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author | Aymeric Augustin <aymeric.augustin@m4x.org> | 2015-09-21 20:53:10 +0200 |
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committer | Aymeric Augustin <aymeric.augustin@m4x.org> | 2015-09-21 22:21:53 +0200 |
commit | 91e9f1c972842284a94097e252307ce6ed1007a1 (patch) | |
tree | 02d46fd57f4443dad4bd0c8ef3f6dec023ad18f4 | |
parent | 361254810eb8920978d69aa0fc074dbd40bfcc21 (diff) | |
download | django-91e9f1c972842284a94097e252307ce6ed1007a1.tar.gz |
Fixed #24921 -- set_autocommit(False) + ORM queries.
This commits lifts the restriction that the outermost atomic block must
be declared with savepoint=False. This restriction was overly cautious.
The logic that makes it safe not to create savepoints for inner blocks
also applies to the outermost block when autocommit is disabled and a
transaction is already active.
This makes it possible to use the ORM after set_autocommit(False).
Previously it didn't work because ORM write operations are protected
with atomic(savepoint=False).
-rw-r--r-- | django/db/transaction.py | 7 | ||||
-rw-r--r-- | docs/releases/1.8.5.txt | 4 | ||||
-rw-r--r-- | docs/topics/db/transactions.txt | 8 | ||||
-rw-r--r-- | tests/transactions/tests.py | 17 |
4 files changed, 25 insertions, 11 deletions
diff --git a/django/db/transaction.py b/django/db/transaction.py index 6c174bf2d3..e392c13b32 100644 --- a/django/db/transaction.py +++ b/django/db/transaction.py @@ -164,13 +164,6 @@ class Atomic(ContextDecorator): raise TransactionManagementError( "Your database backend doesn't behave properly when " "autocommit is off. Turn it on before using 'atomic'.") - # When entering an atomic block with autocommit turned off, - # Django should only use savepoints and shouldn't commit. - # This requires at least a savepoint for the outermost block. - if not self.savepoint: - raise TransactionManagementError( - "The outermost 'atomic' block cannot use " - "savepoint = False when autocommit is off.") # Pretend we're already in an atomic block to bypass the code # that disables autocommit to enter a transaction, and make a # note to deal with this case in __exit__. diff --git a/docs/releases/1.8.5.txt b/docs/releases/1.8.5.txt index 9cdd802057..d412c4b653 100644 --- a/docs/releases/1.8.5.txt +++ b/docs/releases/1.8.5.txt @@ -46,3 +46,7 @@ Bugfixes * Readded inline foreign keys to form instances when validating model formsets (:ticket:`25431`). + +* Allowed using ORM write methods after disabling autocommit with + :func:`set_autocommit(False) <django.db.transaction.set_autocommit>` + (:ticket:`24921`). diff --git a/docs/topics/db/transactions.txt b/docs/topics/db/transactions.txt index 5261f301a0..ad4e027ef5 100644 --- a/docs/topics/db/transactions.txt +++ b/docs/topics/db/transactions.txt @@ -200,8 +200,12 @@ Django provides a single API to control database transactions. the error handling described above. You may use ``atomic`` when autocommit is turned off. It will only use - savepoints, even for the outermost block, and it will raise an exception - if the outermost block is declared with ``savepoint=False``. + savepoints, even for the outermost block. + + .. versionchanged:: 1.8.5 + + Previously the outermost atomic block couldn't be declared with + ``savepoint=False`` when autocommit was turned off. .. admonition:: Performance considerations diff --git a/tests/transactions/tests.py b/tests/transactions/tests.py index dab406dbac..5d7851032f 100644 --- a/tests/transactions/tests.py +++ b/tests/transactions/tests.py @@ -398,16 +398,18 @@ class AtomicMiscTests(TransactionTestCase): available_apps = [] def test_wrap_callable_instance(self): - # Regression test for #20028 + """#20028 -- Atomic must support wrapping callable instances.""" + 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 + """#23074 -- Savepoints must be released after rollback.""" # Expect an error when rolling back a savepoint that doesn't exist. # Done outside of the transaction block to ensure proper recovery. @@ -426,3 +428,14 @@ class AtomicMiscTests(TransactionTestCase): # This is expected to fail because the savepoint no longer exists. connection.savepoint_rollback(sid) + + @skipIf(connection.features.autocommits_when_autocommit_is_off, + "This test requires a non-autocommit mode that doesn't autocommit.") + def test_orm_query_without_autocommit(self): + """#24921 -- ORM queries must be possible after set_autocommit(False).""" + transaction.set_autocommit(False) + try: + Reporter.objects.create(first_name="Tintin") + finally: + transaction.rollback() + transaction.set_autocommit(True) |