# Confused by acts\_as\_list documentation **URL:** \ **Category:** Rails\ **Created:** [May 1, 2007, 4:42pm UTC](https://www.ruby-forum.com/t/confused-by-acts-as-list-documentation/103083 "2007-05-01T16:42:14Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![rinda](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ce73a5/32.png) [@rinda](https://www.ruby-forum.com/u/rinda)\ **Post date:** [May 1, 2007, 4:42pm UTC](https://www.ruby-forum.com/t/confused-by-acts-as-list-documentation/103083/1 "2007-05-01T16:42:14Z")
Hi, [http://api.rubyonrails.org/classes/ActiveRecord/Acts/List/ClassMethods.html](http://api.rubyonrails.org/classes/ActiveRecord/Acts/List/ClassMethods.html) I try to play with acts\_as\_list feature and I don’t understand these lines: todo\_list.first.move\_to\_bottom todo\_list.last.move\_higher todo\_list is supposed to be an instance from TodoList class. But there is no method ‘first’ on this class. Yes, move\_to\_bottom and move\_higher is working as expected. But it is must be like this: temp\_todo\_item = todo\_list.todo\_items.first temp\_todo\_item.move\_to\_bottom Is it documentation bug or am I misunderstanding the documentation? Thank you. ---
**Author:** ![rinda](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ce73a5/32.png) [@rinda](https://www.ruby-forum.com/u/rinda)\ **Post date:** [May 1, 2007, 5:49pm UTC](https://www.ruby-forum.com/t/confused-by-acts-as-list-documentation/103083/2 "2007-05-01T17:49:22Z")
Good question. first is a method built into Ruby. [http://rdoc.sourceforge.net/doc/classes/Range.html#M000007](http://rdoc.sourceforge.net/doc/classes/Range.html#M000007) Rails objects have a first method, because they are Ruby objects. It is not defined in the Rails source code here: [http://svn.rubyonrails.org/rails/trunk/activerecord/lib/active\_record/base.rb](http://svn.rubyonrails.org/rails/trunk/activerecord/lib/active_record/base.rb) Sean