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The smallest wrapper to Mongodb's native driver you will ever see
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A node.js module for mongodb.

It's the smallest wrapper you will ever, ever see.


var mw = require('mongowrapper');

var mongoOptions = {}

mw.connect('mongodb://localhost/yourdatabase', mongoOptions, function( err, db ){
  // db is defined here
  // `mw.db` is also available

Modules can then:

var mw = require('mongowrapper'),
    db = mw.db;

// ...
db.findOne({ _id: someId } , function( err, doc ){
  // ...

The module uses mongoClient.connect() to connect (yes, the new fancy syntax everybody should be using where you specify a connection URL!).

Note: db might not be set by the time your modules get to it. Unless you are using the callback, you shouldn't use mw.db without checking if it's !== null.

Bonus functions

The module comes with two important bonus functions:


When called without a parameter, this function will return a new ObjectId object:

var newId = new mw.ObjectId();

When called with a parameter, this function will convert the string into an ObjectId object:

var newId = new mw.ObjectId('123456789012345678901234);

It will create ObjectId objects using either the BSONNative (when/if available) or the fallback (slower) BSONPure function.


It checks if the string passed is a valid Mongo object id (a 24-byte long string with hex characters in it).

console.log( mw.checkObjectId('12345678901234567890ABCD' ) ); // true
console.log( mw.checkObjectId('ABCDEF78901234567890ABCD' ) ); // false

If you pass it an ObjectId, it will also return true:

console.log( mw.checkObjectId( new mw.ObjectId('123456789012345678901234')  ) );

Watch out, as ObjectId will throw an Error() if the string passed is not a legal ObjectId.

Why use this rather than the plain Mongo native driver?

This is as close as you will ever get to the native mongo driver. Other wrappers will wrap operations in functions which will queue requests till the connection to the database is established. This is not the case here, as the existance of the mw.db variable can be checked at runtime.

With this wrapper, you get:

  • An easy way to "reach" the db variable from other modules
  • A nice, powerful ObjectId() functions to create ObjectIds from scratch or based on a string, using the native function when possible
  • A simple function to check if a string is OK to construct an ObjectId.
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