80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
from django.db.models import CharField, 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 .models import Author
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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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'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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'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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class UpperBilateral(Upper):
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bilateral = True
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try:
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CharField.register_lookup(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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'John Smith',
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],
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lambda a: a.name
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)
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finally:
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CharField._unregister_lookup(UpperBilateral)
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def test_func_transform_bilateral_multivalue(self):
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class UpperBilateral(Upper):
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bilateral = True
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try:
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CharField.register_lookup(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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'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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finally:
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CharField._unregister_lookup(UpperBilateral)
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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'], 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'], lambda x: x.name
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)
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