Rails - Feb 2010 - Seeking good examples for Data Warehousing / Dimensional Modeling

Group:

Are there any good fully-spelled-out examples for Data Warehousing /
Dimensional modeling in Rails?  (An implementation of one of the
chapters from Ralph Kimball''s excellent "The Data Warehouse
Toolkit
would be ideal...)

I understand Dimensional Modeling.  I understand just enough Rails,
but not quite enough to write the migrations to establish foreign
keys, one-to-many relationships, etc.  It''s a small hurdle, I know,
but it''s one that I haven''t been able to scale.  There must be
others
in the same boat.

(For now, I''m NOT interested in a pre-written package like
ActiveWarehouse -- I''d like to understand what''s going on
under the
hood, at least at first.  Later, I will switch over if appropriate...)

TIA.

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