Rails neophyte help w/composite keys

[Sal Gonzalez]

Hi all, I am trying to write (and learn) a rails application against
a legacy DB with CPKs, but I am having trouble out of the gate.

I am running rails 3.0.11, sqlite3, cpk 3.1.10 & a copy of
composite_migrations I pulled off the web, and I'm having a problem
getting started on this. I scoured the net to no avail on an in-depth
tutorial of this gem geared to a beginner rails programmer :(

Here is the extent of what I have done from a bare rails app:

* added a reference to cpk in the Gemfile

* created a very basic scaffold consisting only of 2 decimal fields
which are a CPK via:
`rails generate scaffold Claims ss:decimal claimnum:decimal`

* changed the migration to require composite_migrations and set the
create table line to:
'create_table :claims, :primary_key => [:ss, :claimnum] do |t|'

* changed the model to require cpk and include:
'set_primary_keys :ss, :claimnum'

* changed the controller to require cpk

* added a require for cpk into the dev environment .rb

* added 'match ':controller/:action/:id', :id => /\w+(,\W*\w+)*/' to
routes.rb directly below the resources line

After this I ran the migration (successfully), imported some data into
the sqlite table, ran the server and got a routing error when viewing
the index:

No route matches {:action=>"show", :id=>#<Claim ss: #<BigDecimal:
7f5a778c58b0,'0.99999999E8',9(18)>, claimnum: #<BigDecimal:
7f5a778c57c0,'0.99999998E7',9(18)>>, :controller=>"claims"}

I've tried to muck around with the route match statement, as well as
postfixing the columns with '_id' but I get the same routing error.
I'm sure this all boils down to my inexperience with rails in
general. Any help would be greatly appreciated.

P.S. I am creating the DB locally for testing, ideally I'd use the
existing legacy DB once I have a basic handle on rails and getting it
to behave with this gem.