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[3.2.x] Fixed #32392 -- Fixed ExclusionConstraint crash with Cast() in expressions.

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Backport of fdfbc66331 from master
This commit is contained in:
Tilman Koschnick 2021-01-28 17:50:54 +01:00 • committed by Mariusz Felisiak
parent f4d51e12ae
commit 18cac6bbfb
4 changed files with 15 additions and 23 deletions
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15
tests/db_functions/comparison/test_cast.py
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@ -1,12 +1,9 @@
import datetime
import decimal
import unittest
from django.db import connection, models
from django.db.models.functions import Cast
from django.test import (
TestCase, ignore_warnings, override_settings, skipUnlessDBFeature,
)
from django.test import TestCase, ignore_warnings, skipUnlessDBFeature
from ..models import Author, DTModel, Fan, FloatModel
@ -128,15 +125,5 @@ class CastTests(TestCase):
self.assertIsInstance(cast_float, float)
self.assertEqual(cast_float, 0.125)
@unittest.skipUnless(connection.vendor == 'postgresql', 'PostgreSQL test')
@override_settings(DEBUG=True)
def test_expression_wrapped_with_parentheses_on_postgresql(self):
"""
The SQL for the Cast expression is wrapped with parentheses in case
it's a complex expression.
"""
list(Author.objects.annotate(cast_float=Cast(models.Avg('age'), models.FloatField())))
self.assertIn('(AVG("db_functions_author"."age"))::double precision', connection.queries[-1]['sql'])
def test_cast_to_text_field(self):
self.assertEqual(Author.objects.values_list(Cast('age', models.TextField()), flat=True).get(), '1')