Composite primary keys for Active Record

Dr Nic Williams has charged one of the major strongholds of legacy database compatibility with Rails, composite primary keys support. By installing his nimble plugin, you get a very natural API for mapping those blasted composites using set_primary_keys and an array of keys.

It’s still a work in progress, but if you have to deal with a legacy database and want to use Rails, this might just be your ticket in.

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