Rails - Mar 2009 - normalized table query not working now

I have a Card table that previously had all of the data in it.  I made
a quite few tables and pulled the duplicated data into their own
table.
I was doing this:
@cards = Card.find_all_by_node_id(@node.id, :conditions =>
["HwDescription like ? OR HwDescription like
?","%OC%","%DS-1%"])

Now that is broken as the data is in a hwdescriptions table.

Any idea how to do this same query with a one-one relationship?
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take a look at the :include => :modelname option.

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