gistfile1.rb

module ActiveSomething
  class Base
    def self.setup_methods!
      columns = File.readlines("#{self.name}.schema").map do |line|
                   line.chomp.split(/:/)
                 end
      columns.each do |name, column_type|
        instance_eval{attr_accessor name}
      end
    end
  end
end

# class Person < ActiveSomething::Base
# end

Dir['*.schema'].each do |file_name|
  klass_name = file_name.sub(/\.schema$/, '')
  Object.const_set(klass_name, Class.new(ActiveSomething::Base))
  Object.const_get(klass_name).setup_methods!
end

person = Person.new
person.name=("Chad")
person.age = 21
puts person.name
puts person.age