mirror of
https://github.com/django/django.git
synced 2024-12-23 17:46:27 +00:00
26 lines
1.1 KiB
Python
26 lines
1.1 KiB
Python
from django.db.models import CharField, Value
|
|
from django.db.models.functions import Left, Ord
|
|
from django.test import TestCase
|
|
from django.test.utils import register_lookup
|
|
|
|
from ..models import Author
|
|
|
|
|
|
class OrdTests(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.rhonda = Author.objects.create(name='Rhonda')
|
|
|
|
def test_basic(self):
|
|
authors = Author.objects.annotate(name_part=Ord('name'))
|
|
self.assertCountEqual(authors.filter(name_part__gt=Ord(Value('John'))), [self.elena, self.rhonda])
|
|
self.assertCountEqual(authors.exclude(name_part__gt=Ord(Value('John'))), [self.john])
|
|
|
|
def test_transform(self):
|
|
with register_lookup(CharField, Ord):
|
|
authors = Author.objects.annotate(first_initial=Left('name', 1))
|
|
self.assertCountEqual(authors.filter(first_initial__ord=ord('J')), [self.john])
|
|
self.assertCountEqual(authors.exclude(first_initial__ord=ord('J')), [self.elena, self.rhonda])
|