mongo-wrapper

mongo-wrapper

This is a lightweight wrapper around the mongodb driver for Node.js. It simplifies connecting and adds a few helper methods.

Installation

$ npm install mongo-wrapper

Usage

Configuration

var mongo = require('mongo-wrapper');

var config = {
  username: 'admin_user',
  password: 'secret',
  hosts: [ 
    {name: 'primary-1.db.com', port: 27017}, 
    {name: 'secondary-1.db.com', port: 27017},
    {name: 'secondary-2.db.com', port: 27017} 
  ],
  database: 'db_1',
  options: {
    replicaSet: 'replicaset_1',
    readPreference: 'primaryPreferred'
  },
  indexes: {
    users: [
      {index: 'email', options: {unique: true}}
    ]
  }
};

db = mongo.setup(config);

// add your collections
db.add('users');

Query

// once the db is setup and collections are added you can use any
// methods found in the Mongo Driver Collection class
// http://mongodb.github.io/node-mongodb-native/api-generated/collection.html

db.users.insert({email: 'dan@email.com'}, function(err) {
  // inserted
});

db.users.findOne({email: 'dan@email.com'}, function(err, user) {
  // use user
});

Additional Helper Functions

findArray()

// findArray() simply calls toArray() on the cursor returned from
// Collection.find()
db.users.findArray(function(err, users) {
  // use users
});

findById(), updateById(), findAndModifyById()

// These functions make it simple to query by ObjectId and they
// accept either and ObjectId object or a JavaScript String.
db.users.findById('53683ca19c49151345e479ad', function(err, user) {
  // use user
});

bind()

// This allows you to bind a function on a collection so you can
// easily use mongo-wrapper with libraries like async
var user_id = db.id('53683ca19c49151345e479ad');
async.parallel({
  user: db.users.bind('findById', user_id),
  reservations: db.reservations.bind('findArray', {user_id: user_id})
}, callback);

db.id()

// a wrapper around ObjectId
db.id(); // creates a new ObjectId
db.id('53683ca19c49151345e479ad'); // creates the ObjectId
db.id('invalid id'); // returns null