mirror of https://github.com/django/django.git
Edited docs/releases/1.2.txt
git-svn-id: http://code.djangoproject.com/svn/django/trunk@12123 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty
parent
bf2283d47d
commit
50bfa46c39
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@ -4,12 +4,12 @@
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Django 1.2 release notes — UNDER DEVELOPMENT
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============================================
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This page documents release notes for the as-yet-unreleased Django 1.2. As such
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it is tentative and subject to change. It provides up-to-date information for
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This page documents release notes for the as-yet-unreleased Django 1.2. As such,
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it's tentative and subject to change. It provides up-to-date information for
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those who are following trunk.
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Django 1.2 includes a number of nifty `new features`_, lots of bug
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fixes, and an easy upgrade path from Django 1.1.
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fixes and an easy upgrade path from Django 1.1.
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.. _new features: `What's new in Django 1.2`_
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@ -21,22 +21,22 @@ Backwards-incompatible changes in 1.2
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CSRF Protection
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---------------
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There have been large changes to the way that CSRF protection works, detailed in
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:ref:`the CSRF documentaton <ref-contrib-csrf>`. The following are the major
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changes that developers must be aware of:
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We've made large changes to the way CSRF protection works, detailed in
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:ref:`the CSRF documentaton <ref-contrib-csrf>`. Here are the major changes you
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should be aware of:
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* ``CsrfResponseMiddleware`` and ``CsrfMiddleware`` have been deprecated, and
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* ``CsrfResponseMiddleware`` and ``CsrfMiddleware`` have been deprecated and
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will be removed completely in Django 1.4, in favor of a template tag that
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should be inserted into forms.
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* All contrib apps use a ``csrf_protect`` decorator to protect the view. This
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requires the use of the csrf_token template tag in the template, so if you
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* All contrib apps use a ``csrf_protect`` decorator to protect the view. This
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requires the use of the csrf_token template tag in the template. If you
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have used custom templates for contrib views, you MUST READ THE :ref:`UPGRADE
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INSTRUCTIONS <ref-csrf-upgrading-notes>` to fix those templates.
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* ``CsrfViewMiddleware`` is included in :setting:`MIDDLEWARE_CLASSES` by
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default. This turns on CSRF protection by default, so that views that accept
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POST requests need to be written to work with the middleware. Instructions
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default. This turns on CSRF protection by default, so views that accept
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POST requests need to be written to work with the middleware. Instructions
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on how to do this are found in the CSRF docs.
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* All of the CSRF has moved from contrib to core (with backwards compatible
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@ -46,32 +46,32 @@ changes that developers must be aware of:
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----------------------
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Due to new features in the :ttag:`if` template tag, it no longer accepts 'and',
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'or' and 'not' as valid **variable** names. Previously that worked in some
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cases even though these strings were normally treated as keywords. Now, the
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keyword status is always enforced, and template code like ``{% if not %}`` or
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``{% if and %}`` will throw a TemplateSyntaxError.
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'or' and 'not' as valid **variable** names. Previously, that worked in some
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cases even though these strings were normally treated as keywords. Now, the
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keyword status is always enforced, and template code such as ``{% if not %}`` or
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``{% if and %}`` will throw a ``TemplateSyntaxError``.
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``LazyObject``
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--------------
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``LazyObject`` is an undocumented utility class used for lazily wrapping other
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objects of unknown type. In Django 1.1 and earlier, it handled introspection in
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objects of unknown type. In Django 1.1 and earlier, it handled introspection in
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a non-standard way, depending on wrapped objects implementing a public method
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``get_all_members()``. Since this could easily lead to name clashes, it has been
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changed to use the standard method, involving ``__members__`` and ``__dir__()``.
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If you used ``LazyObject`` in your own code, and implemented the
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If you used ``LazyObject`` in your own code and implemented the
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``get_all_members()`` method for wrapped objects, you need to make the following
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changes:
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* If your class does not have special requirements for introspection (i.e. you
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* If your class does not have special requirements for introspection (i.e., you
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have not implemented ``__getattr__()`` or other methods that allow for
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attributes not discoverable by normal mechanisms), you can simply remove the
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``get_all_members()`` method. The default implementation on ``LazyObject``
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``get_all_members()`` method. The default implementation on ``LazyObject``
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will do the right thing.
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* If you have more complex requirements for introspection, first rename the
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``get_all_members()`` method to ``__dir__()``. This is the standard method,
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from Python 2.6 onwards, for supporting introspection. If you are require
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``get_all_members()`` method to ``__dir__()``. This is the standard method,
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from Python 2.6 onwards, for supporting introspection. If you require
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support for Python < 2.6, add the following code to the class::
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__members__ = property(lambda self: self.__dir__())
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@ -84,24 +84,21 @@ single database. Django 1.2 introduces support for multiple databases, and as
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a result, the way you define database settings has changed.
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Any existing Django settings file will continue to work as expected until
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Django 1.4. Old-style database settings will be automatically translated to
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the new-style format.
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Django 1.4. Until then, old-style database settings will be automatically
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translated to the new-style format.
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In the old-style (pre 1.2) format, there were a number of
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``DATABASE_`` settings at the top level of your settings file. For
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example::
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In the old-style (pre 1.2) format, you had a number of ``DATABASE_`` settings
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in your settings file. For example::
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DATABASE_NAME = 'test_db'
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DATABASE_ENGINE = 'postgresql_psycopg2'
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DATABASE_USER = 'myusername'
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DATABASE_PASSWORD = 's3krit'
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These settings are now contained inside a dictionary named
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:setting:`DATABASES`. Each item in the dictionary corresponds to a
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single database connection, with the name ``'default'`` describing the
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default database connection. The setting names have also been
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shortened to reflect the fact that they are stored in a dictionary.
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The sample settings given previously would now be stored using::
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These settings are now in a dictionary named :setting:`DATABASES`. Each item in
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the dictionary corresponds to a single database connection, with the name
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``'default'`` describing the default database connection. The setting names
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have also been shortened. The previous sample settings would now look like this::
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DATABASES = {
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'default': {
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@ -138,7 +135,7 @@ must now be specified by a fully qualified module name (i.e.,
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``django.db.backends.postgresql_psycopg2``, rather than just
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``postgresql_psycopg2``).
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``__dict__`` on Model instances
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``__dict__`` on model instances
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-------------------------------
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Historically, the ``__dict__`` attribute of a model instance has only contained
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@ -148,12 +145,12 @@ In order to support multiple database configurations, Django 1.2 has
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added a ``_state`` attribute to object instances. This attribute will
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appear in ``__dict__`` for a model instance. If your code relies on
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iterating over __dict__ to obtain a list of fields, you must now
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filter out ``_state`` attribute of out ``__dict__``.
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filter the ``_state`` attribute of out ``__dict__``.
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``get_db_prep_*()`` methods on Field
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------------------------------------
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``get_db_prep_*()`` methods on ``Field``
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----------------------------------------
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Prior to v1.2, a custom field had the option of defining several
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Prior to 1.2, a custom ``Field`` had the option of defining several
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functions to support conversion of Python values into
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database-compatible values. A custom field might look something like::
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@ -190,25 +187,25 @@ two extra methods have been introduced::
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def get_db_prep_lookup(self, lookup_type, value, connection, prepared=False):
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# ...
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These changes are required to support multiple databases -
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These changes are required to support multiple databases --
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``get_db_prep_*`` can no longer make any assumptions regarding the
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database for which it is preparing. The ``connection`` argument now
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provides the preparation methods with the specific connection for
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which the value is being prepared.
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The two new methods exist to differentiate general data preparation
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requirements, and requirements that are database-specific. The
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``prepared`` argument is used to indicate to the database preparation
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The two new methods exist to differentiate general data-preparation
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requirements from requirements that are database-specific. The
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``prepared`` argument is used to indicate to the database-preparation
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methods whether generic value preparation has been performed. If
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an unprepared (i.e., ``prepared=False``) value is provided to the
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``get_db_prep_*()`` calls, they should invoke the corresponding
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``get_prep_*()`` calls to perform generic data preparation.
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Conversion functions has been provided which will transparently
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We've provided conversion functions that will transparently
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convert functions adhering to the old prototype into functions
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compatible with the new prototype. However, this conversion function
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will be removed in Django 1.4, so you should upgrade your Field
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definitions to use the new prototype.
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compatible with the new prototype. However, these conversion functions
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will be removed in Django 1.4, so you should upgrade your ``Field``
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definitions to use the new prototype now, just to get it over with.
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If your ``get_db_prep_*()`` methods made no use of the database
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connection, you should be able to upgrade by renaming
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@ -227,7 +224,7 @@ template loader<template-loaders>`.
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All of the built-in Django template tags are safe to use with the cached
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loader, but if you're using custom template tags that come from third
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party packages, or that you wrote yourself, you should ensure that the
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party packages, or from your own code, you should ensure that the
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``Node`` implementation for each tag is thread-safe. For more
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information, see
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:ref:`template tag thread safety considerations<template_tag_thread_safety>`.
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|
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@ -236,10 +233,10 @@ Test runner exit status code
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----------------------------
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The exit status code of the test runners (``tests/runtests.py`` and ``python
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manage.py test``) no longer represents the number of failed tests, since a
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failure of 256 or more tests resulted in a wrong exit status code. The exit
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manage.py test``) no longer represents the number of failed tests, because a
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failure of 256 or more tests resulted in a wrong exit status code. The exit
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status code for the test runner is now 0 for success (no failing tests) and 1
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for any number of test failures. If needed, the number of test failures can be
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for any number of test failures. If needed, the number of test failures can be
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found at the end of the test runner's output.
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.. _deprecated-features-1.2:
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@ -247,14 +244,14 @@ found at the end of the test runner's output.
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Features deprecated in 1.2
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==========================
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CSRF response rewriting middleware
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CSRF response-rewriting middleware
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----------------------------------
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``CsrfResponseMiddleware``, the middleware that automatically inserted CSRF
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tokens into POST forms in outgoing pages, has been deprecated in favor of a
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template tag method (see above), and will be removed completely in Django
|
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1.4. ``CsrfMiddleware``, which includes the functionality of
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``CsrfResponseMiddleware`` and ``CsrfViewMiddleware`` has likewise been
|
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``CsrfResponseMiddleware`` and ``CsrfViewMiddleware``, has likewise been
|
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deprecated.
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|
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Also, the CSRF module has moved from contrib to core, and the old imports are
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|
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@ -264,7 +261,7 @@ deprecated, as described in the :ref:`upgrading notes <ref-csrf-upgrading-notes>
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------------------
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The ``SMTPConnection`` class has been deprecated in favor of a generic
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E-mail backend API. Old code that explicitly instantiated an instance
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e-mail backend API. Old code that explicitly instantiated an instance
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of an SMTPConnection::
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from django.core.mail import SMTPConnection
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@ -272,7 +269,7 @@ of an SMTPConnection::
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messages = get_notification_email()
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connection.send_messages(messages)
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should now call :meth:`~django.core.mail.get_connection()` to
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...should now call :meth:`~django.core.mail.get_connection()` to
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instantiate a generic e-mail connection::
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from django.core.mail import get_connection
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@ -303,11 +300,11 @@ The API for storing messages in the user ``Message`` model (via
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``user.message_set.create``) is now deprecated and will be removed in Django
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1.4 according to the standard :ref:`release process <internals-release-process>`.
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To upgrade your code, you need to replace any instances of::
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To upgrade your code, you need to replace any instances of this::
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user.message_set.create('a message')
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with the following::
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...with the following::
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from django.contrib import messages
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messages.add_message(request, messages.INFO, 'a message')
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|
|
@ -318,7 +315,7 @@ following::
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for message in user.get_and_delete_messages():
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...
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with::
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...with::
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from django.contrib import messages
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for message in messages.get_messages(request):
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|
|
@ -333,24 +330,23 @@ Date format helper functions
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``django.utils.translation.get_date_formats()`` and
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``django.utils.translation.get_partial_date_formats()`` have been deprecated
|
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in favor of the appropriate calls to ``django.utils.formats.get_format()``
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which is locale aware when :setting:`USE_L10N` is set to ``True``, and falls
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in favor of the appropriate calls to ``django.utils.formats.get_format()``,
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which is locale-aware when :setting:`USE_L10N` is set to ``True``, and falls
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back to default settings if set to ``False``.
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|
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To get the different date formats, instead of writing::
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To get the different date formats, instead of writing this::
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|
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from django.utils.translation import get_date_formats
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date_format, datetime_format, time_format = get_date_formats()
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|
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use::
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...use::
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|
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from django.utils import formats
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|
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date_format = formats.get_format('DATE_FORMAT')
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datetime_format = formats.get_format('DATETIME_FORMAT')
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time_format = formats.get_format('TIME_FORMAT')
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|
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or, when directly formatting a date value::
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Or, when directly formatting a date value::
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|
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from django.utils import formats
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value_formatted = formats.date_format(value, 'DATETIME_FORMAT')
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|
|
@ -372,13 +368,13 @@ CSRF support
|
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Django now has much improved protection against :ref:`Cross-Site
|
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Request Forgery (CSRF) attacks<ref-contrib-csrf>`. This type of attack
|
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occurs when a malicious Web site contains a link, a form button or
|
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some javascript that is intended to perform some action on your Web
|
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some JavaScript that is intended to perform some action on your Web
|
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site, using the credentials of a logged-in user who visits the
|
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malicious site in their browser. A related type of attack, 'login
|
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CSRF', where an attacking site tricks a user's browser into logging
|
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malicious site in their browser. A related type of attack, "login
|
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CSRF," where an attacking site tricks a user's browser into logging
|
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into a site with someone else's credentials, is also covered.
|
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|
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E-mail Backends
|
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E-mail backends
|
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---------------
|
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|
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You can now :ref:`configure the way that Django sends e-mail
|
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|
|
@ -389,14 +385,14 @@ sending mail, you can now construct an e-mail backend that will allow
|
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Django's standard :ref:`mail sending methods<topics-email>` to use
|
||||
those facilities.
|
||||
|
||||
This also makes it easier to debug mail sending - Django ships with
|
||||
This also makes it easier to debug mail sending. Django ships with
|
||||
backend implementations that allow you to send e-mail to a
|
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:ref:`file<topic-email-file-backend>`, to the
|
||||
:ref:`console<topic-email-console-backend>`, or to
|
||||
:ref:`memory<topic-email-memory-backend>` - you can even configure all
|
||||
:ref:`memory<topic-email-memory-backend>`. You can even configure all
|
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e-mail to be :ref:`thrown away<topic-email-dummy-backend>`.
|
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|
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Messages Framework
|
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Messages framework
|
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------------------
|
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|
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Django now includes a robust and configurable :ref:`messages framework
|
||||
|
|
@ -412,14 +408,14 @@ Support for multiple databases
|
|||
Django 1.2 adds the ability to use :ref:`more than one database
|
||||
<topics-db-multi-db>` in your Django project. Queries can be
|
||||
issued at a specific database with the `using()` method on
|
||||
querysets; individual objects can be saved to a specific database
|
||||
by providing a ``using`` argument when you save the instance.
|
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``QuerySet`` objects. Individual objects can be saved to a specific database
|
||||
by providing a ``using`` argument when you call ``save()``.
|
||||
|
||||
'Smart' if tag
|
||||
--------------
|
||||
|
||||
The :ttag:`if` tag has been upgraded to be much more powerful. First, support
|
||||
for comparison operators has been added. No longer will you have to type:
|
||||
The :ttag:`if` tag has been upgraded to be much more powerful. First, we've
|
||||
added support for comparison operators. No longer will you have to type:
|
||||
|
||||
.. code-block:: html+django
|
||||
|
||||
|
|
@ -427,7 +423,7 @@ for comparison operators has been added. No longer will you have to type:
|
|||
...
|
||||
{% endifnotequal %}
|
||||
|
||||
...as you can now do:
|
||||
You can now do this::
|
||||
|
||||
.. code-block:: html+django
|
||||
|
||||
|
|
@ -435,9 +431,12 @@ for comparison operators has been added. No longer will you have to type:
|
|||
...
|
||||
{% endif %}
|
||||
|
||||
There's really no reason to use ``{% ifequal %}`` or ``{% ifnotequal %}``
|
||||
anymore, unless you're the nostalgic type.
|
||||
|
||||
The operators supported are ``==``, ``!=``, ``<``, ``>``, ``<=``, ``>=`` and
|
||||
``in``, all of which work like the Python operators, in addition to ``and``,
|
||||
``or`` and ``not`` which were already supported.
|
||||
``or`` and ``not``, which were already supported.
|
||||
|
||||
Also, filters may now be used in the ``if`` expression. For example:
|
||||
|
||||
|
|
@ -452,10 +451,10 @@ Also, filters may now be used in the ``if`` expression. For example:
|
|||
Template caching
|
||||
----------------
|
||||
|
||||
In previous versions of Django, every time you rendered a template it
|
||||
In previous versions of Django, every time you rendered a template, it
|
||||
would be reloaded from disk. In Django 1.2, you can use a :ref:`cached
|
||||
template loader <template-loaders>` to load templates once, then use a
|
||||
cached the result for every subsequent render. This can lead to a
|
||||
template loader <template-loaders>` to load templates once, then
|
||||
cache the result for every subsequent render. This can lead to a
|
||||
significant performance improvement if your templates are broken into
|
||||
lots of smaller subtemplates (using the ``{% extends %}`` or ``{%
|
||||
include %}`` tags).
|
||||
|
|
@ -467,48 +466,49 @@ non-Django template languages<topic-template-alternate-language>`.
|
|||
Natural keys in fixtures
|
||||
------------------------
|
||||
|
||||
Fixtures can refer to remote objects using
|
||||
Fixtures can now refer to remote objects using
|
||||
:ref:`topics-serialization-natural-keys`. This lookup scheme is an
|
||||
alternative to the normal primary-key based object references in a
|
||||
fixture, improving readability, and resolving problems referring to
|
||||
fixture, improving readability and resolving problems referring to
|
||||
objects whose primary key value may not be predictable or known.
|
||||
|
||||
``BigIntegerField``
|
||||
-------------------
|
||||
|
||||
Models can now use a 64 bit :class:`~django.db.models.BigIntegerField` type.
|
||||
Models can now use a 64-bit :class:`~django.db.models.BigIntegerField` type.
|
||||
|
||||
Fast Failure for Tests
|
||||
Fast failure for tests
|
||||
----------------------
|
||||
|
||||
The :djadmin:`test` subcommand of ``django-admin.py``, and the ``runtests.py``
|
||||
script used to run Django's own test suite, support a new ``--failfast`` option.
|
||||
Both the :djadmin:`test` subcommand of ``django-admin.py`` and the ``runtests.py``
|
||||
script used to run Django's own test suite now support a ``--failfast`` option.
|
||||
When specified, this option causes the test runner to exit after encountering
|
||||
a failure instead of continuing with the test run. In addition, the handling
|
||||
a failure instead of continuing with the test run. In addition, the handling
|
||||
of ``Ctrl-C`` during a test run has been improved to trigger a graceful exit
|
||||
from the test run that reports details of the tests run before the interruption.
|
||||
from the test run that reports details of the tests that were run before the
|
||||
interruption.
|
||||
|
||||
Improved localization
|
||||
---------------------
|
||||
|
||||
Django's :ref:`internationalization framework <topics-i18n>` has been
|
||||
expanded by locale aware formatting and form processing. That means, if
|
||||
expanded with locale-aware formatting and form processing. That means, if
|
||||
enabled, dates and numbers on templates will be displayed using the format
|
||||
specified for the current locale. Django will also use localized formats
|
||||
when parsing data in forms.
|
||||
See :ref:`Format localization <format-localization>` for more details.
|
||||
when parsing data in forms. See
|
||||
:ref:`Format localization <format-localization>` for more details.
|
||||
|
||||
Added ``readonly_fields`` to ``ModelAdmin``
|
||||
-------------------------------------------
|
||||
``readonly_fields`` in ``ModelAdmin``
|
||||
-------------------------------------
|
||||
|
||||
:attr:`django.contrib.admin.ModelAdmin.readonly_fields` has been added to
|
||||
enable non-editable fields in add/change pages for models and inlines. Field
|
||||
and calculated values can be displayed along side editable fields.
|
||||
and calculated values can be displayed alongside editable fields.
|
||||
|
||||
Customizable syntax highlighting
|
||||
--------------------------------
|
||||
|
||||
You can now use the ``DJANGO_COLORS`` environment variable to modify
|
||||
You can now use a ``DJANGO_COLORS`` environment variable to modify
|
||||
or disable the colors used by ``django-admin.py`` to provide
|
||||
:ref:`syntax highlighting <syntax-coloring>`.
|
||||
|
||||
|
|
@ -516,9 +516,9 @@ Model validation
|
|||
----------------
|
||||
|
||||
Model instances now have support for :ref:`validating their own data
|
||||
<validating-objects`, and both model and form fields now accept
|
||||
<validating-objects>`, and both model and form fields now accept
|
||||
configurable lists of :ref:`validators <ref-validators>` specifying
|
||||
reusable, encapsulated validation behavior. Note, however, that
|
||||
validation must still be performed explicitly: simply invoking a model
|
||||
validation must still be performed explicitly. Simply invoking a model
|
||||
instance's ``save()`` method will not perform any validation of the
|
||||
instance's data.
|
||||
|
|
|
|||
Loading…
Reference in New Issue