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-rw-r--r--guides/source/association_basics.md4
1 files changed, 2 insertions, 2 deletions
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md
index 4f3e8b2cff..38e46e4bf8 100644
--- a/guides/source/association_basics.md
+++ b/guides/source/association_basics.md
@@ -1257,7 +1257,7 @@ Controls what happens to the associated object when its owner is destroyed:
* `:destroy` causes the associated object to also be destroyed
* `:delete` causes the associated object to be deleted directly from the database (so callbacks will not execute)
-* `:nullify` causes the foreign key to be set to `NULL`. Callbacks are not executed.
+* `:nullify` causes the foreign key to be set to `NULL`. Polymorphic type column is also nullified on polymorphic associations. Callbacks are not executed.
* `:restrict_with_exception` causes an `ActiveRecord::DeleteRestrictionError` exception to be raised if there is an associated record
* `:restrict_with_error` causes an error to be added to the owner if there is an associated object
@@ -1658,7 +1658,7 @@ Controls what happens to the associated objects when their owner is destroyed:
* `:destroy` causes all the associated objects to also be destroyed
* `:delete_all` causes all the associated objects to be deleted directly from the database (so callbacks will not execute)
-* `:nullify` causes the foreign keys to be set to `NULL`. Callbacks are not executed.
+* `:nullify` causes the foreign key to be set to `NULL`. Polymorphic type column is also nullified on polymorphic associations. Callbacks are not executed.
* `:restrict_with_exception` causes an `ActiveRecord::DeleteRestrictionError` exception to be raised if there are any associated records
* `:restrict_with_error` causes an error to be added to the owner if there are any associated objects