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<div class="yui-g" id="internals-deprecation">
<div class="section" id="s-django-deprecation-timeline">
<span id="django-deprecation-timeline"></span><h1>Django Deprecation Timeline<a class="headerlink" href="#django-deprecation-timeline" title="Permalink to this headline">¶</a></h1>
<p>This document outlines when various pieces of Django will be removed or altered
in a backward incompatible way, following their deprecation, as per the
<a class="reference internal" href="release-process.html#internal-release-deprecation-policy"><em>deprecation policy</em></a>. More details
about each item can often be found in the release notes of two versions prior.</p>
<div class="section" id="s-id1">
<span id="id1"></span><h2>1.4<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h2>
<p>See the <a class="reference internal" href="../releases/1.2.html"><em>Django 1.2 release notes</em></a> for more details on
these changes.</p>
<ul class="simple">
<li><tt class="docutils literal"><span class="pre">CsrfResponseMiddleware</span></tt> and <tt class="docutils literal"><span class="pre">CsrfMiddleware</span></tt> will be removed. Use
the {% csrf_token %} template tag inside forms to enable CSRF
protection. <tt class="docutils literal"><span class="pre">CsrfViewMiddleware</span></tt> remains and is enabled by default.</li>
<li>The old imports for CSRF functionality (<tt class="docutils literal"><span class="pre">django.contrib.csrf.*</span></tt>),
which moved to core in 1.2, will be removed.</li>
<li>The <tt class="xref py py-mod docutils literal"><span class="pre">django.contrib.gis.db.backend</span></tt> module will be removed in favor
of the specific backends.</li>
<li><tt class="docutils literal"><span class="pre">SMTPConnection</span></tt> will be removed in favor of a generic E-mail backend API.</li>
<li>The many to many SQL generation functions on the database backends
will be removed.</li>
<li>The ability to use the <tt class="docutils literal"><span class="pre">DATABASE_*</span></tt> family of top-level settings to
define database connections will be removed.</li>
<li>The ability to use shorthand notation to specify a database backend
(i.e., <tt class="docutils literal"><span class="pre">sqlite3</span></tt> instead of <tt class="docutils literal"><span class="pre">django.db.backends.sqlite3</span></tt>) will be
removed.</li>
<li>The <tt class="docutils literal"><span class="pre">get_db_prep_save</span></tt>, <tt class="docutils literal"><span class="pre">get_db_prep_value</span></tt> and
<tt class="docutils literal"><span class="pre">get_db_prep_lookup</span></tt> methods will have to support multiple databases.</li>
<li>The <tt class="docutils literal"><span class="pre">Message</span></tt> model (in <tt class="docutils literal"><span class="pre">django.contrib.auth</span></tt>), its related
manager in the <tt class="docutils literal"><span class="pre">User</span></tt> model (<tt class="docutils literal"><span class="pre">user.message_set</span></tt>), and the
associated methods (<tt class="docutils literal"><span class="pre">user.message_set.create()</span></tt> and
<tt class="docutils literal"><span class="pre">user.get_and_delete_messages()</span></tt>), will be removed. The
<a class="reference internal" href="../ref/contrib/messages.html"><em>messages framework</em></a> should be used
instead. The related <tt class="docutils literal"><span class="pre">messages</span></tt> variable returned by the
auth context processor will also be removed. Note that this
means that the admin application will depend on the messages
context processor.</li>
<li>Authentication backends will need to support the <tt class="docutils literal"><span class="pre">obj</span></tt> parameter for
permission checking. The <tt class="docutils literal"><span class="pre">supports_object_permissions</span></tt> attribute
will no longer be checked and can be removed from custom backends.</li>
<li>Authentication backends will need to support the <tt class="docutils literal"><span class="pre">AnonymousUser</span></tt> class
being passed to all methods dealing with permissions. The
<tt class="docutils literal"><span class="pre">supports_anonymous_user</span></tt> variable will no longer be checked and can be
removed from custom backends.</li>
<li>The ability to specify a callable template loader rather than a
<tt class="docutils literal"><span class="pre">Loader</span></tt> class will be removed, as will the <tt class="docutils literal"><span class="pre">load_template_source</span></tt>
functions that are included with the built in template loaders for
backwards compatibility.</li>
<li><tt class="docutils literal"><span class="pre">django.utils.translation.get_date_formats()</span></tt> and
<tt class="docutils literal"><span class="pre">django.utils.translation.get_partial_date_formats()</span></tt>. These functions
will be removed; use the locale-aware
<tt class="docutils literal"><span class="pre">django.utils.formats.get_format()</span></tt> to get the appropriate formats.</li>
<li>In <tt class="docutils literal"><span class="pre">django.forms.fields</span></tt>, the constants: <tt class="docutils literal"><span class="pre">DEFAULT_DATE_INPUT_FORMATS</span></tt>,
<tt class="docutils literal"><span class="pre">DEFAULT_TIME_INPUT_FORMATS</span></tt> and
<tt class="docutils literal"><span class="pre">DEFAULT_DATETIME_INPUT_FORMATS</span></tt> will be removed. Use
<tt class="docutils literal"><span class="pre">django.utils.formats.get_format()</span></tt> to get the appropriate
formats.</li>
<li>The ability to use a function-based test runners will be removed,
along with the <tt class="docutils literal"><span class="pre">django.test.simple.run_tests()</span></tt> test runner.</li>
<li>The <tt class="docutils literal"><span class="pre">views.feed()</span></tt> view and <tt class="docutils literal"><span class="pre">feeds.Feed</span></tt> class in
<tt class="docutils literal"><span class="pre">django.contrib.syndication</span></tt> will be removed. The class-based view
<tt class="docutils literal"><span class="pre">views.Feed</span></tt> should be used instead.</li>
<li><tt class="docutils literal"><span class="pre">django.core.context_processors.auth</span></tt>. This release will
remove the old method in favor of the new method in
<tt class="docutils literal"><span class="pre">django.contrib.auth.context_processors.auth</span></tt>.</li>
<li>The <tt class="docutils literal"><span class="pre">postgresql</span></tt> database backend will be removed, use the
<tt class="docutils literal"><span class="pre">postgresql_psycopg2</span></tt> backend instead.</li>
<li>The <tt class="docutils literal"><span class="pre">no</span></tt> language code will be removed and has been replaced by the
<tt class="docutils literal"><span class="pre">nb</span></tt> language code.</li>
<li>Authentication backends will need to define the boolean attribute
<tt class="docutils literal"><span class="pre">supports_inactive_user</span></tt> until version 1.5 when it will be assumed that
all backends will handle inactive users.</li>
<li><tt class="docutils literal"><span class="pre">django.db.models.fields.XMLField</span></tt> will be removed. This was
deprecated as part of the 1.3 release. An accelerated deprecation
schedule has been used because the field hasn’t performed any role
beyond that of a simple <tt class="docutils literal"><span class="pre">TextField</span></tt> since the removal of oldforms.
All uses of <tt class="docutils literal"><span class="pre">XMLField</span></tt> can be replaced with <tt class="docutils literal"><span class="pre">TextField</span></tt>.</li>
<li>The undocumented <tt class="docutils literal"><span class="pre">mixin</span></tt> parameter to the <tt class="docutils literal"><span class="pre">open()</span></tt> method of
<tt class="docutils literal"><span class="pre">django.core.files.storage.Storage</span></tt> (and subclasses) will be removed.</li>
</ul>
</div>
<div class="section" id="s-id2">
<span id="id2"></span><h2>1.5<a class="headerlink" href="#id2" title="Permalink to this headline">¶</a></h2>
<p>See the <a class="reference internal" href="../releases/1.3.html"><em>Django 1.3 release notes</em></a> for more details on
these changes.</p>
<ul class="simple">
<li>Starting Django without a <a class="reference internal" href="../ref/settings.html#std:setting-SECRET_KEY"><tt class="xref std std-setting docutils literal"><span class="pre">SECRET_KEY</span></tt></a> will result in an exception
rather than a <cite>DeprecationWarning</cite>. (This is accelerated from the usual
deprecation path; see the <a class="reference internal" href="../releases/1.4.html"><em>Django 1.4 release notes</em></a>.)</li>
<li>The <tt class="docutils literal"><span class="pre">mod_python</span></tt> request handler will be removed. The <tt class="docutils literal"><span class="pre">mod_wsgi</span></tt>
handler should be used instead.</li>
<li>The <tt class="docutils literal"><span class="pre">template</span></tt> attribute on <a class="reference internal" href="../topics/testing.html#django.test.client.Response" title="django.test.client.Response"><tt class="xref py py-class docutils literal"><span class="pre">Response</span></tt></a>
objects returned by the <a class="reference internal" href="../topics/testing.html#test-client"><em>test client</em></a> will be removed.
The <a class="reference internal" href="../topics/testing.html#django.test.client.Response.templates" title="django.test.client.Response.templates"><tt class="xref py py-attr docutils literal"><span class="pre">templates</span></tt></a> attribute should be
used instead.</li>
<li>The <tt class="xref py py-class docutils literal"><span class="pre">DjangoTestRunner</span></tt> will be removed.
Instead use a unittest-native class. The features of the
<tt class="xref py py-class docutils literal"><span class="pre">django.test.simple.DjangoTestRunner</span></tt> (including fail-fast and
Ctrl-C test termination) can currently be provided by the unittest-native
<tt class="xref py py-class docutils literal"><span class="pre">TextTestRunner</span></tt>.</li>
<li>The undocumented function
<tt class="xref py py-func docutils literal"><span class="pre">django.contrib.formtools.utils.security_hash()</span></tt> will be removed,
instead use <tt class="xref py py-func docutils literal"><span class="pre">django.contrib.formtools.utils.form_hmac()</span></tt></li>
<li>The function-based generic view modules will be removed in favor of their
class-based equivalents, outlined <a class="reference internal" href="../topics/generic-views-migration.html"><em>here</em></a>:</li>
<li>The <tt class="xref py py-class docutils literal"><span class="pre">AdminMediaHandler</span></tt> will be
removed. In its place use
<tt class="xref py py-class docutils literal"><span class="pre">StaticFilesHandler</span></tt>.</li>
<li>The <a class="reference internal" href="../ref/templates/builtins.html#std:templatetag-url"><tt class="xref std std-ttag docutils literal"><span class="pre">url</span></tt></a> and <a class="reference internal" href="../ref/templates/builtins.html#std:templatetag-ssi"><tt class="xref std std-ttag docutils literal"><span class="pre">ssi</span></tt></a> template tags will be
modified so that the first argument to each tag is a
template variable, not an implied string. Until then, the new-style
behavior is provided in the <tt class="docutils literal"><span class="pre">future</span></tt> template tag library.</li>
<li>The <a class="reference internal" href="../ref/django-admin.html#django-admin-reset"><tt class="xref std std-djadmin docutils literal"><span class="pre">reset</span></tt></a> and <a class="reference internal" href="../ref/django-admin.html#django-admin-sqlreset"><tt class="xref std std-djadmin docutils literal"><span class="pre">sqlreset</span></tt></a> management commands
will be removed.</li>
<li>Authentication backends will need to support an inactive user
being passed to all methods dealing with permissions.
The <tt class="docutils literal"><span class="pre">supports_inactive_user</span></tt> attribute will no longer be checked
and can be removed from custom backends.</li>
<li><a class="reference internal" href="../ref/contrib/gis/geos.html#django.contrib.gis.geos.GEOSGeometry.transform" title="django.contrib.gis.geos.GEOSGeometry.transform"><tt class="xref py py-meth docutils literal"><span class="pre">transform()</span></tt></a> will raise
a <tt class="xref py py-class docutils literal"><span class="pre">GEOSException</span></tt> when called
on a geometry with no SRID value.</li>
<li><tt class="xref py py-class docutils literal"><span class="pre">CompatCookie</span></tt> will be removed in favor of
<tt class="xref py py-class docutils literal"><span class="pre">SimpleCookie</span></tt>.</li>
<li><tt class="xref py py-class docutils literal"><span class="pre">django.core.context_processors.PermWrapper</span></tt> and
<tt class="xref py py-class docutils literal"><span class="pre">django.core.context_processors.PermLookupDict</span></tt> will be removed in
favor of the corresponding
<tt class="xref py py-class docutils literal"><span class="pre">django.contrib.auth.context_processors.PermWrapper</span></tt> and
<tt class="xref py py-class docutils literal"><span class="pre">django.contrib.auth.context_processors.PermLookupDict</span></tt>,
respectively.</li>
<li>The <a class="reference internal" href="../ref/settings.html#std:setting-MEDIA_URL"><tt class="xref std std-setting docutils literal"><span class="pre">MEDIA_URL</span></tt></a> or <a class="reference internal" href="../ref/settings.html#std:setting-STATIC_URL"><tt class="xref std std-setting docutils literal"><span class="pre">STATIC_URL</span></tt></a> settings will be
required to end with a trailing slash to ensure there is a consistent
way to combine paths in templates.</li>
<li><tt class="docutils literal"><span class="pre">django.db.models.fields.URLField.verify_exists</span></tt> will be removed. The
feature was deprecated in 1.3.1 due to intractable security and
performance issues and will follow a slightly accelerated deprecation
timeframe.</li>
<li>Translations located under the so-called <em>project path</em> will be ignored during
the translation building process performed at runtime. The
<a class="reference internal" href="../ref/settings.html#std:setting-LOCALE_PATHS"><tt class="xref std std-setting docutils literal"><span class="pre">LOCALE_PATHS</span></tt></a> setting can be used for the same task by including the
filesystem path to a <tt class="docutils literal"><span class="pre">locale</span></tt> directory containing non-app-specific
translations in its value.</li>
<li>The Markup contrib app will no longer support versions of Python-Markdown
library earlier than 2.1. An accelerated timeline was used as this was
a security related deprecation.</li>
</ul>
</div>
<div class="section" id="s-id3">
<span id="id3"></span><h2>1.6<a class="headerlink" href="#id3" title="Permalink to this headline">¶</a></h2>
<p>See the <a class="reference internal" href="../releases/1.4.html"><em>Django 1.4 release notes</em></a> for more details on
these changes.</p>
<ul class="simple">
<li>The compatibility modules <tt class="docutils literal"><span class="pre">django.utils.copycompat</span></tt> and
<tt class="docutils literal"><span class="pre">django.utils.hashcompat</span></tt> as well as the functions
<tt class="docutils literal"><span class="pre">django.utils.itercompat.all</span></tt> and <tt class="docutils literal"><span class="pre">django.utils.itercompat.any</span></tt> will
be removed. The Python builtin versions should be used instead.</li>
<li>The <tt class="xref py py-func docutils literal"><span class="pre">csrf_response_exempt()</span></tt> and
<tt class="xref py py-func docutils literal"><span class="pre">csrf_view_exempt()</span></tt> decorators will
be removed. Since 1.4 <tt class="docutils literal"><span class="pre">csrf_response_exempt</span></tt> has been a no-op (it
returns the same function), and <tt class="docutils literal"><span class="pre">csrf_view_exempt</span></tt> has been a
synonym for <tt class="docutils literal"><span class="pre">django.views.decorators.csrf.csrf_exempt</span></tt>, which should
be used to replace it.</li>
<li>The <tt class="xref py py-class docutils literal"><span class="pre">CacheClass</span></tt> backend
was split into two in Django 1.3 in order to introduce support for
PyLibMC. The historical <tt class="xref py py-class docutils literal"><span class="pre">CacheClass</span></tt>
will be removed in favor of <tt class="xref py py-class docutils literal"><span class="pre">MemcachedCache</span></tt>.</li>
<li>The UK-prefixed objects of <tt class="docutils literal"><span class="pre">django.contrib.localflavor.uk</span></tt> will only
be accessible through their GB-prefixed names (GB is the correct
ISO 3166 code for United Kingdom).</li>
<li>The <a class="reference internal" href="../ref/settings.html#std:setting-IGNORABLE_404_STARTS"><tt class="xref std std-setting docutils literal"><span class="pre">IGNORABLE_404_STARTS</span></tt></a> and <a class="reference internal" href="../ref/settings.html#std:setting-IGNORABLE_404_ENDS"><tt class="xref std std-setting docutils literal"><span class="pre">IGNORABLE_404_ENDS</span></tt></a>
settings have been superseded by <a class="reference internal" href="../ref/settings.html#std:setting-IGNORABLE_404_URLS"><tt class="xref std std-setting docutils literal"><span class="pre">IGNORABLE_404_URLS</span></tt></a> in
the 1.4 release. They will be removed.</li>
<li>The <a class="reference internal" href="../ref/contrib/formtools/form-wizard.html"><em>form wizard</em></a> has been
refactored to use class based views with pluggable backends in 1.4.
The previous implementation will be removed.</li>
<li>Legacy ways of calling
<a class="reference internal" href="../topics/cache.html#django.views.decorators.cache.cache_page" title="django.views.decorators.cache.cache_page"><tt class="xref py py-func docutils literal"><span class="pre">cache_page()</span></tt></a> will be removed.</li>
<li>The backward-compatibility shim to automatically add a debug-false
filter to the <tt class="docutils literal"><span class="pre">'mail_admins'</span></tt> logging handler will be removed. The
<a class="reference internal" href="../ref/settings.html#std:setting-LOGGING"><tt class="xref std std-setting docutils literal"><span class="pre">LOGGING</span></tt></a> setting should include this filter explicitly if
it is desired.</li>
<li>The template tag
<tt class="xref py py-func docutils literal"><span class="pre">django.contrib.admin.templatetags.adminmedia.admin_media_prefix()</span></tt>
will be removed in favor of the generic static files handling.</li>
<li>The builtin truncation functions <tt class="xref py py-func docutils literal"><span class="pre">django.utils.text.truncate_words()</span></tt>
and <tt class="xref py py-func docutils literal"><span class="pre">django.utils.text.truncate_html_words()</span></tt> will be removed in
favor of the <tt class="docutils literal"><span class="pre">django.utils.text.Truncator</span></tt> class.</li>
<li>The <a class="reference internal" href="../ref/contrib/gis/geoip.html#django.contrib.gis.geoip.GeoIP" title="django.contrib.gis.geoip.GeoIP"><tt class="xref py py-class docutils literal"><span class="pre">GeoIP</span></tt></a> class was moved to
<a class="reference internal" href="../ref/contrib/gis/geoip.html#module-django.contrib.gis.geoip" title="django.contrib.gis.geoip: High-level Python interface for MaxMind's GeoIP C library."><tt class="xref py py-mod docutils literal"><span class="pre">django.contrib.gis.geoip</span></tt></a> in 1.4 – the shortcut in
<a class="reference internal" href="../ref/contrib/gis/utils.html#module-django.contrib.gis.utils" title="django.contrib.gis.utils: GeoDjango's collection of utilities."><tt class="xref py py-mod docutils literal"><span class="pre">django.contrib.gis.utils</span></tt></a> will be removed.</li>
<li><tt class="docutils literal"><span class="pre">django.conf.urls.defaults</span></tt> will be removed. The functions
<a class="reference internal" href="../topics/http/urls.html#django.conf.urls.include" title="django.conf.urls.include"><tt class="xref py py-func docutils literal"><span class="pre">include()</span></tt></a>, <a class="reference internal" href="../topics/http/urls.html#django.conf.urls.patterns" title="django.conf.urls.patterns"><tt class="xref py py-func docutils literal"><span class="pre">patterns()</span></tt></a> and
<a class="reference internal" href="../topics/http/urls.html#django.conf.urls.url" title="django.conf.urls.url"><tt class="xref py py-func docutils literal"><span class="pre">url()</span></tt></a> plus <a class="reference internal" href="../topics/http/urls.html#django.conf.urls.handler404" title="django.conf.urls.handler404"><tt class="xref py py-data docutils literal"><span class="pre">handler404</span></tt></a>,
<a class="reference internal" href="../topics/http/urls.html#django.conf.urls.handler500" title="django.conf.urls.handler500"><tt class="xref py py-data docutils literal"><span class="pre">handler500</span></tt></a>, are now available through
<a class="reference internal" href="../topics/http/urls.html#module-django.conf.urls" title="django.conf.urls"><tt class="xref py py-mod docutils literal"><span class="pre">django.conf.urls</span></tt></a> .</li>
<li>The Databrowse contrib module will be removed.</li>
<li>The functions <tt class="xref py py-func docutils literal"><span class="pre">setup_environ()</span></tt> and
<tt class="xref py py-func docutils literal"><span class="pre">execute_manager()</span></tt> will be removed from
<tt class="xref py py-mod docutils literal"><span class="pre">django.core.management</span></tt>. This also means that the old (pre-1.4)
style of <tt class="file docutils literal"><span class="pre">manage.py</span></tt> file will no longer work.</li>
<li>Setting the <tt class="docutils literal"><span class="pre">is_safe</span></tt> and <tt class="docutils literal"><span class="pre">needs_autoescape</span></tt> flags as attributes of
template filter functions will no longer be supported.</li>
<li>The attribute <tt class="docutils literal"><span class="pre">HttpRequest.raw_post_data</span></tt> was renamed to <tt class="docutils literal"><span class="pre">HttpRequest.body</span></tt>
in 1.4. The backward compatibility will be removed –
<tt class="docutils literal"><span class="pre">HttpRequest.raw_post_data</span></tt> will no longer work.</li>
</ul>
</div>
<div class="section" id="s-id4">
<span id="id4"></span><h2>2.0<a class="headerlink" href="#id4" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><tt class="docutils literal"><span class="pre">django.views.defaults.shortcut()</span></tt>. This function has been moved
to <tt class="docutils literal"><span class="pre">django.contrib.contenttypes.views.shortcut()</span></tt> as part of the
goal of removing all <tt class="docutils literal"><span class="pre">django.contrib</span></tt> references from the core
Django codebase. The old shortcut will be removed in the 2.0
release.</li>
</ul>
</div>
</div>
</div>
</div>
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