Rails lookup v4 - Prefill the caches

gistfile1.rb

    def lookup(as_name)
      #...

      all_vals = cls.all
      cls.class_variable_set(:@@rcaches, all_vals.inject({}) do |r, obj|
          r[obj.name] = obj.id
          r
        end)
      cls.class_variable_set(:@@caches, all_vals.inject([]) do |r, obj|
          r[obj.id] = obj.name
          r
      end)
    end