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57 lines
2.1 KiB
Python
57 lines
2.1 KiB
Python
from django.db import connection
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from django.db.models import F, Value
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from django.db.models.functions import Collate
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from django.test import TestCase
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from ..models import Author
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class CollateTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.author1 = Author.objects.create(alias='a', name='Jones 1')
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cls.author2 = Author.objects.create(alias='A', name='Jones 2')
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def test_collate_filter_ci(self):
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collation = connection.features.test_collations.get('ci')
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if not collation:
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self.skipTest(
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'This backend does not support case-insensitive collations.'
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)
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qs = Author.objects.filter(alias=Collate(Value('a'), collation))
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self.assertEqual(qs.count(), 2)
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def test_collate_order_by_cs(self):
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collation = connection.features.test_collations.get('cs')
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if not collation:
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self.skipTest(
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'This backend does not support case-sensitive collations.'
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)
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qs = Author.objects.order_by(Collate('alias', collation))
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self.assertSequenceEqual(qs, [self.author2, self.author1])
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def test_language_collation_order_by(self):
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collation = connection.features.test_collations.get('swedish_ci')
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if not collation:
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self.skipTest('This backend does not support language collations.')
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author3 = Author.objects.create(alias='O', name='Jones')
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author4 = Author.objects.create(alias='Ö', name='Jones')
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author5 = Author.objects.create(alias='P', name='Jones')
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qs = Author.objects.order_by(Collate(F('alias'), collation), 'name')
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self.assertSequenceEqual(
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qs,
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[self.author1, self.author2, author3, author5, author4],
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)
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def test_invalid_collation(self):
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tests = [
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None,
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'',
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'et-x-icu" OR ',
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'"schema"."collation"',
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]
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msg = "Invalid collation name: %r."
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for value in tests:
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with self.subTest(value), self.assertRaisesMessage(ValueError, msg % value):
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Collate(F('alias'), value)
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