mirror of https://github.com/django/django.git
84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
from django.db.models import F, Value
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from django.db.models.functions import Concat, Replace
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from django.test import TestCase
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from ..models import Author
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class ReplaceTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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Author.objects.create(name="George R. R. Martin")
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Author.objects.create(name="J. R. R. Tolkien")
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def test_replace_with_empty_string(self):
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qs = Author.objects.annotate(
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without_middlename=Replace(F("name"), Value("R. R. "), Value("")),
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)
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self.assertQuerySetEqual(
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qs,
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[
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("George R. R. Martin", "George Martin"),
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("J. R. R. Tolkien", "J. Tolkien"),
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],
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transform=lambda x: (x.name, x.without_middlename),
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ordered=False,
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)
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def test_case_sensitive(self):
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qs = Author.objects.annotate(
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same_name=Replace(F("name"), Value("r. r."), Value(""))
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)
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self.assertQuerySetEqual(
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qs,
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[
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("George R. R. Martin", "George R. R. Martin"),
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("J. R. R. Tolkien", "J. R. R. Tolkien"),
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],
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transform=lambda x: (x.name, x.same_name),
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ordered=False,
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)
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def test_replace_expression(self):
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qs = Author.objects.annotate(
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same_name=Replace(
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Concat(Value("Author: "), F("name")), Value("Author: "), Value("")
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),
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)
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self.assertQuerySetEqual(
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qs,
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[
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("George R. R. Martin", "George R. R. Martin"),
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("J. R. R. Tolkien", "J. R. R. Tolkien"),
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],
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transform=lambda x: (x.name, x.same_name),
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ordered=False,
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)
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def test_update(self):
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Author.objects.update(
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name=Replace(F("name"), Value("R. R. "), Value("")),
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)
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self.assertQuerySetEqual(
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Author.objects.all(),
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[
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("George Martin"),
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("J. Tolkien"),
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],
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transform=lambda x: x.name,
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ordered=False,
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)
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def test_replace_with_default_arg(self):
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# The default replacement is an empty string.
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qs = Author.objects.annotate(same_name=Replace(F("name"), Value("R. R. ")))
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self.assertQuerySetEqual(
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qs,
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[
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("George R. R. Martin", "George Martin"),
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("J. R. R. Tolkien", "J. Tolkien"),
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],
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transform=lambda x: (x.name, x.same_name),
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ordered=False,
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)
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