rubyonrailsin

I have a Shop model that has_many Zones (a Zone assigns different
pricing to products). I want to save a default Zone for a Shop. This
is what I have in my Shop class:

has_one :default_zone, :class_name => "Zone"

After that, however, I am a bit lost. I know I can manually set
shop.default_zone_id to a zone.id, but I would imagine a better system
of doing this exists.

Thanks,
Angelo, a desperate man

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