Fixed #32690 -- Fixed __in lookup crash when combining with filtered aggregates.

Having lookups group by subquery right-hand-sides is likely unnecessary
in the first place but relatively large amount of work would be needed
to achieve that such as making Lookup instances proper resolvable
expressions.

Regression in 35431298226165986ad07e91f9d3aca721ff38ec.

Thanks James A. Munsch for the report.

django/db/models/lookups.py

@@ -406,6 +406,15 @@ class In(FieldGetDbPrepValueIterableMixin, BuiltinLookup):
                 self.rhs.add_fields(['pk'])
             return super().process_rhs(compiler, connection)
 
+    def get_group_by_cols(self, alias=None):
+        cols = self.lhs.get_group_by_cols()
+        if hasattr(self.rhs, 'get_group_by_cols'):
+            if not getattr(self.rhs, 'has_select_fields', True):
+                self.rhs.clear_select_clause()
+                self.rhs.add_fields(['pk'])
+            cols.extend(self.rhs.get_group_by_cols())
+        return cols
+
     def get_rhs_op(self, connection, rhs):
         return 'IN %s' % rhs
 

tests/aggregation_regress/tests.py

@@ -1525,6 +1525,14 @@ class AggregationTests(TestCase):
             allow_distinct = True
         DistinctAggregate('foo', distinct=True)
 
+    @skipUnlessDBFeature('supports_subqueries_in_group_by')
+    def test_having_subquery_select(self):
+        authors = Author.objects.filter(pk=self.a1.pk)
+        books = Book.objects.annotate(Count('authors')).filter(
+            Q(authors__in=authors) | Q(authors__count__gt=2)
+        )
+        self.assertEqual(set(books), {self.b1, self.b4})
+
 
 class JoinPromotionTests(TestCase):
     def test_ticket_21150(self):