mirror of
https://github.com/django/django.git
synced 2024-12-23 17:46:27 +00:00
56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
from django.db.models import F, Value
|
|
from django.db.models.functions import Concat, Replace
|
|
from django.test import TestCase
|
|
|
|
from .models import Author
|
|
|
|
|
|
class ReplaceTests(TestCase):
|
|
|
|
@classmethod
|
|
def setUpTestData(cls):
|
|
Author.objects.create(name='George R. R. Martin')
|
|
Author.objects.create(name='J. R. R. Tolkien')
|
|
|
|
def test_replace_with_empty_string(self):
|
|
qs = Author.objects.annotate(
|
|
without_middlename=Replace(F('name'), Value('R. R. '), Value('')),
|
|
)
|
|
self.assertQuerysetEqual(qs, [
|
|
('George R. R. Martin', 'George Martin'),
|
|
('J. R. R. Tolkien', 'J. Tolkien'),
|
|
], transform=lambda x: (x.name, x.without_middlename), ordered=False)
|
|
|
|
def test_case_sensitive(self):
|
|
qs = Author.objects.annotate(same_name=Replace(F('name'), Value('r. r.'), Value('')))
|
|
self.assertQuerysetEqual(qs, [
|
|
('George R. R. Martin', 'George R. R. Martin'),
|
|
('J. R. R. Tolkien', 'J. R. R. Tolkien'),
|
|
], transform=lambda x: (x.name, x.same_name), ordered=False)
|
|
|
|
def test_replace_expression(self):
|
|
qs = Author.objects.annotate(same_name=Replace(
|
|
Concat(Value('Author: '), F('name')), Value('Author: '), Value('')),
|
|
)
|
|
self.assertQuerysetEqual(qs, [
|
|
('George R. R. Martin', 'George R. R. Martin'),
|
|
('J. R. R. Tolkien', 'J. R. R. Tolkien'),
|
|
], transform=lambda x: (x.name, x.same_name), ordered=False)
|
|
|
|
def test_update(self):
|
|
Author.objects.update(
|
|
name=Replace(F('name'), Value('R. R. '), Value('')),
|
|
)
|
|
self.assertQuerysetEqual(Author.objects.all(), [
|
|
('George Martin'),
|
|
('J. Tolkien'),
|
|
], transform=lambda x: x.name, ordered=False)
|
|
|
|
def test_replace_with_default_arg(self):
|
|
# The default replacement is an empty string.
|
|
qs = Author.objects.annotate(same_name=Replace(F('name'), Value('R. R. ')))
|
|
self.assertQuerysetEqual(qs, [
|
|
('George R. R. Martin', 'George Martin'),
|
|
('J. R. R. Tolkien', 'J. Tolkien'),
|
|
], transform=lambda x: (x.name, x.same_name), ordered=False)
|