Custom Date Format made easy

date_formatter.rb

module DateFormatter
   def self.included(base)
     date_columns = base.columns.select{|column| ["date","datetime"].include?(column.sql_type) }
     date_columns.map(&:name).reject{|col_name| ["created_at", "updated_at"].include?(col_name)}.each{|column|

       base.class_eval do
           define_method column do
             read_attribute(column.to_sym).custom_format
           end

           define_method "#{column}=" do |val|
             write_attribute(column.to_sym, val.db_format)
           end
       end

     }
   end

end

#Rails.application.eager_load! if Rails.env == 'development'
#ActiveRecord::Base.subclasses.each{ |ar_class| ar_class.send(:include, DateFormatter) }