From 6607618afd88810aeb1dad5dbecf0273faf2cc05 Mon Sep 17 00:00:00 2001
From: Ryuta Kamizono <kamipo@gmail.com>
Date: Thu, 16 Jan 2020 07:05:20 +0900
Subject: [PATCH] If `dependent: nil` is valid for has_many, it also be valid
 for has_one

Follow up #35504.

[ci skip]
---
 activerecord/lib/active_record/associations.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index ed9d185fe4..06117c8fd2 100644
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1434,6 +1434,7 @@ module ActiveRecord
         #   Controls what happens to the associated object when
         #   its owner is destroyed:
         #
+        #   * <tt>nil</tt> do nothing (default).
         #   * <tt>:destroy</tt> causes the associated object to also be destroyed
         #   * <tt>:delete</tt> causes the associated object to be deleted directly from the database (so callbacks will not execute)
         #   * <tt>:nullify</tt> causes the foreign key to be set to +NULL+. Polymorphic type column is also nullified