mirror of
https://github.com/django/django.git
synced 2024-12-24 01:55:49 +00:00
abf8e390a4
Thanks Mariusz Felisiak for Oracle advice and review.
47 lines
2.0 KiB
Python
47 lines
2.0 KiB
Python
from django.db import connection
|
|
from django.db.models import CharField
|
|
from django.db.models.functions import Length, Reverse, Trim
|
|
from django.test import TestCase
|
|
from django.test.utils import register_lookup
|
|
|
|
from ..models import Author
|
|
|
|
|
|
class ReverseTests(TestCase):
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
cls.john = Author.objects.create(name='John Smith', alias='smithj')
|
|
cls.elena = Author.objects.create(name='Élena Jordan', alias='elena')
|
|
cls.python = Author.objects.create(name='パイソン')
|
|
|
|
def test_null(self):
|
|
author = Author.objects.annotate(backward=Reverse('alias')).get(pk=self.python.pk)
|
|
self.assertEqual(author.backward, '' if connection.features.interprets_empty_strings_as_nulls else None)
|
|
|
|
def test_basic(self):
|
|
authors = Author.objects.annotate(backward=Reverse('name'))
|
|
self.assertQuerysetEqual(
|
|
authors,
|
|
[
|
|
('John Smith', 'htimS nhoJ'),
|
|
('Élena Jordan', 'nadroJ anelÉ'),
|
|
('パイソン', 'ンソイパ'),
|
|
],
|
|
lambda a: (a.name, a.backward),
|
|
ordered=False,
|
|
)
|
|
|
|
def test_transform(self):
|
|
with register_lookup(CharField, Reverse):
|
|
authors = Author.objects.all()
|
|
self.assertCountEqual(authors.filter(name__reverse=self.john.name[::-1]), [self.john])
|
|
self.assertCountEqual(authors.exclude(name__reverse=self.john.name[::-1]), [self.elena, self.python])
|
|
|
|
def test_expressions(self):
|
|
author = Author.objects.annotate(backward=Reverse(Trim('name'))).get(pk=self.john.pk)
|
|
self.assertEqual(author.backward, self.john.name[::-1])
|
|
with register_lookup(CharField, Reverse), register_lookup(CharField, Length):
|
|
authors = Author.objects.all()
|
|
self.assertCountEqual(authors.filter(name__reverse__length__gt=7), [self.john, self.elena])
|
|
self.assertCountEqual(authors.exclude(name__reverse__length__gt=7), [self.python])
|