Ticket #10786: fields-10786.diff

docs/ref/models/fields.txt

@@ -53 +53 @@
 have two possible values for "no data;" Django convention is to use the empty
 string, not ``NULL``.
 
+If you need to accept :attr:`~Field.null` values with :class:`BooleanField`, use
+:class:`NullBooleanField` instead.
+
 .. note::
 
     When using the Oracle database backend, the ``null=True`` option will be
@@ -306 +309 @@
 
 A true/false field.
 
+If you need to accept :attr:`~Field.null` values with :class:`BooleanField`, use
+:class:`NullBooleanField` instead.
+
 The admin represents this as a checkbox.
 
 .. admonition:: MySQL users..