gistfile1.txt

## Listing
  has_one :residential

  delegate :room_desc

## Listing::Residential

## Console
>> listing.room_desc = "This is a room"
=> "This is a room"
>> listing.room_desc
=> "This is a room"
>> listing.attributes[:room_desc] = "this is something else"
=> "this is something else"
>> listing.room_desc
=> "This is a room"

## What I want to do
      listing = Listing.new
      listing.build_residential
      listing.attributes = attributes_hash