##venues_controller.rb
class VenuesController < InheritedResources::Base
  belongs_to :user, :optional => true

  def create
    #@user = User.find(params[:user_id]) # => if I uncomment these, only then it creates venues
    #@venue = @user.venues.create!(params[:venue]) # => if I uncomment these, only then it creates venues
    create!{ user_venue_path(@user, @venue)}
  end


  def update
    update!{ user_venue_path(@user, @venue)}
  end

  protected

  def collection
    @venues ||= end_of_association_chain.paginate :page => params[:page], :order => 'updated_at DESC'
  end

  def build_resource
    @venue ||= end_of_association_chain.new(params[:venue])
    @venue.build_address(params[:venue] && params[:venue][:address_attributes])
  end

end


## relevant routes

map.resources :users do |user|
  user.resources :bands
  user.resources :venues
end


## addresses_controller.rb

class AddressesController < InheritedResources::Base
  belongs_to :user, :polymorphic => true
  belongs_to :user do
    belongs_to :venue, :band, :polymorphic => true
  end
end