Fixed -- Added note about using JSONField key lookups with QuerySet.exclude() in docs.
@@ -910,6 +910,14 @@ To query for missing keys, use the ``isnull`` lookup::
:lookup:`istartswith`, :lookup:`lt`, :lookup:`lte`, :lookup:`gt`, and
:lookup:`gte`, as well as with :ref:`containment-and-key-lookups`.
+.. note::
+
+ Due to the way in which key-path queries work,
+ :meth:`~django.db.models.query.QuerySet.exclude` and
+ :meth:`~django.db.models.query.QuerySet.filter` are not guaranteed to
+ produce exhaustive sets. If you want to include objects that do not have
+ the path, add the ``isnull`` lookup.
+
.. warning::
Since any string could be a key in a JSON object, any lookup other than
