rails/rails — pull request #12333 by rystraum (2013-09-24 08:55:38+00:00)
Title: Rewrote belongs_to :dependent options to be consistent with other associations

Based on https://github.com/rails/rails/issues/2502, the :restrict option was removed.

I rewrote the section to be more consistent with the other associations' :dependent option section and added in a note to prevent deletion of the object, ala :restrict.