
            if(!err) {
                console.log("Authenticated");
            } else {
                console.log("Error in authentication.");
                console.log(err);
            }
        });
    } else {
        console.log("Error in open().");
        console.log(err);
    };
});

exports.testMongo = function(req, res){
    db.collection( mycollection, function(err, collection) {
        collection.find().toArray(function(err, items) {
            res.send(items);
        });
    });
};

I'm using Mongoose to connect to mongodb. Install mongoose npm using following command

npm install mongoose

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/database_name', function(err){
    if(err){
        console.log('database not connected');
    }
});
var Schema = mongoose.Schema;
var userschema = new Schema ({});
var user = mongoose.model('collection_name', userschema);

we can use the queries like this

user.find({},function(err,data){
         if(err){
         console.log(err);
         }
        console.log(data);
    });