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Initial draft of 1.2 beta release notes.
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docs/releases/1.2-beta-1.txt
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.. _releases-1.2-beta-1:
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===============================
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Django 1.2 beta 1 release notes
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===============================
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February 5, 2010
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Welcome to Django 1.2 beta 1!
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This is the second in a series of preview/development releases leading
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up to the eventual release of Django 1.2, currently scheduled to take
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place in March 2010. This release is primarily targeted at developers
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who are interested in trying out new features and testing the Django
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codebase to help identify and resolve bugs prior to the final 1.2
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release.
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As such, this release is *not* intended for production use, and any
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such use is discouraged.
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This document covers changes since the Django 1.2 alpha release; the
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:ref:`1.2 alpha release notes <releases-1.2-alpha-1>` cover new and
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updated features in Django between 1.1 and 1.2 alpha.
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What's new in 1.2 beta
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======================
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This 1.2 beta release marks the final feature freeze for Django 1.2;
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while most feature development was completed for 1.2 alpha (which
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constituted a freeze on major features), a few other new features were
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added afterward and so are new as of 1.2 beta.
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Additionally, some existing APIs have been deprecated; under `our API
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stability policy <misc-api-stability>`, these APIs will continue to
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work for now, but will raise ``PendingDeprecationWarning`` in Django
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1.2 and ``DeprecationWarning`` in Django 1.3, before being removed in
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Django 1.4.
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Class-based test runners
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------------------------
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Django 1.2 changes the test runner tools to use a class-based
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approach. Old style function-based test runners will still work, but
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should be updated to use the new :ref:`class-based runners
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<topics-testing-test_runner>`.
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``Feed`` in ``django.contrib.syndication.feeds``
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------------------------------------------------
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The :class:`django.contrib.syndication.feeds.Feed` class is being
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replaced by the :class:`django.contrib.syndication.views.Feed` class.
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The old ``feeds.Feed`` class is deprecated, and will be removed in
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Django 1.4.
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The new class has an almost identical API, but allows instances to be
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used as views. For example, consider the use of the old framework in
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the following :ref:`URLconf <topics-http-urls>`::
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from django.conf.urls.defaults import *
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from myproject.feeds import LatestEntries, LatestEntriesByCategory
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feeds = {
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'latest': LatestEntries,
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'categories': LatestEntriesByCategory,
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}
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urlpatterns = patterns('',
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# ...
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(r'^feeds/(?P<url>.*)/$', 'django.contrib.syndication.views.feed',
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{'feed_dict': feeds}),
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# ...
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)
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Using the new Feed class, these feeds can be deployed directly as views::
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from django.conf.urls.defaults import *
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from myproject.feeds import LatestEntries, LatestEntriesByCategory
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urlpatterns = patterns('',
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# ...
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(r'^feeds/latest/$', LatestEntries()),
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(r'^feeds/categories/(?P<category_id>\d+)/$', LatestEntriesByCategory()),
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# ...
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)
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If you currently use the ``feed()`` view, the ``LatestEntries`` class
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would not need to be modified apart from subclassing the new
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:class:`~django.contrib.syndication.views.Feed` class.
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However, ``LatestEntriesByCategory`` uses the ``get_object()`` method
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with the ``bits`` argument to specify a specific category to show. In
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the new :class:`~django.contrib.syndication.views.Feed` class,
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``get_object()`` method takes a ``request`` and arguments from the
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URL, so it would look like this::
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from django.contrib.syndication.views import Feed
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from django.shortcuts import get_object_or_404
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from myproject.models import Category
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class LatestEntriesByCategory(Feed):
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def get_object(self, request, category_id):
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return get_object_or_404(Category, id=category_id)
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# ...
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Additionally, the ``get_feed()`` method on ``Feed`` classes now take
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different arguments, which may impact you if you use the ``Feed``
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classes directly. Instead of just taking an optional ``url`` argument,
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it now takes two arguments: the object returned by its own
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``get_object()`` method, and the current ``request`` object.
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To take into account ``Feed`` classes not being initialized for each
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request, the ``__init__()`` method now takes no arguments by default.
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Previously it would have taken the ``slug`` from the URL and the
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``request`` object.
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In accordance with `RSS best practices`_, RSS feeds will now include
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an ``atom:link`` element. You may need to update your tests to take
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this into account.
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For more information, see the full :ref:`syndication framework
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documentation <ref-contrib-syndication>`.
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.. _RSS best practices: http://www.rssboard.org/rss-profile
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Cookie encoding
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---------------
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Due to cookie-handling bugs in Internet Explorer, Safari, and possibly
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other browsers, our encoding of cookie values was changed so that the
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characters comma (',') and semi-colon (';') are treated as non-safe
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characters, and are therefore encoded as ``\054`` and ``\073``
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respectively. This could produce backwards incompatibilities if you
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are relying on the ability to set these characters directly in cookie
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values.
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Object-level permissions
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------------------------
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A foundation for specifying permissions at the per-object level has
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been added. The default authentication backends shipped with Django do
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not make use of this, but third-party authentication backends are free
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to do so. See the :ref:`authentication docs <topics-auth>` for more
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information.
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Permissions for anonymous users
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-------------------------------
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If you provide a custom authentication backend with the attribute
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``supports_anonymous_user`` set to ``True``, the ``AnonymousUser``
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class will check the backend for permissions, just as the normal
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``User`` does. This is intended to help centralize permission
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handling; apps can always delegate the question of whether something
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is allowed or not to the authorization/authentication system. See the
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:ref:`authentication docs <topics-auth>` for more details.
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The Django 1.2 roadmap
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======================
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Before the final Django 1.2 release, at least one additional
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preview/development releases will be made available. The current
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schedule consists of at least the following:
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* Week of **March 2, 2010**: First Django 1.2 release
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candidate. String freeze for translations.
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* Week of **March 9, 2010**: Django 1.2 final release.
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If necessary, additional beta or release-candidate packages will be
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issued prior to the final 1.2 release. Django 1.2 will be released
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approximately one week after the final release candidate.
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What you can do to help
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=======================
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In order to provide a high-quality 1.2 release, we need your
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help. Although this beta release is, again, *not* intended for
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production use, you can help the Django team by trying out the beta
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codebase in a safe test environment and reporting any bugs or issues
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you encounter. The Django ticket tracker is the central place to
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search for open issues:
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* http://code.djangoproject.com/timeline
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Please open new tickets if no existing ticket corresponds to a problem
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you're running into.
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Additionally, discussion of Django development, including progress
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toward the 1.2 release, takes place daily on the django-developers
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mailing list:
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* http://groups.google.com/group/django-developers
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... and in the ``#django-dev`` IRC channel on ``irc.freenode.net``. If
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... you're
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interested in helping out with Django's development, feel free to join the
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discussions there.
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Django's online documentation also includes pointers on how to
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contribute to Django:
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* :ref:`How to contribute to Django <internals-contributing>`
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Contributions on any level -- developing code, writing documentation
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or simply triaging tickets and helping to test proposed bugfixes --
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are always welcome and appreciated.
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Development sprints for Django 1.2 will also be taking place at PyCon
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US 2010, on the dedicated sprint days (February 22 through 25), and
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anyone who wants to help out is welcome to join in, either in person
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at PyCon or virtually in the IRC channel or on the mailing list.
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