This is supported and would work with no implementation changes. The "Friendly Attributes" idea is very flexible. Just a small Ruby syntax correction for your

This is supported and would work with no implementation changes. The "Friendly Attributes" idea is very flexible. Just a small Ruby syntax correction for your example: Billing::Plan.find_or_create_all_by_attrs!( standard: {1.month => 10, 1.year => 100}, ... )