Refs #30727 -- Added tests for Subquery with queryset in kwargs pickle without evaluating it.

felixxm · felixxm · commit b739f2e91d68 · 2020-05-19T22:44:57.000+02:00
diff --git a/tests/queryset_pickle/tests.py b/tests/queryset_pickle/tests.py
@@ -195,6 +195,18 @@ def test_pickle_exists_queryset_not_evaluated(self):
         with self.assertNumQueries(0):
             self.assert_pickles(groups)
 
+    def test_pickle_exists_kwargs_queryset_not_evaluated(self):
+        group = Group.objects.create(name='group')
+        Event.objects.create(title='event', group=group)
+        groups = Group.objects.annotate(
+            has_event=models.Exists(
+                queryset=Event.objects.filter(group_id=models.OuterRef('id')),
+            ),
+        )
+        list(groups)  # evaluate QuerySet.
+        with self.assertNumQueries(0):
+            self.assert_pickles(groups)
+
     def test_pickle_subquery_queryset_not_evaluated(self):
         group = Group.objects.create(name='group')
         Event.objects.create(title='event', group=group)
