node.js - how to switch a database in mongodb driver?

Question

I'm new to this stuff and just stuck in the middle of nowhere. Am using node-mongodb-native and am in need to switch to another database (after authentication against admin db). I googled and found this topic where the creator of library recommends to keep a connection for each db in a hash. So my question is - how do I accomplish it?

See also stackoverflow.com/questions/30121148/changing-mongo-database for an alternative solution — Morten Siebuhr
– Morten Siebuhr, Commented Aug 16, 2017 at 11:29

Clint · Accepted Answer · 2011-07-06 14:54:56Z

3

Just create different database connections and store them in an object.

var dbConnections = {};

var dbConnections.authDb = new Db('adminDb', server, {});
dbConnections.authDb.authenticate(username, password);

var dbConnections.otherDb = new Db('otherDb', server, {});

Does that make sense?

answered Jul 6, 2011 at 14:54

Clint

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Comments

Morten Siebuhr · Accepted Answer · 2017-08-16 10:50:59Z

There's an example hidden in the MongoDB driver docs under Db:

[...]
MongoClient.connect('mongodb://localhost:27017/test', function(err, db) {
  [...]

  // Reference a different database sharing the same connections
  // for the data transfer
  var secondDb = db.db("integration_tests_2");

  // Fetch the collections
  var multipleColl1 = db.collection("multiple_db_instances");
  var multipleColl2 = secondDb.collection("multiple_db_instances");

  [...]
});

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