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Diffstat (limited to 'tests/annotations')
| -rw-r--r-- | tests/annotations/tests.py | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/annotations/tests.py b/tests/annotations/tests.py index 29660a827e..5df958c333 100644 --- a/tests/annotations/tests.py +++ b/tests/annotations/tests.py @@ -969,6 +969,24 @@ class NonAggregateAnnotationTestCase(TestCase): ): Book.objects.annotate(BooleanField(), Value(False), is_book=True) + def test_complex_annotations_must_have_an_alias(self): + complex_annotations = [ + F("rating") * F("price"), + Value("title"), + Case(When(pages__gte=400, then=Value("Long")), default=Value("Short")), + Subquery( + Book.objects.filter(publisher_id=OuterRef("pk")) + .order_by("-pubdate") + .values("name")[:1] + ), + Exists(Book.objects.filter(publisher_id=OuterRef("pk"))), + ] + msg = "Complex annotations require an alias" + for annotation in complex_annotations: + with self.subTest(annotation=annotation): + with self.assertRaisesMessage(TypeError, msg): + Book.objects.annotate(annotation) + def test_chaining_annotation_filter_with_m2m(self): qs = ( Author.objects.filter( |