Question

I am using the node-mongodb-native drivers and I am looking for a way to open a persistent database connection rather than opening/closing it each time.

A simplified connection might look like this…

var DB = new mongo.Db('vows', new mongo.Server("127.0.0.1", 27017, {})),
    connection = DB.open(function(err, db) {
       // Here we have access to db
    });

How can I make the db object accessible to any module in my application? Rather than having to open the connection for every module separately?

Can this be done using module.exports? Or a global variable?

Answer 1

Edit: Don’t use mongoose, Use something like mongo-col or mongo-client. Then have a single client open in your application. I have ./client.js file that exports a properly opened and configured mongo client.

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Mongoose is a solid abstraction on top of mongodb that will allow you to handle mongodb more easily. It’s a worth a look.

What you really want to do though is re-open your client every time you do anything with mongo.

You don’t keep an open connection to any other database.

Just place your DB in a module along with some helper / wrapper functions.