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47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
from django.db.models import CharField
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from django.db.models.functions import Length
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from django.test import TestCase
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from django.test.utils import register_lookup
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from ..models import Author
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class LengthTests(TestCase):
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def test_basic(self):
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Author.objects.create(name="John Smith", alias="smithj")
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Author.objects.create(name="Rhonda")
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authors = Author.objects.annotate(
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name_length=Length("name"),
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alias_length=Length("alias"),
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)
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self.assertQuerysetEqual(
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authors.order_by("name"),
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[(10, 6), (6, None)],
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lambda a: (a.name_length, a.alias_length),
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)
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self.assertEqual(authors.filter(alias_length__lte=Length("name")).count(), 1)
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def test_ordering(self):
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Author.objects.create(name="John Smith", alias="smithj")
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Author.objects.create(name="John Smith", alias="smithj1")
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Author.objects.create(name="Rhonda", alias="ronny")
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authors = Author.objects.order_by(Length("name"), Length("alias"))
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self.assertQuerysetEqual(
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authors,
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[
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("Rhonda", "ronny"),
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("John Smith", "smithj"),
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("John Smith", "smithj1"),
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],
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lambda a: (a.name, a.alias),
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)
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def test_transform(self):
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with register_lookup(CharField, Length):
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Author.objects.create(name="John Smith", alias="smithj")
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Author.objects.create(name="Rhonda")
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authors = Author.objects.filter(name__length__gt=7)
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self.assertQuerysetEqual(
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authors.order_by("name"), ["John Smith"], lambda a: a.name
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)
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