mattr_accessor default_rejected_delegate_columns replaced with class_…

…inheritable_accessor for better customization

lib/delegate_belongs_to.rb

@@ -18,11 +18,6 @@
 module DelegateBelongsTo
 
  module ClassMethods
-
- # TODO class inheritance accessor
- @@default_rejected_delegate_columns = ['created_at','created_on','updated_at','updated_on','lock_version','type','id','position','parent_id','lft','rgt']
- mattr_accessor :default_rejected_delegate_columns
-
  ##
  # Creates methods for accessing and setting attributes on an association. Uses same
  # default list of attributes as delegates_to_association. 
@@ -64,10 +59,11 @@ def delegates_attributes_to(association, *attributes)
 
  end
 
- def self.included(receiver)
- receiver.extend ClassMethods
+ def self.included(base)
+ base.extend ClassMethods
+ base.class_inheritable_accessor :default_rejected_delegate_columns
+ base.default_rejected_delegate_columns = ['created_at','created_on','updated_at','updated_on','lock_version','type','id','position','parent_id','lft','rgt']
  end
-
 end
 
 ActiveRecord::Base.send :include, DelegateBelongsTo