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vsavkin/location_ar.rb

Created March 26, 2012 02:13
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Location AR
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location_ar.rb
class Location < ActiveRecord::Base
validates :city, :uniqueness => {:scope => :country}
def self.get country, city
location = Location.find_by_country_and_city(country, city)
raise "There is no '#{city}' in '#{country}'" unless location
location.readonly!
location
end
...
end
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