Refs -- Doc'd limitation of using pattern lookups with UUIDField on PostgreSQL.
@@ -1304,6 +1304,13 @@ it is recommended to use :attr:`~Field.default`::
Note that a callable (with the parentheses omitted) is passed to ``default``,
not an instance of ``UUID``.
+.. admonition:: Lookups on PostgreSQL
+
+ Using :lookup:`iexact`, :lookup:`contains`, :lookup:`icontains`,
+ :lookup:`startswith`, :lookup:`istartswith`, :lookup:`endswith`, or
+ :lookup:`iendswith` lookups on PostgreSQL don't work for values without
+ hyphens, because PostgreSQL stores them in a hyphenated uuid datatype type.
+
Relationship fields
===================
