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Add 1.1 alpha 1 release notes
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James Bennett
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.. _releases-1.1-alpha-1:
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================================
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Django 1.1 alpha 1 release notes
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================================
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February 23, 2009
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Welcome to Django 1.1 alpha 1!
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This is the first in a series of preview/development releases leading
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up to the eventual release of Django 1.1, currently scheduled to take
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place in April 2009. 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 1.1
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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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What's new in Django 1.1 alpha 1
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================================
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Two major enhancements have been added to Django's object-relational
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mapper (ORM):
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Aggregate support
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It's now possible to run various SQL aggregate queries from within
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Django's ORM, and to either return the results of an aggregate
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query directly or annotate the objects in a ``QuerySet`` with the
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results of an aggregate query. This is accomplished by the new
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``QuerySet`` methods ``aggregate()`` and ``annotate()``, and is
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covered in detail in `the ORM aggregation documentation <topics-db-aggregation>`_.
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Query expressions
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A new type of object -- ``django.db.models.F`` -- has been added.
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``F`` instances refer to a particular field on a model (and can
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traverse relationships to refer to fields on related models as
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well). This allows a variety of query types to be formulated which
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were not previously possible; for full details, including
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examples, consult the `documentation for F expressions <query-expressions>`_.
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Django's test suite and integrated `testing framework <topics-testing>`_
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have also been improved, via the introduction of transaction-based
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tests: when using ``django.test.TestCase``, your tests will now (when
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supported by the underlying database) be run in a transaction which is
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rolled back when finished, instead of by flushing and re-populating
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the database. This results in an immense speedup for most types of
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unit tests. See the documentation for :class:`~django.test.TestCase`
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and :class:`~django.test.TransactionTestCase` for a full description,
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and some important notes on database support.
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Other new features and changes introduced since Django 1.0 include:
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* The `CSRF protection middleware <ref-contrib-csrf>`_ has been split
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into two classes -- ``CsrfViewMiddleware`` checks incoming requests,
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and ``CsrfResponseMiddleware`` processes outgoing responses. The
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combined ``CsrfMiddleware`` class (which does both) remains for
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backwards-compatibility, but using the split classes is now
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recommended in order to allow fine-grained control of when and where
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the CSRF processing takes place.
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* :func:`~django.core.urlresolvers.reverse` and code which uses it
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(e.g., the ``{% url %}`` template tag) now works with URLs in
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Django's administrative site, provided that the admin URLs are set
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up via ``include(admin.site.urls)`` (sending admin requests to the
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``admin.site.root`` view still works, but URLs in the admin will not
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be "reversible" when configured this way).
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* The ``include()`` function in Django URLConf modules can now accept
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sequences of URL patterns (generated by ``patterns()``) in addition
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to module names.
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* Instances of Django forms (see `the forms overview <topics-forms-index>`_
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now have two additional methods, ``hidden_fields()`` and
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``visible_fields()``, which return the list of hidden -- i.e.,
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``<input type="hidden">`` -- and visible fields on the form,
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respectively.
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* The ``redirect_to`` generic view (see
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`the generic views documentation <ref-generic-views>`_) now accepts
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an additional keyword argument ``permanent``. If ``permanent`` is
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``True``, the view will emit an HTTP permanent redirect (status code
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301). If ``False``, the view will emit an HTTP temporary redirect
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(status code 302).
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* A new database lookup type -- ``week_day`` -- has been added for
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``DateField`` and ``DateTimeField``. This type of lookup accepts a
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number between 1 (Sunday) and 7 (Saturday), and returns objects
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where the field value matches that day of the week. See
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`the full list of lookup types <field-lookups>`_ for details.
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* The ``{% for %}`` tag in Django's template language now accepts an
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optional ``{% empty %}`` clause, to be displayed when ``{% for %}``
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is asked to loop over an empty sequence. See
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`the list of built-in template tags <ref-templates-builtins>`_
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for examples of this.
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The Django 1.1 roadmap
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======================
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Before Django 1.1 goes final, several other preview/development
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releases will be made available. The current schedule consists of at
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least the following:
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* *March 20, 2009:* Django 1.1 beta 1, at which point Django 1.1 will
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be in "feature freeze": no new features will be implemented for 1.1
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past that point, and all new feature work will be deferred to
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Django 1.2.
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* *April 2, 2009:* Django 1.1 release candidate. At this point all
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strings marked for translation must freeze to allow translations to
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be submitted in advance of the final release.
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* *April 13, 2009:* Django 1.1 is released.
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If necessary, additional alpha, beta or release candidate packages
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will be issued prior to the final 1.1 release.
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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 1.1 release, we need your
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help. Although this alpha release is, again, *not* intended for
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production use, you can help the Django team by trying out the alpha
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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 1.1 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 interested in helping out with Django's development, feel free
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to join the 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:`contributing to Django <internals-contributing>`
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Contributions on any level -- developing code, writing
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documentation or simply triaging tickets and helping to test proposed
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bugfixes -- are always welcome and appreciated.
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Development sprints for Django 1.1 will also be taking place at PyCon
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US 2009, on the dedicated sprint days (March 30 through April 2), 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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