User has many residents.

## Resident Database

class CreateResidents < ActiveRecord::Migration
  def self.up
    create_table :residents do |t|
      t.integer :user_id,
                :house_id
      t.boolean :currently, :null => false, :default => true
      t.timestamps
    end
  end

  def self.down
    drop_table :residents
  end
end


## Resident Model

class Resident < ActiveRecord::Base
  belongs_to :user
  belongs_to :house

  def current

  end

  def self.has_resident? facebook_uid
    user = User.find_by_facebook_uid(facebook_uid)
    if user == nil
      false
    else
      find_by_user_id(user.id, :conditions => "currently = true") == nil ? false : true
    end
  end
end