'Can I use a different fall back parameter if the params[:id] isn't the record ID?

I'd like to start using friendly IDs, but have legacy URLs that use the item_id column rather than id. How do I configure FriendlyId so that

class Item < ActiveRecord::Base
  extend FriendlyId
  friendly_id :name
end

@item = Item.friendly.find "Sneed"   
# But I also need Item.friendly.find(1) to find the Item with `item_id = 1`, not `id = 1`.

The find(1) still needs to find the record with id = 1 though. That is, I want to replace the current @item = Item.find_by(item_id: params[:id]) with @item = Item.friendly.find(params[:id])

friendly-id


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