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2009 Oct 23
2
validates_uniqueness_of across multiple rows?
Ok, that''s not the best subject line, but I couldn''t think of a concise way to describe what I''m trying to do. I''ve got two models. Grouping simply contains an id and a few other attributes (e.g. rating). A grouping can contain many elements which are stored the Element model. A set of elements is tied together by a grouping_id. An element can be one of