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Code Issues 32 Releases Wiki Activity

Fixed transaction handling for a number of operations on related objects.

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Thanks Anssi and Aymeric for the reviews. Refs #21174.
This commit is contained in:
Loic Bistuer
2014-03-30 01:57:28 +07:00
parent 975337e5c3
commit bc9be72bdc
5 changed files with 124 additions and 79 deletions
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14
docs/releases/1.8.txt
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@@ -168,7 +168,19 @@ Backwards incompatible changes in 1.8
deprecation timeline for a given feature, its removal may appear as a
backwards incompatible change.
...
* Some operations on related objects such as
:meth:`~django.db.models.fields.related.RelatedManager.add()` or
:ref:`direct assignment<direct-assignment>` ran multiple data modifying
queries without wrapping them in transactions. To reduce the risk of data
corruption, all data modifying methods that affect multiple related objects
(i.e. ``add()``, ``remove()``, ``clear()``, and
:ref:`direct assignment<direct-assignment>`) now perform their data modifying
queries from within a transaction, provided your database supports
transactions.
This has one backwards incompatible side effect, signal handlers triggered
from these methods are now executed within the method's transaction and
any exception in a signal handler will prevent the whole operation.
Miscellaneous
~~~~~~~~~~~~~