Foreign key is not set on nested record

Don't you agree it is a bug? Any comments?

class PhotoAlbum < ActiveRecord::Base
attr_accessible :name, :description, :visible

has_many :photos, :dependent => :destroy

validates_presence_of :name

scope :visible, lambda { |admin| where(:visible => true) unless admin }

cattr_reader :per_page @@per_page = 6 end

class Photo < ActiveRecord::Base
attr_accessible :name, :position, :photo, :visible, :photo_album_id

belongs_to :photo_album

has_attached_file :photo, :styles => {

  :cover => '100x100#',
  :thumb => '150x150#',
  :original => '980x720>' }

before_post_process { translit_paperclip_file_name self.photo }

scope :visible, lambda { |admin| where(:visible => true) unless admin }

before_save :set_position, :on => :create

protected def set_position

self.position = 1 + Photo.where(:photo_album_id => self.photo_album_id).maximum(:position).to_i

end end

Well, I use cancan with load_resource, so I skip that line:
@photo.photo_albums.build(params[:photo_album]) in my controller. I don't know, if cancan is using #new or #build, but probably it is a cancan bug, I will check and answer later. Thank you.

I have not used cancan before but just browsing it's source code on Github I found https://github.com/ryanb/cancan/blob/master/lib/cancan/controller_a...:

  # [:+new+]
  #   Specify which actions are new resource actions in addition to :+new+ and :+create+.
  #   Pass an action name into here if you would like to build a new resource instead of
  #   fetch one.
  #
  #     load_resource :new => :build

Are you using that? If not it might be what you are looking for.

Yes, you're right. #new does not set foreign key, even on Rails 2.3. So probably cancan behavior has changed, so I had to add that line. Thank you for explanations. It's not Rails bug, let's close this ticket.