79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
from django.db.models import CharField
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from django.db.models import Value as V
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from django.db.models.functions import Coalesce, Length, Upper
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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 UpperBilateral(Upper):
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bilateral = True
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class FunctionTests(TestCase):
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def test_nested_function_ordering(self):
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Author.objects.create(name="John Smith")
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Author.objects.create(name="Rhonda Simpson", alias="ronny")
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authors = Author.objects.order_by(Length(Coalesce("alias", "name")))
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self.assertQuerysetEqual(
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authors,
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[
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"Rhonda Simpson",
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"John Smith",
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],
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lambda a: a.name,
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)
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authors = Author.objects.order_by(Length(Coalesce("alias", "name")).desc())
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self.assertQuerysetEqual(
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authors,
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[
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"John Smith",
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"Rhonda Simpson",
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],
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lambda a: a.name,
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)
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def test_func_transform_bilateral(self):
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with register_lookup(CharField, UpperBilateral):
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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__upper__exact="john smith")
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self.assertQuerysetEqual(
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authors.order_by("name"),
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[
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"John Smith",
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],
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lambda a: a.name,
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)
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def test_func_transform_bilateral_multivalue(self):
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with register_lookup(CharField, UpperBilateral):
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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__upper__in=["john smith", "rhonda"])
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self.assertQuerysetEqual(
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authors.order_by("name"),
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[
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"John Smith",
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"Rhonda",
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],
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lambda a: a.name,
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)
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def test_function_as_filter(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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self.assertQuerysetEqual(
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Author.objects.filter(alias=Upper(V("smithj"))),
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["John Smith"],
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lambda x: x.name,
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)
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self.assertQuerysetEqual(
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Author.objects.exclude(alias=Upper(V("smithj"))),
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["Rhonda"],
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lambda x: x.name,
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)
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