Joseph Weakley's Profile

attr_accessible can also take an option role using the :as option which allows you to define multiple levels of accessors. You can then use the :as option with new, create, create!, update_attributes, and update_attributes! methods to use the different levels of accessors. Alternatively you could use :without_protection => true if you wanted to bypass all of the mass assignment protection for a single statement, e.g., in a seed file.

http://guides.rubyonrails.org/security.html#countermeasures