From cc80979f011c72f8b4b5f35a5a36f049bc07bf0e Mon Sep 17 00:00:00 2001 From: Mariusz Felisiak Date: Tue, 21 May 2019 18:29:08 +0200 Subject: [PATCH] Refs #26192 -- Added tests for ordering by constant value. --- tests/ordering/tests.py | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/tests/ordering/tests.py b/tests/ordering/tests.py index 1466d350a1..e5f56917d4 100644 --- a/tests/ordering/tests.py +++ b/tests/ordering/tests.py @@ -1,7 +1,10 @@ from datetime import datetime from operator import attrgetter -from django.db.models import Count, DateTimeField, F, Max, OuterRef, Subquery +from django.core.exceptions import FieldError +from django.db.models import ( + CharField, Count, DateTimeField, F, Max, OuterRef, Subquery, Value, +) from django.db.models.functions import Upper from django.test import TestCase from django.utils.deprecation import RemovedInDjango31Warning @@ -402,6 +405,18 @@ class OrderingTests(TestCase): attrgetter("headline") ) + def test_order_by_annotated_constant_value(self): + qs = Article.objects.annotate( + constant=Value('1', output_field=CharField()), + ).order_by('constant', '-headline') + self.assertSequenceEqual(qs, [self.a4, self.a3, self.a2, self.a1]) + + def test_order_by_constant_value_without_output_field(self): + msg = 'Cannot resolve expression type, unknown output_field' + qs = Article.objects.annotate(constant=Value('1')).order_by('constant') + with self.assertRaisesMessage(FieldError, msg): + qs.first() + def test_related_ordering_duplicate_table_reference(self): """ An ordering referencing a model with an ordering referencing a model