mirror of https://github.com/django/django.git
Added structure in the 1.6 release notes.
The backwards-incompatible changes section wasn't structured in sections like it is in release notes for previous versions.
This commit is contained in:
Aymeric Augustin
parent
9d4a5b00f1
commit
0555ef7c23
|
|
@ -165,69 +165,110 @@ Backwards incompatible changes in 1.6
|
|||
deprecation timeline for a given feature, its removal may appear as a
|
||||
backwards incompatible change.
|
||||
|
||||
* Database-level autocommit is enabled by default in Django 1.6. While this
|
||||
doesn't change the general spirit of Django's transaction management, there
|
||||
are a few known backwards-incompatibities, described in the :ref:`transaction
|
||||
management docs <transactions-upgrading-from-1.5>`. You should review your code
|
||||
to determine if you're affected.
|
||||
New transaction management model
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
* In previous versions, database-level autocommit was only an option for
|
||||
PostgreSQL, and it was disabled by default. This option is now
|
||||
:ref:`ignored <postgresql-autocommit-mode>`.
|
||||
Database-level autocommit is enabled by default in Django 1.6. While this
|
||||
doesn't change the general spirit of Django's transaction management, there
|
||||
are a few known backwards-incompatibities, described in the :ref:`transaction
|
||||
management docs <transactions-upgrading-from-1.5>`. You should review your
|
||||
code to determine if you're affected.
|
||||
|
||||
* The ``django.db.models.query.EmptyQuerySet`` can't be instantiated any more -
|
||||
it is only usable as a marker class for checking if
|
||||
:meth:`~django.db.models.query.QuerySet.none` has been called:
|
||||
``isinstance(qs.none(), EmptyQuerySet)``
|
||||
In previous versions, database-level autocommit was only an option for
|
||||
PostgreSQL, and it was disabled by default. This option is now :ref:`ignored
|
||||
<postgresql-autocommit-mode>` and can be removed.
|
||||
|
||||
* :meth:`QuerySet.dates() <django.db.models.query.QuerySet.dates>` raises an
|
||||
error if it's used on :class:`~django.db.models.DateTimeField` when time
|
||||
zone support is active. Use :meth:`QuerySet.datetimes()
|
||||
<django.db.models.query.QuerySet.datetimes>` instead.
|
||||
Addition of ``QuerySet.datetimes()``
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
* :meth:`QuerySet.dates() <django.db.models.query.QuerySet.dates>` returns a
|
||||
list of :class:`~datetime.date`. It used to return a list of
|
||||
:class:`~datetime.datetime`.
|
||||
When the :doc:`time zone support </topics/i18n/timezones>` added in Django 1.4
|
||||
was active, :meth:`QuerySet.dates() <django.db.models.query.QuerySet.dates>`
|
||||
lookups returned unexpected results, because the aggregation was performed in
|
||||
UTC. To fix this, Django 1.6 introduces a new API, :meth:`QuerySet.datetimes()
|
||||
<django.db.models.query.QuerySet.datetimes>`. This requires a few changes in
|
||||
your code.
|
||||
|
||||
* The :attr:`~django.contrib.admin.ModelAdmin.date_hierarchy` feature of the
|
||||
admin on a :class:`~django.db.models.DateTimeField` requires time zone
|
||||
definitions in the database when :setting:`USE_TZ` is ``True``.
|
||||
:ref:`Learn more <database-time-zone-definitions>`.
|
||||
``QuerySet.dates()`` returns ``date`` objects
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
* Accessing ``date_list`` in the context of a date-based generic view requires
|
||||
time zone definitions in the database when the view is based on a
|
||||
:class:`~django.db.models.DateTimeField` and :setting:`USE_TZ` is ``True``.
|
||||
:ref:`Learn more <database-time-zone-definitions>`.
|
||||
:meth:`QuerySet.dates() <django.db.models.query.QuerySet.dates>` now returns a
|
||||
list of :class:`~datetime.date`. It used to return a list of
|
||||
:class:`~datetime.datetime`.
|
||||
|
||||
* Model fields named ``hour``, ``minute`` or ``second`` may clash with the new
|
||||
lookups. Append an explicit :lookup:`exact` lookup if this is an issue.
|
||||
:meth:`QuerySet.datetimes() <django.db.models.query.QuerySet.datetimes>`
|
||||
returns a list of :class:`~datetime.datetime`.
|
||||
|
||||
* When Django establishes a connection to the database, it sets up appropriate
|
||||
parameters, depending on the backend being used. Since `persistent database
|
||||
connections <persistent-database-connections>`_ are enabled by default in
|
||||
Django 1.6, this setup isn't repeated at every request any more. If you
|
||||
modifiy parameters such as the connection's isolation level or time zone,
|
||||
you should either restore Django's defaults at the end of each request, or
|
||||
force an appropriate value at the beginning of each request.
|
||||
``QuerySet.dates()`` no longer usable on ``DateTimeField``
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
* If your CSS/Javascript code used to access HTML input widgets by type, you
|
||||
should review it as ``type='text'`` widgets might be now output as
|
||||
``type='email'``, ``type='url'`` or ``type='number'`` depending on their
|
||||
corresponding field type.
|
||||
:meth:`QuerySet.dates() <django.db.models.query.QuerySet.dates>` raises an
|
||||
error if it's used on :class:`~django.db.models.DateTimeField` when time
|
||||
zone support is active. Use :meth:`QuerySet.datetimes()
|
||||
<django.db.models.query.QuerySet.datetimes>` instead.
|
||||
|
||||
* Extraction of translatable literals from templates with the
|
||||
:djadmin:`makemessages` command now correctly detects i18n constructs when
|
||||
they are located after a ``{#`` / ``#}``-type comment on the same line. E.g.:
|
||||
``date_hierarchy`` requires time zone definitions
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
.. code-block:: html+django
|
||||
The :attr:`~django.contrib.admin.ModelAdmin.date_hierarchy` feature of the
|
||||
admin now relies on :meth:`QuerySet.datetimes()
|
||||
<django.db.models.query.QuerySet.datetimes>` when it's used on a
|
||||
:class:`~django.db.models.DateTimeField`.
|
||||
|
||||
This requires time zone definitions in the database when :setting:`USE_TZ` is
|
||||
``True``. :ref:`Learn more <database-time-zone-definitions>`.
|
||||
|
||||
``date_list`` in generic views requires time zone definitions
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
For the same reason, accessing ``date_list`` in the context of a date-based
|
||||
generic view requires time zone definitions in the database when the view is
|
||||
based on a :class:`~django.db.models.DateTimeField` and :setting:`USE_TZ` is
|
||||
``True``. :ref:`Learn more <database-time-zone-definitions>`.
|
||||
|
||||
New lookups may clash with model fields
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Django 1.6 introduces ``hour``, ``minute``, and ``second`` lookups on
|
||||
:class:`~django.db.models.DateTimeField`. If you had model fields called
|
||||
``hour``, ``minute``, or ``second``, the new lookups will clash with you field
|
||||
names. Append an explicit :lookup:`exact` lookup if this is an issue.
|
||||
|
||||
Persistent database connections
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Connection setup not repeated for each request
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
When Django establishes a connection to the database, it sets up appropriate
|
||||
parameters, depending on the backend being used. Since `persistent database
|
||||
connections <persistent-database-connections>`_ are enabled by default in
|
||||
Django 1.6, this setup isn't repeated at every request any more. If you
|
||||
modifiy parameters such as the connection's isolation level or time zone, you
|
||||
should either restore Django's defaults at the end of each request, force an
|
||||
appropriate value at the beginning of each request, or disable persistent
|
||||
connections.
|
||||
|
||||
Translations and comments in templates
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Extraction of translations after comments
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
Extraction of translatable literals from templates with the
|
||||
:djadmin:`makemessages` command now correctly detects i18n constructs when
|
||||
they are located after a ``{#`` / ``#}``-type comment on the same line. E.g.:
|
||||
|
||||
.. code-block:: html+django
|
||||
|
||||
{# A comment #}{% trans "This literal was incorrectly ignored. Not anymore" %}
|
||||
|
||||
* (Related to the above item.) Validation of the placement of
|
||||
:ref:`translator-comments-in-templates` specified using ``{#`` / ``#}`` is now
|
||||
stricter. All translator comments not located at the end of their respective
|
||||
lines in a template are ignored and a warning is generated by
|
||||
:djadmin:`makemessages` when it finds them. E.g.:
|
||||
Location of translator comments
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
Validation of the placement of :ref:`translator-comments-in-templates`
|
||||
specified using ``{#`` / ``#}`` is now stricter. All translator comments not
|
||||
located at the end of their respective lines in a template are ignored and a
|
||||
warning is generated by :djadmin:`makemessages` when it finds them. E.g.:
|
||||
|
||||
.. code-block:: html+django
|
||||
|
||||
|
|
@ -235,28 +276,45 @@ Backwards incompatible changes in 1.6
|
|||
{{ title }}{# Translators: Extracted and associated with 'Welcome' below #}
|
||||
<h1>{% trans "Welcome" %}</h1>
|
||||
|
||||
* The :doc:`comments </ref/contrib/comments/index>` app now uses a ``GenericIPAddressField``
|
||||
for storing commenters' IP addresses, to support comments submitted from IPv6 addresses.
|
||||
Until now, it stored them in an ``IPAddressField``, which is only meant to support IPv4.
|
||||
When saving a comment made from an IPv6 address, the address would be silently truncated
|
||||
on MySQL databases, and raise an exception on Oracle.
|
||||
You will need to change the column type in your database to benefit from this change.
|
||||
Storage of IP addresses in the comments app
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
For MySQL, execute this query on your project's database:
|
||||
The :doc:`comments </ref/contrib/comments/index>` app now uses a
|
||||
``GenericIPAddressField`` for storing commenters' IP addresses, to support
|
||||
comments submitted from IPv6 addresses. Until now, it stored them in an
|
||||
``IPAddressField``, which is only meant to support IPv4. When saving a comment
|
||||
made from an IPv6 address, the address would be silently truncated on MySQL
|
||||
databases, and raise an exception on Oracle. You will need to change the
|
||||
column type in your database to benefit from this change.
|
||||
|
||||
.. code-block:: sql
|
||||
For MySQL, execute this query on your project's database:
|
||||
|
||||
.. code-block:: sql
|
||||
|
||||
ALTER TABLE django_comments MODIFY ip_address VARCHAR(39);
|
||||
|
||||
For Oracle, execute this query:
|
||||
For Oracle, execute this query:
|
||||
|
||||
.. code-block:: sql
|
||||
.. code-block:: sql
|
||||
|
||||
ALTER TABLE DJANGO_COMMENTS MODIFY (ip_address VARCHAR2(39));
|
||||
|
||||
If you do not apply this change, the behaviour is unchanged: on MySQL, IPv6 addresses
|
||||
are silently truncated; on Oracle, an exception is generated. No database
|
||||
change is needed for SQLite or PostgreSQL databases.
|
||||
If you do not apply this change, the behaviour is unchanged: on MySQL, IPv6
|
||||
addresses are silently truncated; on Oracle, an exception is generated. No
|
||||
database change is needed for SQLite or PostgreSQL databases.
|
||||
|
||||
Miscellaneous
|
||||
~~~~~~~~~~~~~
|
||||
|
||||
* The ``django.db.models.query.EmptyQuerySet`` can't be instantiated any more -
|
||||
it is only usable as a marker class for checking if
|
||||
:meth:`~django.db.models.query.QuerySet.none` has been called:
|
||||
``isinstance(qs.none(), EmptyQuerySet)``
|
||||
|
||||
* If your CSS/Javascript code used to access HTML input widgets by type, you
|
||||
should review it as ``type='text'`` widgets might be now output as
|
||||
``type='email'``, ``type='url'`` or ``type='number'`` depending on their
|
||||
corresponding field type.
|
||||
|
||||
Features deprecated in 1.6
|
||||
==========================
|
||||
|
|
|
|||
Loading…
Reference in New Issue