mirror of
https://github.com/django/django.git
synced 2024-12-26 11:06:07 +00:00
8151c0431e
git-svn-id: http://code.djangoproject.com/svn/django/trunk@15323 bcc190cf-cafb-0310-a4f2-bffc1f526a37
64 lines
2.8 KiB
Plaintext
64 lines
2.8 KiB
Plaintext
==========================
|
|
Django 1.2.5 release notes
|
|
==========================
|
|
|
|
Welcome to Django 1.2.5!
|
|
|
|
This is the fifth "bugfix" release in the Django 1.2 series,
|
|
improving the stability and performance of the Django 1.2 codebase.
|
|
|
|
With two exceptions, Django 1.2.5 maintains backwards compatibility
|
|
with Django 1.2.4, but contain a number of fixes and other
|
|
improvements. Django 1.2.5 is a recommended upgrade for any
|
|
development or deployment currently using or targeting Django 1.2.
|
|
|
|
For full details on the new features, backwards incompatibilities, and
|
|
deprecated features in the 1.2 branch, see the :doc:`/releases/1.2`.
|
|
|
|
Backwards incompatible changes
|
|
==============================
|
|
|
|
FileField no longer deletes files
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
In earlier Django versions, when a model instance containing a
|
|
:class:`~django.db.models.FileField` was deleted,
|
|
:class:`~django.db.models.FileField` took it upon itself to also delete the
|
|
file from the backend storage. This opened the door to several potentially
|
|
serious data-loss scenarios, including rolled-back transactions and fields on
|
|
different models referencing the same file. In Django 1.2.5,
|
|
:class:`~django.db.models.FileField` will never delete files from the backend
|
|
storage. If you need cleanup of orphaned files, you'll need to handle it
|
|
yourself (for instance, with a custom management command that can be run
|
|
manually or scheduled to run periodically via e.g. cron).
|
|
|
|
Use of custom SQL to load initial data in tests
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Django provides a custom SQL hooks as a way to inject hand-crafted SQL
|
|
into the database synchronization process. One of the possible uses
|
|
for this custom SQL is to insert data into your database. If your
|
|
custom SQL contains ``INSERT`` statements, those insertions will be
|
|
performed every time your database is synchronized. This includes the
|
|
synchronization of any test databases that are created when you run a
|
|
test suite.
|
|
|
|
However, in the process of testing the Django 1.3, it was discovered
|
|
that this feature has never completely worked as advertised. When
|
|
using database backends that don't support transactions, or when using
|
|
a TransactionTestCase, data that has been inserted using custom SQL
|
|
will not be visible during the testing process.
|
|
|
|
Unfortunately, there was no way to rectify this problem without
|
|
introducing a backwards incompatibility. Rather than leave
|
|
SQL-inserted initial data in an uncertain state, Django now enforces
|
|
the policy that data inserted by custom SQL will *not* be visible
|
|
during testing.
|
|
|
|
This change only affects the testing process. You can still use custom
|
|
SQL to load data into your production database as part of the syncdb
|
|
process. If you require data to exist during test conditions, you
|
|
should either insert it using :ref:`test fixtures
|
|
<topics-testing-fixtures>`, or using the ``setUp()`` method of your
|
|
test case.
|