Serialized hash, accessors as methods

extra_fields.rb

module ExtraFields
  def self.included(base)
        
        base.serialized_fields.each do |method_name|
          base.class_eval <<-EOS
            def #{method_name.to_s}
              extra_fields[:#{method_name}] if extra_fields && extra_fields[:#{method_name}]
            end
            def #{method_name.to_s}=(value)
              self.extra_fields[:#{method_name}] = value
            end
          EOS
        end
  end
end

page.rb

class Page
  include ExtraFields
  
  private

    def serialized_fields
      [:field_one, :field_two, :another_field]
    end

end