如何使用MongoDB Node.JS驱动程序创建新数据库？

Question

How do I programmatically create a database using the MongoDB Node.JS driver?

This looks promising, but I'm not sure how to connect to with the admin credentials and create a new database.

var db = new Db('test', new Server('locahost', 27017));
  // Establish connection to db
  db.open(function(err, db) {
    assert.equal(null, err);

    // Add a user to the database
    db.addUser('user3', 'name', function(err, result) {
      assert.equal(null, err);

      // Authenticate
      db.authenticate('user3', 'name', function(err, result) {
        assert.equal(true, result);

        // Logout the db
        db.logout(function(err, result) {
          assert.equal(true, result);

          // Remove the user
          db.removeUser('user3', function(err, result) {
            assert.equal(true, result);

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

Answer 1

in mongodb databases and collections are created on first access. When the new user first connects and touches their data, their database will get created then.

Answer 2

This seems to work.

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

var db = new Db('test', new Server('localhost', 27017));
db.open(function (err, db) {
  if (err) throw err;

  // Use the admin database for the operation
  var adminDb = db.admin();

  adminDb.authenticate('adminLogin', 'adminPwd', function (err, result) {
    db.addUser('userLogin', 'userPwd', function (err, result) {
      console.log(err, result);
    });
  });
});

Answer 3

Try as below:

var adminuser = "admin";
var adminpass = "admin";
var server = "localhost";
var port   = 27017; 
var dbName = "mydatabase";
var mongodb          = require('mongodb');
var mongoClient = mongodb.MongoClient;

var connString = "mongodb://"+adminuser+":"+adminpass+"@"+server+":"+port+"/"+dbName;
    mongoClient.connect(connString, function(err, db) {
        if(!err) {
            console.log("\nMongo DB connected\n");                
        }
        else{
            console.log("Mongo DB could not be connected");
            process.exit(0);
        }
    });