app.coffee

express = require 'express'
routes  = require './routes'
models  = require './models'

# initialize the application server

app = module.exports = express.createServer()

 ...

models.user.count()

models.index.coffee

mongo       = require 'mongodb'
model_user  = require './user'


# define the database connection

db_server = new mongo.Server 'localhost', 27107, {}
db_client = new mongo.Db 'foo', db_server


# open the database connection

db_client.open ->
    console.log 'database connection opened'


# export the db object modules

exports.user = new model_user(db_client)

models.user.index.coffee

# define the user db object

class User
    
    constructor: (@db) ->
    
    
    count: ->
        @db.collection 'users', (err, collection) ->
            collection.count (err, count) ->
                if err
                    console.log err
                else
                    console.log "there are #{ count } users"


# export the db object

module.exports = User