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"""
The citext PostgreSQL extension supports indexing of case-insensitive text
strings and thus eliminates the need for operations such as iexact and other
modifiers to enforce use of an index.
"""
from django.db import IntegrityError
from . import PostgreSQLTestCase
from .models import CITestModel
class CITextTestCase(PostgreSQLTestCase):
@classmethod
def setUpTestData(cls):
cls.john = CITestModel.objects.create(
name='JoHn',
email='joHn@johN.com',
description='Average Joe named JoHn',
)
def test_equal_lowercase(self):
"""
citext removes the need for iexact as the index is case-insensitive.
"""
self.assertEqual(CITestModel.objects.filter(name=self.john.name.lower()).count(), 1)
self.assertEqual(CITestModel.objects.filter(email=self.john.email.lower()).count(), 1)
self.assertEqual(CITestModel.objects.filter(description=self.john.description.lower()).count(), 1)
def test_fail_citext_primary_key(self):
"""
Creating an entry for a citext field used as a primary key which
clashes with an existing value isn't allowed.
"""
with self.assertRaises(IntegrityError):
CITestModel.objects.create(name='John')
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