gistfile1.coffee

**** Model
mongoose  = require 'mongoose'
Schema    = mongoose.Schema
ObjectId  = Schema.Types.ObjectId

validatePresenceOf = (value) ->
  return value && value.length

Floor = module.exports = new Schema
  number: String
  description: String
  rooms: [ { type: ObjectId } ]
  hotel: { type: ObjectId }

Floor.pre 'save', (next) ->
  if (!validatePresenceOf(@number))
    next(new Error('Number cannot be blank'))
  else
    next()



****** Query 

  Floor.find({ hotel: hotelId }, (err, results) ->
    console.log ' RESULTS from FLOOR INDEX '
    console.log JSON.stringify(results)
    if (err)
      res.send(200)
    else
      res.send(JSON.stringify({floors: results}))
  ).sort('number')