Rails - Nov 2007 - New Foxy Fixtures (Rails 2) & STI (Single Table Inheritance)

I''ve got some problems right now using the new model for relationships
in fixtures (by label, not by id) and STI.  What I''ve got, is a couple
of models:

Attachment
--> FileDownload
Version

Version has_one file_download with file_download_id on the versions
table

In my fixtures, I have two FileDownloads in my attachments.yml like
so:

hemingway_alpha_zip:
  size: 100
  filename: hemingway_alpha.zip
  content_type: application/zip
  type: FileDownload
  project: hemingway

now, in my versions.yml, I have:

alpha:
  name: Alpha 1
  revision: 2
  description: this is the first alpha release for hemingway!
  project: hemingway
  file_download: hemingway_alpha_zip
  created_at: <%= (Time.now - 5.days).to_formatted_s(:db) %>

The problem I''m having is that it''s trying to put
file_download into a
column in versions when I run rake test:units

ActiveRecord::StatementInvalid: Mysql::Error: #42S22Unknown column
''file_download'' in ''field list'': INSERT INTO
`versions`
(`file_download`, `name`, `project_id`, `updated_at`, `id`,
`revision`, `description`, `created_at`) VALUES
(''hemingway_alpha_zip'', ''Alpha 1'', 2980859,
''2007-11-14 11:23:26'',
296151536, 2, ''this is the first alpha release for
hemingway!'',
''2007-11-09 11:23:26'')

Now, I''ve got two questions:

a) How can I make it think that file_download is a relationship and
not a field?
b) How can I get that label-hash id manually? (i.e. alpha -->
296151536) in case I just need to hack it in manually?


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(snip)

On Nov 14, 2007, at 11:47 AM,
kneath.lists-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:
> a) How can I make it think that file_download is a relationship and
> not a field?
> b) How can I get that label-hash id manually? (i.e. alpha -->
> 296151536) in case I just need to hack it in manually?
For (a), it sounds like you''re missing the other half of your has_one  
relationship. Do you have an appropriate belongs_to declared? The  
current fixture implementation expects has_one relationships to be  
specified on the belongs_to side, identically to has_many.

For (b), what you''re looking for is Fixtures.identify, e.g.,

   foo:
     bar_id: <%= Fixtures.identify(:label) %>


~ j.


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