# \[activerecord\]what are the reserved attribute names that become protected attributes **URL:** \ **Category:** Rails\ **Created:** [July 28, 2009, 1:48am UTC](https://www.ruby-forum.com/t/activerecord-what-are-the-reserved-attribute-names-that-become-protected-attributes/172786 "2009-07-28T01:48:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ate50eggs](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/fbc32d/32.png) [@ate50eggs](https://www.ruby-forum.com/u/ate50eggs)\ **Post date:** [July 28, 2009, 1:48am UTC](https://www.ruby-forum.com/t/activerecord-what-are-the-reserved-attribute-names-that-become-protected-attributes/172786/1 "2009-07-28T01:48:00Z")
I just ran into the concept of protected attributes in ActiveRecord when I tried to add a field/column with the name ‘type’. Is there any documentation on the reserved names that are considered protected by default? I haven’t been able to find anything conclusive. Thanks. ---
**Author:** ![ate50eggs](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/fbc32d/32.png) [@ate50eggs](https://www.ruby-forum.com/u/ate50eggs)\ **Post date:** [July 28, 2009, 2:00am UTC](https://www.ruby-forum.com/t/activerecord-what-are-the-reserved-attribute-names-that-become-protected-attributes/172786/2 "2009-07-28T02:00:17Z")
On Mon, Jul 27, 2009 at 4:46 PM, Nathan B.[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I just ran into the concept of protected attributes in ActiveRecord > when I tried to add a field/column with the name ‘type’. Is there any > documentation on the reserved names that are considered protected by > default? I haven’t been able to find anything conclusive. ? googling “rails reserved words” brings this up as #1: [http://wiki.rubyonrails.org/rails/pages/ReservedWords](http://wiki.rubyonrails.org/rails/pages/ReservedWords) – Hassan S. ------------------------ removed\_email\_address@domain.invalid twitter: @hassan