Quick opening hours object with mongomapper and a little meta

opening_hours.rb

class OpeningHours
  include MongoMapper::EmbeddedDocument      
  
  [:monday, :tuesday, :wednesday, :thursday, :friday, :saturday, :sunday].each do |weekday|
    class_eval <<-KEYS_AND_ACCESSORS
      key :#{weekday}_opening, :default => "CLOSED"
      key :#{weekday}_closing     
  
      def #{weekday}
        #{weekday}_opening == "CLOSED" ? #{weekday}_opening : \"\#\{#{weekday}_opening\} - \#\{#{weekday}_closing\}\"
      end
    KEYS_AND_ACCESSORS
  end
end

class Store
  include MongoMapper::Document   
  one :opening_hours
end

store = Store.create!
store.opening_hours.build
store.opening_hours.monday #=> "CLOSED"