Refs -- Added note to ModelAdmin.list_filter docs that GenericForeignKeys are not supported.
@@ -992,6 +992,11 @@ subclass::
The ``FieldListFilter`` API is considered internal and might be
changed.
+ .. note::
+
+ The :class:`~django.contrib.contenttypes.fields.GenericForeignKey`
+ field is not supported.
+
.. versionadded:: 3.1
The ``EmptyFieldListFilter`` class was added.
