gistfile1.txt

 :json => concat_json({
   # :items => items.to_json(:methods => [:beds, :capacity, :title]),
   # :locations => locations.to_json(:methods => :address, :include => :items)
                  :items => items.to_json(:methods => [:beds, :capacity], 
                                          :except => [:created_at, :updated_at, :search_timestamp, :verified, :active, :subcategories]),
                  :locations => locations.to_json(:methods => :address, :include => {:items => {:only => [:id], :methods => []}})
                })
                
@items
  -methods
    :beds
    :capacity
    :title
  -except
    :create_at
    :updated_at
    :search_timestamp
    :verified
    :active
    :subcategories
  
@locations
  -methods
    :adress
  +items
    -only
      :id