asset.rb

module RCMS
  class Asset < ActiveRecord::Base
    self.table_name = 'rcms_assets'
    self.inheritance_column = :_type_disabled
  end
end
#does not work (has column name 'type')

link.rb

module RCMS
  class Link < ActiveRecord::Base
    self.table_name = 'rcms_links'
  end
end
#does work