# File lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 662 def remove_references(*args) options = args.extract_options! polymorphic = options.delete(:polymorphic) args.each do |col| @base.remove_column(@table_name, "#{col}_id") @base.remove_column(@table_name, "#{col}_type") unless polymorphic.nil? end end