Can you edit / update the polymorphic model, which is also a nested attribute?

I create a photo album where the user has many albums and each album has many photos.

Album class

Class Album < ActiveRecord::Base

 attr_accessible :photos_attributes, :name
 has_many photos, :as => imageable
 accepts_nested_attributes_for :photos

end

Photo class

Class Photo < ActiveRecord::Base

 attr_accessible :description, :location
 belongs_to :imageable, :polymorphic => true

end

Album Management Methods

def create
  @album = current_user.albums.build(params[:album])
  if @album.save
    redirect_to @album, :notice => "Successfully created album."
  else
    render :action => 'new'
  end
end


def edit
  @album = Album.find(params[:id])
end


def update
  @album = Album.find(params[:id])
  if @album.update_attributes(params[:album])
    redirect_to @album, :notice  => "Successfully updated album."
  else
    render :action => 'edit'
  end
end

Change album form

<%= form_for @album do |f| %>
    <%= f.label :album_name %><br />
    <%= f.text_field :name %>

  <%= f.fields_for :photos do |photo| %>
    <%= photo.label :photo_description %>
    <%= photo.text_field :description %>

    <%= photo.label :photo_location %>
    <%= photo.text_field :location %>
  <% end %>

<% end %>

The problem is that when the edit form is submitted, the photos_attributes data goes through the hash and the rails do not update it properly.

  Parameters: { "album"=>{"user_id"=>"1", "name"=>"Lake Tahoe", 
                "photos_attributes"=>{"1"=>{"description"=>"Top of the Mountain!", "id"=>"2"}, 
                                      "2"=>{"description"=>"From the cabin", "id"=>"5"}}}, 
                "commit"=>"Update Ablum", "id"=>"10"}

The identifier sent with the photos_attributes hash is the actual identifier in the photo table in the database. For some reason, rails do not update photo descriptions or locations if the user edits them. I believe that this is due to the fact that photos are polymorphic.

- , , ? .

!