created by http://mediumexposure.com/multiple-table-inheritance-active-record/ with some modifications For use add to your model: include InheritedProperties inherits_properties_from 'SomePropertiesClass'

inherited_properties.rb

module InheritedProperties
  extend ActiveSupport::Concern

  included do

  end

  def properties_with_autobuild
    properties_without_autobuild || build_properties
  end

  def method_missing(meth, *args, &blk)
    properties.send(meth, *args, &blk)
  rescue NoMethodError
    super
  end

  module ClassMethods
    def inherits_properties_from(association_class_name)
      has_one :properties, class_name: association_class_name, autosave: true, inverse_of: model_name.underscore.to_sym
      validate :properties_must_be_valid
      alias_method_chain :properties, :autobuild
      extend ClassMethods
      define_properties_accessors(association_class_name.constantize)
    end

    def define_properties_accessors(association_class)
      all_attributes = association_class.table_exists? ? association_class.content_columns.map(&:name) : []
      ignored_attributes = %w[]
      attributes_to_delegate = all_attributes - ignored_attributes
      attributes_to_delegate.each do |attrib|
        class_eval <<-RUBY
          def #{attrib}
            properties.#{attrib}
          end

          def #{attrib}=(value)
            self.properties.#{attrib} = value
          end

          def #{attrib}?
            self.properties.#{attrib}?
          end
        RUBY
      end
    end

  end

protected

  def properties_must_be_valid
    unless properties.valid?
      properties.errors.each do |attr, message|
        errors.add(attr, message)
      end
    end
  end

end