Rails - Oct 2006 - has_many with nullable foreign_key?

Is there a way to use has_many and have it operate like such?

select * from pages where site_id = #{id} or site_id is null

I know there''s finder_sql, but then I''ll lose the
find_in_collection
goodness.


Thanks,
Joe

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something like:

@pages = Page.find :all, :conditions => ["site_id = ? OR site_id is
NULL",id]

:conditions takes a string for the SQL WHERE condition. The array i use
there, handles the espacing of the "id" value to prevent SQL
injection,
and then replaces "?" with the escaped value of id...


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