[3.0.x] Fixed #30854 -- Fixed QuerySet.select_related() with multiple FilteredRelations.

Backport of 6a75cea76a98c08bf2e20d787be9b14c2cd94860 from master.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/filtered_relation/tests.py b/tests/filtered_relation/tests.py
index 52fe64dfa5..e80a94c164 100644
--- a/tests/filtered_relation/tests.py
+++ b/tests/filtered_relation/tests.py
@@ -50,6 +50,18 @@ class FilteredRelationTests(TestCase):
                 (self.author2, self.book3, self.editor_b, self.author2),
             ], lambda x: (x, x.book_join, x.book_join.editor, x.book_join.author))
 
+    def test_select_related_multiple(self):
+        qs = Book.objects.annotate(
+            author_join=FilteredRelation('author'),
+            editor_join=FilteredRelation('editor'),
+        ).select_related('author_join', 'editor_join').order_by('pk')
+        self.assertQuerysetEqual(qs, [
+            (self.book1, self.author1, self.editor_a),
+            (self.book2, self.author2, self.editor_b),
+            (self.book3, self.author2, self.editor_b),
+            (self.book4, self.author1, self.editor_a),
+        ], lambda x: (x, x.author_join, x.editor_join))
+
     def test_select_related_with_empty_relation(self):
         qs = Author.objects.annotate(
             book_join=FilteredRelation('book', condition=Q(pk=-1)),