Rails - Apr 2007 - STI and has_many

I''m having a really hard time figuring out what''s wrong with
this scenario.
Here''s my setup

# My classes and their relationships...

class Document < ActiveRecord::Base
  has_many :attachments, :dependent => :destroy
end

class Page < Document
end

class Entry < Document
end

class Attachment < ActiveRecord::Base
  belongs_to :document
end


Then I''ve been trying this code [roughly]

@document = Page.find(1) # Assume there''s a record and not nil.
@document.attachments # => []
@document.attachments.create(params)
@document.attachments # => [an_attachment]

But the minute I reload...

@document = Page.find(1) # Reload that page!
@document.attachments # => [] again!


It looks like my attachment isn''t ever getting a value for
"document_id"
during the creation process. The attachment _is_ created but just sits there
alone floating in space. I also tried polymorphic but that didn''t do
any
better. Here''s the setup I used for polymorphic...


class Document < ActiveRecord::Base
  has_many :attachments, :as => :attachable, :dependent => :destroy
end

class Page < Document
end

class Entry < Document
end

class Attachment < ActiveRecord::Base
  belongs_to :attachable, :polymorphic => true
end


Help!? Thanks in advance!

RSL

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