diff --git a/AUTHORS b/AUTHORS
index 7e287e75ed..28169c3e17 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -707,6 +707,7 @@ answer newbie questions, and generally made Django that much better:
Matt Dennenbaum
Matthew Flanagan
Matthew Schinckel
+ Matthew Shirley
Matthew Somerville
Matthew Tretter
Matthew Wilkes
diff --git a/django/db/models/query.py b/django/db/models/query.py
index a2af672546..70177667a6 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -1338,6 +1338,8 @@ class QuerySet(AltersData):
self._not_support_combined_queries("update")
if self.query.is_sliced:
raise TypeError("Cannot update a query once a slice has been taken.")
+ if self.query.distinct_fields:
+ raise TypeError("Cannot call update() after .distinct(*fields).")
self._for_write = True
query = self.query.chain(sql.UpdateQuery)
query.add_update_values(kwargs)
diff --git a/tests/distinct_on_fields/tests.py b/tests/distinct_on_fields/tests.py
index 93b3f27aec..f03e05ac73 100644
--- a/tests/distinct_on_fields/tests.py
+++ b/tests/distinct_on_fields/tests.py
@@ -178,3 +178,9 @@ class DistinctOnTests(TestCase):
.order_by("nAmEAlIaS")
)
self.assertSequenceEqual(qs, [self.p1_o1, self.p2_o1, self.p3_o1])
+
+ def test_disallowed_update_distinct_on(self):
+ qs = Staff.objects.distinct("organisation").order_by("organisation")
+ msg = "Cannot call update() after .distinct(*fields)."
+ with self.assertRaisesMessage(TypeError, msg):
+ qs.update(name="p4")