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-rw-r--r--docs/ref/checks.txt2
-rw-r--r--docs/ref/models/fields.txt4
2 files changed, 6 insertions, 0 deletions
diff --git a/docs/ref/checks.txt b/docs/ref/checks.txt
index 85cd616253..f008661319 100644
--- a/docs/ref/checks.txt
+++ b/docs/ref/checks.txt
@@ -148,6 +148,8 @@ Related Fields
* **fields.E338**: The intermediary model ``<through model>`` has no field
``<field name>``.
* **fields.E339**: ``<model>.<field name>`` is not a foreign key to ``<model>``.
+* **fields.W340**: ``null`` has no effect on ``ManyToManyField``.
+* **fields.W341**: ``ManyToManyField`` does not support ``validators``.
Signals
~~~~~~~
diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index a99522c77c..3a64ad934a 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -1448,6 +1448,10 @@ that control how the relationship functions.
If in doubt, leave it to its default of ``True``.
+:class:`ManyToManyField` does not support :attr:`~Field.validators`.
+
+:attr:`~Field.null` has no effect since there is no way to require a
+relationship at the database level.
.. _ref-onetoone: