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-rw-r--r--docs/ref/models/querysets.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/ref/models/querysets.txt b/docs/ref/models/querysets.txt
index e494739bcd..9bfaea025d 100644
--- a/docs/ref/models/querysets.txt
+++ b/docs/ref/models/querysets.txt
@@ -3188,6 +3188,8 @@ As a convenience when no lookup type is provided (like in
Exact match. If the value provided for comparison is ``None``, it will be
interpreted as an SQL ``NULL`` (see :lookup:`isnull` for more details).
+:lookup:`Key and index lookups <jsonfield.key>` are exceptions: they
+interpret ``None`` as JSON ``null`` instead.
Examples::