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720 lines
19 KiB
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720 lines
19 KiB
Plaintext
===============
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Django settings
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===============
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A Django settings file contains all the configuration of your Django
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installation. This document explains how settings work and which settings are
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available.
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The basics
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==========
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A settings file is just a Python module with module-level variables.
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Here are a couple of example settings::
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DEBUG = False
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DEFAULT_FROM_EMAIL = 'webmaster@example.com'
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TEMPLATE_DIRS = ('/home/templates/mike', '/home/templates/john')
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Because a settings file is a Python module, the following apply:
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* It shouldn't have Python syntax errors.
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* It can assign settings dynamically using normal Python syntax.
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For example::
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MY_SETTING = [str(i) for i in range(30)]
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* It can import values from other settings files.
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Designating the settings
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========================
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When you use Django, you have to tell it which settings you're using. Do this
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by using an environment variable, ``DJANGO_SETTINGS_MODULE``.
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The value of ``DJANGO_SETTINGS_MODULE`` should be in Python path syntax, e.g.
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``"myproject.settings"``. Note that the settings module should be on the
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Python `import search path`_.
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.. _import search path: http://diveintopython.org/getting_to_know_python/everything_is_an_object.html
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The django-admin.py utility
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---------------------------
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When using `django-admin.py`_, you can either set the environment variable
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once, or explicitly pass in the settings module each time you run the utility.
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Example (Unix Bash shell)::
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export DJANGO_SETTINGS_MODULE=myproject.settings
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django-admin.py runserver
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Example (Windows shell)::
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set DJANGO_SETTINGS_MODULE=myproject.settings
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django-admin.py runserver
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Use the ``--settings`` command-line argument to specify the settings manually::
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django-admin.py runserver --settings=myproject.settings
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.. _django-admin.py: http://www.djangoproject.com/documentation/django_admin/
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On the server (mod_python)
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--------------------------
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In your live server environment, you'll need to tell Apache/mod_python which
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settings file to use. Do that with ``SetEnv``::
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<Location "/mysite/">
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SetHandler python-program
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PythonHandler django.core.handlers.modpython
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SetEnv DJANGO_SETTINGS_MODULE myproject.settings
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</Location>
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Read the `Django mod_python documentation`_ for more information.
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.. _Django mod_python documentation: http://www.djangoproject.com/documentation/modpython/
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Default settings
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================
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A Django settings file doesn't have to define any settings if it doesn't need
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to. Each setting has a sensible default value. These defaults live in the file
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``django/conf/global_settings.py``.
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Here's the algorithm Django uses in compiling settings:
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* Load settings from ``global_settings.py``.
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* Load settings from the specified settings file, overriding the global
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settings as necessary.
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Note that a settings file should *not* import from ``global_settings``, because
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that's redundant.
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Using settings in Python code
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=============================
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In your Django apps, use settings by importing them from
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``django.conf.settings``. Example::
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from django.conf.settings import DEBUG
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if DEBUG:
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# Do something
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Note that your code should *not* import from either ``global_settings`` or
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your own settings file. ``django.conf.settings`` abstracts the concepts of
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default settings and site-specific settings; it presents a single interface.
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Altering settings at runtime
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============================
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You shouldn't alter settings in your applications at runtime. For example,
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don't do this in a view::
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from django.conf.settings import DEBUG
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DEBUG = True # Don't do this!
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The only place you should assign to settings is in a settings file.
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Security
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========
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Because a settings file contains sensitive information, such as the database
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password, you should make every attempt to limit access to it. For example,
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change its file permissions so that only you and your Web server's user can
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read it. This is especially important in a shared-hosting environment.
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Available settings
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==================
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Here's a full list of all available settings, in alphabetical order, and their
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default values.
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ABSOLUTE_URL_OVERRIDES
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----------------------
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Default: ``{}`` (Empty dictionary)
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A dictionary mapping ``"app_label.module_name"`` strings to functions that take
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a model object and return its URL. This is a way of overriding
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``get_absolute_url()`` methods on a per-installation basis. Example::
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ABSOLUTE_URL_OVERRIDES = {
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'blogs.blogs': lambda o: "/blogs/%s/" % o.slug,
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'news.stories': lambda o: "/stories/%s/%s/" % (o.pub_year, o.slug),
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}
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ADMIN_FOR
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---------
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Default: ``()`` (Empty list)
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Used for admin-site settings modules, this should be a tuple of settings
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modules (in the format ``'foo.bar.baz'``) for which this site is an admin.
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ADMIN_MEDIA_PREFIX
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------------------
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Default: ``'/media/'``
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The URL prefix for admin media -- CSS, JavaScript and images. Make sure to use
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a trailing slash.
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ADMINS
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------
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Default: ``()`` (Empty tuple)
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A tuple that lists people who get code error notifications. When
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``DEBUG=False`` and a view raises an exception, Django will e-mail these people
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with the full exception information. Each member of the tuple should be a tuple
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of (Full name, e-mail address). Example::
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(('John', 'john@example.com'), ('Mary', 'mary@example.com'))
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ALLOWED_INCLUDE_ROOTS
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---------------------
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Default: ``()`` (Empty tuple)
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A tuple of strings representing allowed prefixes for the ``{% ssi %}`` template
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tag. This is a security measure, so that template authors can't access files
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that they shouldn't be accessing.
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For example, if ``ALLOWED_INCLUDE_ROOTS`` is ``('/home/html', '/var/www')``,
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then ``{% ssi /home/html/foo.txt %}`` would work, but ``{% ssi /etc/passwd %}``
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wouldn't.
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APPEND_SLASH
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------------
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Default: ``True``
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Whether to append trailing slashes to URLs. This is only used if
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``CommonMiddleware`` is installed (see the `middleware docs`_). See also
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``PREPEND_WWW``.
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CACHE_BACKEND
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-------------
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Default: ``'simple://'``
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The cache backend to use. See the `cache docs`_.
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CACHE_MIDDLEWARE_KEY_PREFIX
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Default: ``''`` (Empty string)
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The cache key prefix that the cache middleware should use. See the
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`cache docs`_.
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DATABASE_ENGINE
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---------------
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Default: ``'postgresql'``
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Which database backend to use. Either ``'postgresql'``, ``'mysql'``,
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``'sqlite3'`` or ``'ado_mssql'``.
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DATABASE_HOST
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-------------
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Default: ``''`` (Empty string)
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Which host to use when connecting to the database. An empty string means
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localhost. Not used with SQLite.
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DATABASE_NAME
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-------------
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Default: ``''`` (Empty string)
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The name of the database to use. For SQLite, it's the full path to the database
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file.
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DATABASE_PASSWORD
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-----------------
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Default: ``''`` (Empty string)
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The password to use when connecting to the database. Not used with SQLite.
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DATABASE_PORT
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-------------
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Default: ``''`` (Empty string)
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The port to use when connecting to the database. An empty string means the
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default port. Not used with SQLite.
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DATABASE_USER
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-------------
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Default: ``''`` (Empty string)
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The username to use when connecting to the database. Not used with SQLite.
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DATE_FORMAT
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-----------
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Default: ``'N j, Y'`` (e.g. ``Feb. 4, 2003``)
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The default formatting to use for date fields on Django admin change-list
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pages -- and, possibly, by other parts of the system. See
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`allowed date format strings`_.
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See also DATETIME_FORMAT and TIME_FORMAT.
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.. _allowed date format strings: http://www.djangoproject.com/documentation/templates/#now
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DATETIME_FORMAT
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---------------
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Default: ``'N j, Y, P'`` (e.g. ``Feb. 4, 2003, 4 p.m.``)
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The default formatting to use for datetime fields on Django admin change-list
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pages -- and, possibly, by other parts of the system. See
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`allowed date format strings`_.
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See also DATE_FORMAT and TIME_FORMAT.
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.. _allowed date format strings: http://www.djangoproject.com/documentation/templates/#now
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DEBUG
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-----
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Default: ``False``
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A boolean that turns on/off debug mode.
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DEFAULT_CHARSET
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---------------
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Default: ``'utf-8'``
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Default charset to use for all ``HttpResponse`` objects, if a MIME type isn't
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manually specified. Used with ``DEFAULT_CONTENT_TYPE`` to construct the
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``Content-Type`` header.
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DEFAULT_CONTENT_TYPE
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--------------------
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Default: ``'text/html'``
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Default content type to use for all ``HttpResponse`` objects, if a MIME type
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isn't manually specified. Used with ``DEFAULT_CHARSET`` to construct the
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``Content-Type`` header.
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DEFAULT_FROM_EMAIL
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------------------
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Default: ``'webmaster@localhost'``
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Default e-mail address to use for various automated correspondence from the
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site manager(s).
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DISALLOWED_USER_AGENTS
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----------------------
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Default: ``()`` (Empty tuple)
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List of compiled regular expression objects representing User-Agent strings
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that are not allowed to visit any page, systemwide. Use this for bad
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robots/crawlers. This is only used if ``CommonMiddleware`` is installed (see
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the `middleware docs`_).
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EMAIL_HOST
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----------
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Default: ``'localhost'``
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The host to use for sending e-mail.
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See also ``EMAIL_PORT``.
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EMAIL_HOST_PASSWORD
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-------------------
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Default: ``''`` (Empty string)
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**New in Django development version.**
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Username to use for the SMTP server defined in ``EMAIL_HOST``. If empty,
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Django won't attempt authentication.
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See also ``EMAIL_HOST_USER``.
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EMAIL_HOST_USER
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---------------
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Default: ``''`` (Empty string)
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**New in Django development version.**
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Username to use for the SMTP server defined in ``EMAIL_HOST``. If empty,
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Django won't attempt authentication.
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See also ``EMAIL_HOST_PASSWORD``.
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EMAIL_PORT
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----------
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Default: ``25``
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**New in Django development version.**
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Port to use for the SMTP server defined in ``EMAIL_HOST``.
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EMAIL_SUBJECT_PREFIX
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--------------------
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Default: ``'[Django] '``
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Subject-line prefix for e-mail messages sent with ``django.core.mail.mail_admins``
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or ``django.core.mail.mail_managers``. You'll probably want to include the
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trailing space.
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ENABLE_PSYCO
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------------
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Default: ``False``
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**New in Django development version.**
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Whether to enable Psyco, which optimizes Python code. Requires Psyco_.
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.. _Psyco: http://psyco.sourceforge.net/
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IGNORABLE_404_ENDS
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------------------
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Default: ``('mail.pl', 'mailform.pl', 'mail.cgi', 'mailform.cgi', 'favicon.ico', '.php')``
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See also ``IGNORABLE_404_STARTS``.
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IGNORABLE_404_STARTS
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--------------------
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Default: ``('/cgi-bin/', '/_vti_bin', '/_vti_inf')``
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A tuple of strings that specify beginnings of URLs that should be ignored by
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the 404 e-mailer. See ``SEND_BROKEN_LINK_EMAILS`` and ``IGNORABLE_404_ENDS``.
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INSTALLED_APPS
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--------------
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Default: ``()`` (Empty tuple)
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A tuple of strings designating all applications that are enabled in this Django
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installation. Each string should be a full Python path to a Python package that
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contains a Django application, as created by `django-admin.py startapp`_.
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.. _django-admin.py startapp: http://www.djangoproject.com/documentation/django_admin/#startapp-appname
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INTERNAL_IPS
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------------
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Default: ``()`` (Empty tuple)
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A tuple of IP addresses, as strings, that:
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* See debug comments, when ``DEBUG`` is ``True``
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* Receive X headers if the ``XViewMiddleware`` is installed (see the
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`middleware docs`_)
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JING_PATH
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---------
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Default: ``'/usr/bin/jing'``
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Path to the "Jing" executable. Jing is a RELAX NG validator, and Django uses it
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to validate each ``XMLField`` in your models.
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See http://www.thaiopensource.com/relaxng/jing.html .
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LANGUAGE_CODE
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-------------
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Default: ``'en-us'``
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A string representing the language code for this installation. This should be
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in standard language format. For example, U.S. English is ``"en-us"``. See the
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`internationalization docs`_.
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.. _internationalization docs: http://www.djangoproject.com/documentation/i18n/
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LANGUAGES
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---------
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Default: A tuple of all available languages. Currently, this is::
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LANGUAGES = (
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('bn', _('Bengali')),
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('cs', _('Czech')),
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('cy', _('Welsh')),
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('da', _('Danish')),
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('de', _('German')),
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('en', _('English')),
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('es', _('Spanish')),
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('fr', _('French')),
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('gl', _('Galician')),
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('is', _('Icelandic')),
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('it', _('Italian')),
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('no', _('Norwegian')),
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('pt-br', _('Brazilian')),
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('ro', _('Romanian')),
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('ru', _('Russian')),
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('sk', _('Slovak')),
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('sr', _('Serbian')),
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('sv', _('Swedish')),
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('zh-cn', _('Simplified Chinese')),
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)
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A tuple of two-tuples in the format (language code, language name). This
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specifies which languages are available for language selection. See the
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`internationalization docs`_ for details.
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Generally, the default value should suffice. Only set this setting if you want
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to restrict language selection to a subset of the Django-provided languages.
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MANAGERS
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--------
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Default: ``ADMINS`` (Whatever ``ADMINS`` is set to)
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A tuple in the same format as ``ADMINS`` that specifies who should get
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broken-link notifications when ``SEND_BROKEN_LINK_EMAILS=True``.
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MEDIA_ROOT
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----------
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Default: ``''`` (Empty string)
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Absolute path to the directory that holds media for this installation.
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Example: ``"/home/media/media.lawrence.com/"`` See also ``MEDIA_URL``.
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MEDIA_URL
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---------
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Default: ``''`` (Empty string)
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URL that handles the media served from ``MEDIA_ROOT``.
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Example: ``"http://media.lawrence.com"``
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MIDDLEWARE_CLASSES
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------------------
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Default::
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("django.middleware.sessions.SessionMiddleware",
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"django.middleware.common.CommonMiddleware",
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"django.middleware.doc.XViewMiddleware")
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A tuple of middleware classes to use. See the `middleware docs`_.
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PREPEND_WWW
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-----------
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Default: ``False``
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Whether to prepend the "www." subdomain to URLs that don't have it. This is
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only used if ``CommonMiddleware`` is installed (see the `middleware docs`_).
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See also ``APPEND_SLASH``.
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ROOT_URLCONF
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------------
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Default: Not defined
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A string representing the full Python import path to your root URLconf. For example:
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``"mydjangoapps.urls"``. See `How Django processes a request`_.
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.. _How Django processes a request: http://www.djangoproject.com/documentation/url_dispatch/#how-django-processes-a-request
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SECRET_KEY
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----------
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Default: ``''`` (Empty string)
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A secret key for this particular Django installation. Used to provide a seed in
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secret-key hashing algorithms. Set this to a random string -- the longer, the
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better. ``django-admin.py startproject`` creates one automatically.
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SEND_BROKEN_LINK_EMAILS
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-----------------------
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Default: ``False``
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Whether to send an e-mail to the ``MANAGERS`` each time somebody visits a
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Django-powered page that is 404ed with a non-empty referer (i.e., a broken
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link). This is only used if ``CommonMiddleware`` is installed (see the
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`middleware docs`_). See also ``IGNORABLE_404_STARTS`` and
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``IGNORABLE_404_ENDS``.
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SERVER_EMAIL
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------------
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Default: ``'root@localhost'``
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The e-mail address that error messages come from, such as those sent to
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``ADMINS`` and ``MANAGERS``.
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SESSION_COOKIE_AGE
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------------------
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Default: ``1209600`` (2 weeks, in seconds)
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The age of session cookies, in seconds. See the `session docs`_.
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SESSION_COOKIE_DOMAIN
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---------------------
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Default: ``None``
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The domain to use for session cookies. Set this to a string such as
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``".lawrence.com"`` for cross-domain cookies, or use ``None`` for a standard
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domain cookie. See the `session docs`_.
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|
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SESSION_COOKIE_NAME
|
|
-------------------
|
|
|
|
Default: ``'sessionid'``
|
|
|
|
The name of the cookie to use for sessions. This can be whatever you want.
|
|
See the `session docs`_.
|
|
|
|
SESSION_SAVE_EVERY_REQUEST
|
|
--------------------------
|
|
|
|
Default: ``False``
|
|
|
|
Whether to save the session data on every request. See the `session docs`_.
|
|
|
|
SITE_ID
|
|
-------
|
|
|
|
Default: Not defined
|
|
|
|
The ID, as an integer, of the current site in the ``sites`` database. This is
|
|
used so that application data can hook into specific site(s) and a single
|
|
database can manage content for multiple sites.
|
|
|
|
TEMPLATE_CONTEXT_PROCESSORS
|
|
---------------------------
|
|
|
|
Default::
|
|
|
|
("django.core.context_processors.auth",
|
|
"django.core.context_processors.debug",
|
|
"django.core.context_processors.i18n")
|
|
|
|
A tuple of callables that are used to populate the context in ``DjangoContext``.
|
|
These callables take a request object as their argument and return a dictionary
|
|
of items to be merged into the context.
|
|
|
|
TEMPLATE_DEBUG
|
|
--------------
|
|
|
|
Default: ``False``
|
|
|
|
A boolean that turns on/off template debug mode. If this is ``True``, the fancy
|
|
error page will display a detailed report for any ``TemplateSyntaxError``. This
|
|
report contains the relevant snippet of the template, with the appropriate line
|
|
highlighted.
|
|
|
|
Note that Django only displays fancy error pages if ``DEBUG`` is ``True``, so you'll
|
|
want to set that to take advantage of this setting.
|
|
|
|
See also DEBUG.
|
|
|
|
TEMPLATE_DIRS
|
|
-------------
|
|
|
|
Default: ``()`` (Empty tuple)
|
|
|
|
List of locations of the template source files, in search order. Note that
|
|
these paths should use Unix-style forward slashes, even on Windows.
|
|
|
|
See the `template documentation`_.
|
|
|
|
TEMPLATE_FILE_EXTENSION
|
|
-----------------------
|
|
|
|
Default: ``'.html'``
|
|
|
|
The file extension to append to all template names when searching for
|
|
templates. See the `template documentation`_.
|
|
|
|
TEMPLATE_LOADERS
|
|
----------------
|
|
|
|
Default: ``('django.core.template.loaders.filesystem.load_template_source',)``
|
|
|
|
A tuple of callables (as strings) that know how to import templates from
|
|
various sources. See the `template documentation`_.
|
|
|
|
TEMPLATE_STRING_IF_INVALID
|
|
--------------------------
|
|
|
|
Default: ``''`` (Empty string)
|
|
|
|
**New in Django development version.**
|
|
|
|
Output, as a string, that the template system should use for invalid (e.g.
|
|
misspelled) variables. See `How invalid variables are handled`_.
|
|
|
|
.. _How invalid variables are handled: http://www.djangoproject.com/documentation/templates_python/#how-invalid-variables-are-handled
|
|
|
|
TIME_FORMAT
|
|
-----------
|
|
|
|
Default: ``'P'`` (e.g. ``4 p.m.``)
|
|
|
|
The default formatting to use for time fields on Django admin change-list
|
|
pages -- and, possibly, by other parts of the system. See
|
|
`allowed date format strings`_.
|
|
|
|
See also DATE_FORMAT and DATETIME_FORMAT.
|
|
|
|
.. _allowed date format strings: http://www.djangoproject.com/documentation/templates/#now
|
|
|
|
TIME_ZONE
|
|
---------
|
|
|
|
Default: ``'America/Chicago'``
|
|
|
|
A string representing the time zone for this installation. `See available choices`_.
|
|
|
|
Note that this is the time zone to which Django will convert all dates/times --
|
|
not necessarily the timezone of the server. For example, one server may serve
|
|
multiple Django-powered sites, each with a separate time-zone setting.
|
|
|
|
USE_ETAGS
|
|
---------
|
|
|
|
Default: ``False``
|
|
|
|
A boolean that specifies whether to output the "Etag" header. This saves
|
|
bandwidth but slows down performance. This is only used if ``CommonMiddleware``
|
|
is installed (see the `middleware docs`_).
|
|
|
|
.. _cache docs: http://www.djangoproject.com/documentation/cache/
|
|
.. _middleware docs: http://www.djangoproject.com/documentation/middleware/
|
|
.. _session docs: http://www.djangoproject.com/documentation/sessions/
|
|
.. _See available choices: http://www.postgresql.org/docs/current/static/datetime-keywords.html#DATETIME-TIMEZONE-SET-TABLE
|
|
.. _template documentation: http://www.djangoproject.com/documentation/templates_python/
|
|
|
|
Creating your own settings
|
|
==========================
|
|
|
|
There's nothing stopping you from creating your own settings, for your own
|
|
Django apps. Just follow these conventions:
|
|
|
|
* Setting names are in all uppercase.
|
|
* For settings that are sequences, use tuples instead of lists. This is
|
|
purely for performance.
|
|
* Don't reinvent an already-existing setting.
|