mirror of
https://github.com/django/django.git
synced 2024-12-30 21:16:26 +00:00
c9e538b174
Django imports threading in many other places without fallback.
Backport of 18f3e79b13 from master
425 lines
19 KiB
Python
425 lines
19 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import sys
|
|
import threading
|
|
import time
|
|
from unittest import skipIf, skipUnless
|
|
|
|
from django.db import (connection, transaction,
|
|
DatabaseError, Error, IntegrityError, OperationalError)
|
|
from django.test import TransactionTestCase, skipIfDBFeature, skipUnlessDBFeature
|
|
from django.utils import six
|
|
|
|
from .models import Reporter
|
|
|
|
|
|
@skipUnless(connection.features.uses_savepoints,
|
|
"'atomic' requires transactions and savepoints.")
|
|
class AtomicTests(TransactionTestCase):
|
|
"""
|
|
Tests for the atomic decorator and context manager.
|
|
|
|
The tests make assertions on internal attributes because there isn't a
|
|
robust way to ask the database for its current transaction state.
|
|
|
|
Since the decorator syntax is converted into a context manager (see the
|
|
implementation), there are only a few basic tests with the decorator
|
|
syntax and the bulk of the tests use the context manager syntax.
|
|
"""
|
|
|
|
available_apps = ['transactions']
|
|
|
|
def test_decorator_syntax_commit(self):
|
|
@transaction.atomic
|
|
def make_reporter():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
make_reporter()
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
def test_decorator_syntax_rollback(self):
|
|
@transaction.atomic
|
|
def make_reporter():
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
make_reporter()
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_alternate_decorator_syntax_commit(self):
|
|
@transaction.atomic()
|
|
def make_reporter():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
make_reporter()
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
def test_alternate_decorator_syntax_rollback(self):
|
|
@transaction.atomic()
|
|
def make_reporter():
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
make_reporter()
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_commit(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
def test_rollback(self):
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_nested_commit_commit(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
self.assertQuerysetEqual(Reporter.objects.all(),
|
|
['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
|
|
|
|
def test_nested_commit_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
def test_nested_rollback_commit(self):
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with transaction.atomic():
|
|
Reporter.objects.create(last_name="Haddock")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_nested_rollback_rollback(self):
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_merged_commit_commit(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
self.assertQuerysetEqual(Reporter.objects.all(),
|
|
['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
|
|
|
|
def test_merged_commit_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
# Writes in the outer block are rolled back too.
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_merged_rollback_commit(self):
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(last_name="Haddock")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_merged_rollback_rollback(self):
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_reuse_commit_commit(self):
|
|
atomic = transaction.atomic()
|
|
with atomic:
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with atomic:
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
self.assertQuerysetEqual(Reporter.objects.all(),
|
|
['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
|
|
|
|
def test_reuse_commit_rollback(self):
|
|
atomic = transaction.atomic()
|
|
with atomic:
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with atomic:
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
def test_reuse_rollback_commit(self):
|
|
atomic = transaction.atomic()
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with atomic:
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with atomic:
|
|
Reporter.objects.create(last_name="Haddock")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_reuse_rollback_rollback(self):
|
|
atomic = transaction.atomic()
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with atomic:
|
|
Reporter.objects.create(last_name="Tintin")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with atomic:
|
|
Reporter.objects.create(first_name="Haddock")
|
|
raise Exception("Oops, that's his last name")
|
|
raise Exception("Oops, that's his first name")
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_force_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
# atomic block shouldn't rollback, but force it.
|
|
self.assertFalse(transaction.get_rollback())
|
|
transaction.set_rollback(True)
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_prevent_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
sid = transaction.savepoint()
|
|
# trigger a database error inside an inner atomic without savepoint
|
|
with self.assertRaises(DatabaseError):
|
|
with transaction.atomic(savepoint=False):
|
|
with connection.cursor() as cursor:
|
|
cursor.execute(
|
|
"SELECT no_such_col FROM transactions_reporter")
|
|
# prevent atomic from rolling back since we're recovering manually
|
|
self.assertTrue(transaction.get_rollback())
|
|
transaction.set_rollback(False)
|
|
transaction.savepoint_rollback(sid)
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
|
|
class AtomicInsideTransactionTests(AtomicTests):
|
|
"""All basic tests for atomic should also pass within an existing transaction."""
|
|
|
|
def setUp(self):
|
|
self.atomic = transaction.atomic()
|
|
self.atomic.__enter__()
|
|
|
|
def tearDown(self):
|
|
self.atomic.__exit__(*sys.exc_info())
|
|
|
|
|
|
@skipIf(connection.features.autocommits_when_autocommit_is_off,
|
|
"This test requires a non-autocommit mode that doesn't autocommit.")
|
|
class AtomicWithoutAutocommitTests(AtomicTests):
|
|
"""All basic tests for atomic should also pass when autocommit is turned off."""
|
|
|
|
def setUp(self):
|
|
transaction.set_autocommit(False)
|
|
|
|
def tearDown(self):
|
|
# The tests access the database after exercising 'atomic', initiating
|
|
# a transaction ; a rollback is required before restoring autocommit.
|
|
transaction.rollback()
|
|
transaction.set_autocommit(True)
|
|
|
|
|
|
@skipUnless(connection.features.uses_savepoints,
|
|
"'atomic' requires transactions and savepoints.")
|
|
class AtomicMergeTests(TransactionTestCase):
|
|
"""Test merging transactions with savepoint=False."""
|
|
|
|
available_apps = ['transactions']
|
|
|
|
def test_merged_outer_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Calculus")
|
|
raise Exception("Oops, that's his last name")
|
|
# The third insert couldn't be roll back. Temporarily mark the
|
|
# connection as not needing rollback to check it.
|
|
self.assertTrue(transaction.get_rollback())
|
|
transaction.set_rollback(False)
|
|
self.assertEqual(Reporter.objects.count(), 3)
|
|
transaction.set_rollback(True)
|
|
# The second insert couldn't be roll back. Temporarily mark the
|
|
# connection as not needing rollback to check it.
|
|
self.assertTrue(transaction.get_rollback())
|
|
transaction.set_rollback(False)
|
|
self.assertEqual(Reporter.objects.count(), 3)
|
|
transaction.set_rollback(True)
|
|
# The first block has a savepoint and must roll back.
|
|
self.assertQuerysetEqual(Reporter.objects.all(), [])
|
|
|
|
def test_merged_inner_savepoint_rollback(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Tintin")
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
with transaction.atomic(savepoint=False):
|
|
Reporter.objects.create(first_name="Calculus")
|
|
raise Exception("Oops, that's his last name")
|
|
# The third insert couldn't be roll back. Temporarily mark the
|
|
# connection as not needing rollback to check it.
|
|
self.assertTrue(transaction.get_rollback())
|
|
transaction.set_rollback(False)
|
|
self.assertEqual(Reporter.objects.count(), 3)
|
|
transaction.set_rollback(True)
|
|
# The second block has a savepoint and must roll back.
|
|
self.assertEqual(Reporter.objects.count(), 1)
|
|
self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
|
|
|
|
|
|
@skipUnless(connection.features.uses_savepoints,
|
|
"'atomic' requires transactions and savepoints.")
|
|
class AtomicErrorsTests(TransactionTestCase):
|
|
|
|
available_apps = ['transactions']
|
|
|
|
def test_atomic_prevents_setting_autocommit(self):
|
|
autocommit = transaction.get_autocommit()
|
|
with transaction.atomic():
|
|
with self.assertRaises(transaction.TransactionManagementError):
|
|
transaction.set_autocommit(not autocommit)
|
|
# Make sure autocommit wasn't changed.
|
|
self.assertEqual(connection.autocommit, autocommit)
|
|
|
|
def test_atomic_prevents_calling_transaction_methods(self):
|
|
with transaction.atomic():
|
|
with self.assertRaises(transaction.TransactionManagementError):
|
|
transaction.commit()
|
|
with self.assertRaises(transaction.TransactionManagementError):
|
|
transaction.rollback()
|
|
|
|
def test_atomic_prevents_queries_in_broken_transaction(self):
|
|
r1 = Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
with transaction.atomic():
|
|
r2 = Reporter(first_name="Cuthbert", last_name="Calculus", id=r1.id)
|
|
with self.assertRaises(IntegrityError):
|
|
r2.save(force_insert=True)
|
|
# The transaction is marked as needing rollback.
|
|
with self.assertRaises(transaction.TransactionManagementError):
|
|
r2.save(force_update=True)
|
|
self.assertEqual(Reporter.objects.get(pk=r1.pk).last_name, "Haddock")
|
|
|
|
@skipIfDBFeature('atomic_transactions')
|
|
def test_atomic_allows_queries_after_fixing_transaction(self):
|
|
r1 = Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
with transaction.atomic():
|
|
r2 = Reporter(first_name="Cuthbert", last_name="Calculus", id=r1.id)
|
|
with self.assertRaises(IntegrityError):
|
|
r2.save(force_insert=True)
|
|
# Mark the transaction as no longer needing rollback.
|
|
transaction.set_rollback(False)
|
|
r2.save(force_update=True)
|
|
self.assertEqual(Reporter.objects.get(pk=r1.pk).last_name, "Calculus")
|
|
|
|
@skipUnlessDBFeature('test_db_allows_multiple_connections')
|
|
def test_atomic_prevents_queries_in_broken_transaction_after_client_close(self):
|
|
with transaction.atomic():
|
|
Reporter.objects.create(first_name="Archibald", last_name="Haddock")
|
|
connection.close()
|
|
# The connection is closed and the transaction is marked as
|
|
# needing rollback. This will raise an InterfaceError on databases
|
|
# that refuse to create cursors on closed connections (PostgreSQL)
|
|
# and a TransactionManagementError on other databases.
|
|
with self.assertRaises(Error):
|
|
Reporter.objects.create(first_name="Cuthbert", last_name="Calculus")
|
|
# The connection is usable again .
|
|
self.assertEqual(Reporter.objects.count(), 0)
|
|
|
|
|
|
@skipUnless(connection.vendor == 'mysql', "MySQL-specific behaviors")
|
|
class AtomicMySQLTests(TransactionTestCase):
|
|
|
|
available_apps = ['transactions']
|
|
|
|
@skipIf(threading is None, "Test requires threading")
|
|
def test_implicit_savepoint_rollback(self):
|
|
"""MySQL implicitly rolls back savepoints when it deadlocks (#22291)."""
|
|
|
|
other_thread_ready = threading.Event()
|
|
|
|
def other_thread():
|
|
try:
|
|
with transaction.atomic():
|
|
Reporter.objects.create(id=1, first_name="Tintin")
|
|
other_thread_ready.set()
|
|
# We cannot synchronize the two threads with an event here
|
|
# because the main thread locks. Sleep for a little while.
|
|
time.sleep(1)
|
|
# 2) ... and this line deadlocks. (see below for 1)
|
|
Reporter.objects.exclude(id=1).update(id=2)
|
|
finally:
|
|
# This is the thread-local connection, not the main connection.
|
|
connection.close()
|
|
|
|
other_thread = threading.Thread(target=other_thread)
|
|
other_thread.start()
|
|
other_thread_ready.wait()
|
|
|
|
with six.assertRaisesRegex(self, OperationalError, 'Deadlock found'):
|
|
# Double atomic to enter a transaction and create a savepoint.
|
|
with transaction.atomic():
|
|
with transaction.atomic():
|
|
# 1) This line locks... (see above for 2)
|
|
Reporter.objects.create(id=1, first_name="Tintin")
|
|
|
|
other_thread.join()
|
|
|
|
|
|
class AtomicMiscTests(TransactionTestCase):
|
|
|
|
available_apps = []
|
|
|
|
def test_wrap_callable_instance(self):
|
|
# Regression test for #20028
|
|
class Callable(object):
|
|
def __call__(self):
|
|
pass
|
|
# Must not raise an exception
|
|
transaction.atomic(Callable())
|
|
|
|
@skipUnlessDBFeature('can_release_savepoints')
|
|
def test_atomic_does_not_leak_savepoints_on_failure(self):
|
|
# Regression test for #23074
|
|
|
|
# Expect an error when rolling back a savepoint that doesn't exist.
|
|
# Done outside of the transaction block to ensure proper recovery.
|
|
with self.assertRaises(Error):
|
|
|
|
# Start a plain transaction.
|
|
with transaction.atomic():
|
|
|
|
# Swallow the intentional error raised in the sub-transaction.
|
|
with six.assertRaisesRegex(self, Exception, "Oops"):
|
|
|
|
# Start a sub-transaction with a savepoint.
|
|
with transaction.atomic():
|
|
sid = connection.savepoint_ids[-1]
|
|
raise Exception("Oops")
|
|
|
|
# This is expected to fail because the savepoint no longer exists.
|
|
connection.savepoint_rollback(sid)
|