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鉴于这些机型:有没有更有效的方法来找到belongs_to记录?
Class Location < ActiveRecord::Base
has_many :devices
end
和
Class Device < ActiveRecord::Base
belongs_to :location
end
我现在能想到的唯一的办法是:
dev_list = []
locations = Location.near("some address") # using Geocoder :)
locations.each do |loc|
dev_list += loc.devices
end
是否有比。每循环更有效的方法?