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124 lines
4.7 KiB
Python
124 lines
4.7 KiB
Python
from __future__ import absolute_import
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from datetime import date
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import traceback
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import warnings
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from django.db import IntegrityError, DatabaseError
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from django.utils.encoding import DjangoUnicodeDecodeError
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from django.test import TestCase, TransactionTestCase
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from .models import Person, ManualPrimaryKeyTest, Profile, Tag, Thing
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class GetOrCreateTests(TestCase):
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def test_get_or_create(self):
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p = Person.objects.create(
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first_name='John', last_name='Lennon', birthday=date(1940, 10, 9)
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)
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p, created = Person.objects.get_or_create(
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first_name="John", last_name="Lennon", defaults={
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"birthday": date(1940, 10, 9)
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}
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)
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self.assertFalse(created)
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self.assertEqual(Person.objects.count(), 1)
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p, created = Person.objects.get_or_create(
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first_name='George', last_name='Harrison', defaults={
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'birthday': date(1943, 2, 25)
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}
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)
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self.assertTrue(created)
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self.assertEqual(Person.objects.count(), 2)
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# If we execute the exact same statement, it won't create a Person.
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p, created = Person.objects.get_or_create(
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first_name='George', last_name='Harrison', defaults={
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'birthday': date(1943, 2, 25)
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}
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)
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self.assertFalse(created)
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self.assertEqual(Person.objects.count(), 2)
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# If you don't specify a value or default value for all required
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# fields, you will get an error.
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self.assertRaises(IntegrityError,
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Person.objects.get_or_create, first_name="Tom", last_name="Smith"
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)
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# If you specify an existing primary key, but different other fields,
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# then you will get an error and data will not be updated.
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m = ManualPrimaryKeyTest.objects.create(id=1, data="Original")
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self.assertRaises(IntegrityError,
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ManualPrimaryKeyTest.objects.get_or_create, id=1, data="Different"
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)
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self.assertEqual(ManualPrimaryKeyTest.objects.get(id=1).data, "Original")
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# get_or_create should raise IntegrityErrors with the full traceback.
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# This is tested by checking that a known method call is in the traceback.
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# We cannot use assertRaises/assertRaises here because we need to inspect
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# the actual traceback. Refs #16340.
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try:
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ManualPrimaryKeyTest.objects.get_or_create(id=1, data="Different")
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except IntegrityError as e:
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formatted_traceback = traceback.format_exc()
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self.assertIn('obj.save', formatted_traceback)
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def test_savepoint_rollback(self):
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# Regression test for #20463: the database connection should still be
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# usable after a DataError or ProgrammingError in .get_or_create().
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try:
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# Hide warnings when broken data is saved with a warning (MySQL).
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with warnings.catch_warnings():
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warnings.simplefilter('ignore')
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Person.objects.get_or_create(
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birthday=date(1970, 1, 1),
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defaults={'first_name': b"\xff", 'last_name': b"\xff"})
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except (DatabaseError, DjangoUnicodeDecodeError):
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Person.objects.create(
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first_name="Bob", last_name="Ross", birthday=date(1950, 1, 1))
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else:
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self.skipTest("This backend accepts broken utf-8.")
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class GetOrCreateTransactionTests(TransactionTestCase):
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def test_get_or_create_integrityerror(self):
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# Regression test for #15117. Requires a TransactionTestCase on
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# databases that delay integrity checks until the end of transactions,
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# otherwise the exception is never raised.
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try:
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Profile.objects.get_or_create(person=Person(id=1))
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except IntegrityError:
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pass
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else:
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self.skipTest("This backend does not support integrity checks.")
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class GetOrCreateThroughManyToMany(TestCase):
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def test_get_get_or_create(self):
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tag = Tag.objects.create(text='foo')
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a_thing = Thing.objects.create(name='a')
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a_thing.tags.add(tag)
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obj, created = a_thing.tags.get_or_create(text='foo')
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self.assertFalse(created)
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self.assertEqual(obj.pk, tag.pk)
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def test_create_get_or_create(self):
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a_thing = Thing.objects.create(name='a')
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obj, created = a_thing.tags.get_or_create(text='foo')
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self.assertTrue(created)
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self.assertEqual(obj.text, 'foo')
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self.assertIn(obj, a_thing.tags.all())
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def test_something(self):
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Tag.objects.create(text='foo')
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a_thing = Thing.objects.create(name='a')
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self.assertRaises(IntegrityError, a_thing.tags.get_or_create, text='foo')
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