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This patch does not remove all occurrences of the words in question. Rather, I went through all of the occurrences of the words listed below, and judged if they a) suggested the reader had some kind of knowledge/experience, and b) if they added anything of value (including tone of voice, etc). I left most of the words alone. I looked at the following words: - simply/simple - easy/easier/easiest - obvious - just - merely - straightforward - ridiculous Thanks to Carlton Gibson for guidance on how to approach this issue, and to Tim Bell for providing the idea. But the enormous lion's share of thanks go to Adam Johnson for his patient and helpful review.
721 lines
27 KiB
Plaintext
721 lines
27 KiB
Plaintext
=======================
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``django.contrib.auth``
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=======================
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This document provides API reference material for the components of Django's
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authentication system. For more details on the usage of these components or
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how to customize authentication and authorization see the :doc:`authentication
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topic guide </topics/auth/index>`.
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.. currentmodule:: django.contrib.auth
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``User`` model
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==============
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Fields
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------
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.. class:: models.User
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:class:`~django.contrib.auth.models.User` objects have the following
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fields:
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.. attribute:: username
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Required. 150 characters or fewer. Usernames may contain alphanumeric,
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``_``, ``@``, ``+``, ``.`` and ``-`` characters.
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The ``max_length`` should be sufficient for many use cases. If you need
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a longer length, please use a :ref:`custom user model
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<specifying-custom-user-model>`. If you use MySQL with the ``utf8mb4``
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encoding (recommended for proper Unicode support), specify at most
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``max_length=191`` because MySQL can only create unique indexes with
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191 characters in that case by default.
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.. admonition:: Usernames and Unicode
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Django originally accepted only ASCII letters and numbers in
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usernames. Although it wasn't a deliberate choice, Unicode
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characters have always been accepted when using Python 3. Django
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1.10 officially added Unicode support in usernames, keeping the
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ASCII-only behavior on Python 2.
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.. attribute:: first_name
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Optional (:attr:`blank=True <django.db.models.Field.blank>`). 30
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characters or fewer.
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.. attribute:: last_name
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Optional (:attr:`blank=True <django.db.models.Field.blank>`). 150
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characters or fewer.
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.. attribute:: email
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Optional (:attr:`blank=True <django.db.models.Field.blank>`). Email
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address.
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.. attribute:: password
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Required. A hash of, and metadata about, the password. (Django doesn't
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store the raw password.) Raw passwords can be arbitrarily long and can
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contain any character. See the :doc:`password documentation
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</topics/auth/passwords>`.
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.. attribute:: groups
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Many-to-many relationship to :class:`~django.contrib.auth.models.Group`
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.. attribute:: user_permissions
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Many-to-many relationship to :class:`~django.contrib.auth.models.Permission`
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.. attribute:: is_staff
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Boolean. Designates whether this user can access the admin site.
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.. attribute:: is_active
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Boolean. Designates whether this user account should be considered
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active. We recommend that you set this flag to ``False`` instead of
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deleting accounts; that way, if your applications have any foreign keys
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to users, the foreign keys won't break.
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This doesn't necessarily control whether or not the user can log in.
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Authentication backends aren't required to check for the ``is_active``
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flag but the default backend
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(:class:`~django.contrib.auth.backends.ModelBackend`) and the
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:class:`~django.contrib.auth.backends.RemoteUserBackend` do. You can
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use :class:`~django.contrib.auth.backends.AllowAllUsersModelBackend`
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or :class:`~django.contrib.auth.backends.AllowAllUsersRemoteUserBackend`
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if you want to allow inactive users to login. In this case, you'll also
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want to customize the
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:class:`~django.contrib.auth.forms.AuthenticationForm` used by the
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:class:`~django.contrib.auth.views.LoginView` as it rejects inactive
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users. Be aware that the permission-checking methods such as
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:meth:`~django.contrib.auth.models.User.has_perm` and the
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authentication in the Django admin all return ``False`` for inactive
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users.
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.. attribute:: is_superuser
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Boolean. Designates that this user has all permissions without
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explicitly assigning them.
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.. attribute:: last_login
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A datetime of the user's last login.
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.. attribute:: date_joined
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A datetime designating when the account was created. Is set to the
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current date/time by default when the account is created.
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Attributes
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----------
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.. class:: models.User
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.. attribute:: is_authenticated
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Read-only attribute which is always ``True`` (as opposed to
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``AnonymousUser.is_authenticated`` which is always ``False``). This is
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a way to tell if the user has been authenticated. This does not imply
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any permissions and doesn't check if the user is active or has a valid
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session. Even though normally you will check this attribute on
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``request.user`` to find out whether it has been populated by the
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:class:`~django.contrib.auth.middleware.AuthenticationMiddleware`
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(representing the currently logged-in user), you should know this
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attribute is ``True`` for any :class:`~models.User` instance.
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.. attribute:: is_anonymous
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Read-only attribute which is always ``False``. This is a way of
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differentiating :class:`~models.User` and :class:`~models.AnonymousUser`
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objects. Generally, you should prefer using
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:attr:`~django.contrib.auth.models.User.is_authenticated` to this
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attribute.
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Methods
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-------
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.. class:: models.User
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.. method:: get_username()
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Returns the username for the user. Since the ``User`` model can be
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swapped out, you should use this method instead of referencing the
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username attribute directly.
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.. method:: get_full_name()
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Returns the :attr:`~django.contrib.auth.models.User.first_name` plus
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the :attr:`~django.contrib.auth.models.User.last_name`, with a space in
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between.
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.. method:: get_short_name()
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Returns the :attr:`~django.contrib.auth.models.User.first_name`.
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.. method:: set_password(raw_password)
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Sets the user's password to the given raw string, taking care of the
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password hashing. Doesn't save the
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:class:`~django.contrib.auth.models.User` object.
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When the ``raw_password`` is ``None``, the password will be set to an
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unusable password, as if
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:meth:`~django.contrib.auth.models.User.set_unusable_password()`
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were used.
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.. method:: check_password(raw_password)
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Returns ``True`` if the given raw string is the correct password for
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the user. (This takes care of the password hashing in making the
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comparison.)
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.. method:: set_unusable_password()
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Marks the user as having no password set. This isn't the same as
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having a blank string for a password.
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:meth:`~django.contrib.auth.models.User.check_password()` for this user
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will never return ``True``. Doesn't save the
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:class:`~django.contrib.auth.models.User` object.
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You may need this if authentication for your application takes place
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against an existing external source such as an LDAP directory.
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.. method:: has_usable_password()
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Returns ``False`` if
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:meth:`~django.contrib.auth.models.User.set_unusable_password()` has
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been called for this user.
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.. method:: get_user_permissions(obj=None)
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.. versionadded:: 3.0
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Returns a set of permission strings that the user has directly.
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If ``obj`` is passed in, only returns the user permissions for this
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specific object.
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.. method:: get_group_permissions(obj=None)
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Returns a set of permission strings that the user has, through their
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groups.
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If ``obj`` is passed in, only returns the group permissions for
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this specific object.
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.. method:: get_all_permissions(obj=None)
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Returns a set of permission strings that the user has, both through
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group and user permissions.
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If ``obj`` is passed in, only returns the permissions for this
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specific object.
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.. method:: has_perm(perm, obj=None)
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Returns ``True`` if the user has the specified permission, where perm
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is in the format ``"<app label>.<permission codename>"``. (see
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documentation on :ref:`permissions <topic-authorization>`). If the user is
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inactive, this method will always return ``False``. For an active
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superuser, this method will always return ``True``.
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If ``obj`` is passed in, this method won't check for a permission for
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the model, but for this specific object.
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.. method:: has_perms(perm_list, obj=None)
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Returns ``True`` if the user has each of the specified permissions,
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where each perm is in the format
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``"<app label>.<permission codename>"``. If the user is inactive,
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this method will always return ``False``. For an active superuser, this
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method will always return ``True``.
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If ``obj`` is passed in, this method won't check for permissions for
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the model, but for the specific object.
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.. method:: has_module_perms(package_name)
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Returns ``True`` if the user has any permissions in the given package
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(the Django app label). If the user is inactive, this method will
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always return ``False``. For an active superuser, this method will
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always return ``True``.
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.. method:: email_user(subject, message, from_email=None, **kwargs)
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Sends an email to the user. If ``from_email`` is ``None``, Django uses
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the :setting:`DEFAULT_FROM_EMAIL`. Any ``**kwargs`` are passed to the
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underlying :meth:`~django.core.mail.send_mail()` call.
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Manager methods
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---------------
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.. class:: models.UserManager
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The :class:`~django.contrib.auth.models.User` model has a custom manager
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that has the following helper methods (in addition to the methods provided
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by :class:`~django.contrib.auth.models.BaseUserManager`):
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.. method:: create_user(username, email=None, password=None, **extra_fields)
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Creates, saves and returns a :class:`~django.contrib.auth.models.User`.
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The :attr:`~django.contrib.auth.models.User.username` and
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:attr:`~django.contrib.auth.models.User.password` are set as given. The
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domain portion of :attr:`~django.contrib.auth.models.User.email` is
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automatically converted to lowercase, and the returned
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:class:`~django.contrib.auth.models.User` object will have
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:attr:`~django.contrib.auth.models.User.is_active` set to ``True``.
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If no password is provided,
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:meth:`~django.contrib.auth.models.User.set_unusable_password()` will
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be called.
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The ``extra_fields`` keyword arguments are passed through to the
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:class:`~django.contrib.auth.models.User`’s ``__init__`` method to
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allow setting arbitrary fields on a :ref:`custom user model
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<auth-custom-user>`.
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See :ref:`Creating users <topics-auth-creating-users>` for example usage.
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.. method:: create_superuser(username, email=None, password=None, **extra_fields)
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Same as :meth:`create_user`, but sets :attr:`~models.User.is_staff` and
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:attr:`~models.User.is_superuser` to ``True``.
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.. versionchanged:: 3.0
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The ``email`` and ``password`` parameters were made optional.
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.. method:: with_perm(perm, is_active=True, include_superusers=True, backend=None, obj=None)
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.. versionadded:: 3.0
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Returns users that have the given permission ``perm`` either in the
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``"<app label>.<permission codename>"`` format or as a
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:class:`~django.contrib.auth.models.Permission` instance. Returns an
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empty queryset if no users who have the ``perm`` found.
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If ``is_active`` is ``True`` (default), returns only active users, or
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if ``False``, returns only inactive users. Use ``None`` to return all
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users irrespective of active state.
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If ``include_superusers`` is ``True`` (default), the result will
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include superusers.
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If ``backend`` is passed in and it's defined in
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:setting:`AUTHENTICATION_BACKENDS`, then this method will use it.
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Otherwise, it will use the ``backend`` in
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:setting:`AUTHENTICATION_BACKENDS`, if there is only one, or raise an
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exception.
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``AnonymousUser`` object
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========================
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.. class:: models.AnonymousUser
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:class:`django.contrib.auth.models.AnonymousUser` is a class that
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implements the :class:`django.contrib.auth.models.User` interface, with
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these differences:
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* :ref:`id <automatic-primary-key-fields>` is always ``None``.
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* :attr:`~django.contrib.auth.models.User.username` is always the empty
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string.
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* :meth:`~django.contrib.auth.models.User.get_username()` always returns
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the empty string.
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* :attr:`~django.contrib.auth.models.User.is_anonymous` is ``True``
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instead of ``False``.
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* :attr:`~django.contrib.auth.models.User.is_authenticated` is
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``False`` instead of ``True``.
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* :attr:`~django.contrib.auth.models.User.is_staff` and
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:attr:`~django.contrib.auth.models.User.is_superuser` are always
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``False``.
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* :attr:`~django.contrib.auth.models.User.is_active` is always ``False``.
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* :attr:`~django.contrib.auth.models.User.groups` and
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:attr:`~django.contrib.auth.models.User.user_permissions` are always
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empty.
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* :meth:`~django.contrib.auth.models.User.set_password()`,
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:meth:`~django.contrib.auth.models.User.check_password()`,
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:meth:`~django.db.models.Model.save` and
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:meth:`~django.db.models.Model.delete()` raise :exc:`NotImplementedError`.
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In practice, you probably won't need to use
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:class:`~django.contrib.auth.models.AnonymousUser` objects on your own, but
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they're used by Web requests, as explained in the next section.
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``Permission`` model
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====================
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.. class:: models.Permission
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Fields
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------
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:class:`~django.contrib.auth.models.Permission` objects have the following
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fields:
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.. class:: models.Permission
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.. attribute:: name
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Required. 255 characters or fewer. Example: ``'Can vote'``.
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.. attribute:: content_type
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Required. A reference to the ``django_content_type`` database table,
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which contains a record for each installed model.
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.. attribute:: codename
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Required. 100 characters or fewer. Example: ``'can_vote'``.
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Methods
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-------
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:class:`~django.contrib.auth.models.Permission` objects have the standard
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data-access methods like any other :doc:`Django model </ref/models/instances>`.
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``Group`` model
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===============
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.. class:: models.Group
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Fields
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------
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:class:`~django.contrib.auth.models.Group` objects have the following fields:
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.. class:: models.Group
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.. attribute:: name
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Required. 150 characters or fewer. Any characters are permitted.
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Example: ``'Awesome Users'``.
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.. versionchanged:: 2.2
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The ``max_length`` increased from 80 to 150 characters.
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.. attribute:: permissions
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Many-to-many field to :class:`~django.contrib.auth.models.Permission`::
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group.permissions.set([permission_list])
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group.permissions.add(permission, permission, ...)
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group.permissions.remove(permission, permission, ...)
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group.permissions.clear()
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Validators
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==========
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.. class:: validators.ASCIIUsernameValidator
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A field validator allowing only ASCII letters and numbers, in addition to
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``@``, ``.``, ``+``, ``-``, and ``_``.
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.. class:: validators.UnicodeUsernameValidator
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A field validator allowing Unicode characters, in addition to ``@``, ``.``,
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``+``, ``-``, and ``_``. The default validator for ``User.username``.
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.. _topics-auth-signals:
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Login and logout signals
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========================
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.. module:: django.contrib.auth.signals
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The auth framework uses the following :doc:`signals </topics/signals>` that
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can be used for notification when a user logs in or out.
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.. function:: user_logged_in
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Sent when a user logs in successfully.
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Arguments sent with this signal:
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``sender``
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The class of the user that just logged in.
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``request``
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The current :class:`~django.http.HttpRequest` instance.
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``user``
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The user instance that just logged in.
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.. function:: user_logged_out
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Sent when the logout method is called.
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``sender``
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As above: the class of the user that just logged out or ``None``
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if the user was not authenticated.
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``request``
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The current :class:`~django.http.HttpRequest` instance.
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``user``
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The user instance that just logged out or ``None`` if the
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user was not authenticated.
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.. function:: user_login_failed
|
||
|
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Sent when the user failed to login successfully
|
||
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``sender``
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The name of the module used for authentication.
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``credentials``
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A dictionary of keyword arguments containing the user credentials that were
|
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passed to :func:`~django.contrib.auth.authenticate()` or your own custom
|
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authentication backend. Credentials matching a set of 'sensitive' patterns,
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(including password) will not be sent in the clear as part of the signal.
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``request``
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The :class:`~django.http.HttpRequest` object, if one was provided to
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:func:`~django.contrib.auth.authenticate`.
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|
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.. _authentication-backends-reference:
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|
||
Authentication backends
|
||
=======================
|
||
|
||
.. module:: django.contrib.auth.backends
|
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:synopsis: Django's built-in authentication backend classes.
|
||
|
||
This section details the authentication backends that come with Django. For
|
||
information on how to use them and how to write your own authentication
|
||
backends, see the :ref:`Other authentication sources section
|
||
<authentication-backends>` of the :doc:`User authentication guide
|
||
</topics/auth/index>`.
|
||
|
||
Available authentication backends
|
||
---------------------------------
|
||
|
||
The following backends are available in :mod:`django.contrib.auth.backends`:
|
||
|
||
.. class:: BaseBackend
|
||
|
||
.. versionadded:: 3.0
|
||
|
||
A base class that provides default implementations for all required
|
||
methods. By default, it will reject any user and provide no permissions.
|
||
|
||
.. method:: get_user_permissions(user_obj, obj=None)
|
||
|
||
Returns an empty set.
|
||
|
||
.. method:: get_group_permissions(user_obj, obj=None)
|
||
|
||
Returns an empty set.
|
||
|
||
.. method:: get_all_permissions(user_obj, obj=None)
|
||
|
||
Uses :meth:`get_user_permissions` and :meth:`get_group_permissions` to
|
||
get the set of permission strings the ``user_obj`` has.
|
||
|
||
.. method:: has_perm(user_obj, perm, obj=None)
|
||
|
||
Uses :meth:`get_all_permissions` to check if ``user_obj`` has the
|
||
permission string ``perm``.
|
||
|
||
.. class:: ModelBackend
|
||
|
||
This is the default authentication backend used by Django. It
|
||
authenticates using credentials consisting of a user identifier and
|
||
password. For Django's default user model, the user identifier is the
|
||
username, for custom user models it is the field specified by
|
||
USERNAME_FIELD (see :doc:`Customizing Users and authentication
|
||
</topics/auth/customizing>`).
|
||
|
||
It also handles the default permissions model as defined for
|
||
:class:`~django.contrib.auth.models.User` and
|
||
:class:`~django.contrib.auth.models.PermissionsMixin`.
|
||
|
||
:meth:`has_perm`, :meth:`get_all_permissions`, :meth:`get_user_permissions`,
|
||
and :meth:`get_group_permissions` allow an object to be passed as a
|
||
parameter for object-specific permissions, but this backend does not
|
||
implement them other than returning an empty set of permissions if
|
||
``obj is not None``.
|
||
|
||
:meth:`with_perm` also allows an object to be passed as a parameter, but
|
||
unlike others methods it returns an empty queryset if ``obj is not None``.
|
||
|
||
.. method:: authenticate(request, username=None, password=None, **kwargs)
|
||
|
||
Tries to authenticate ``username`` with ``password`` by calling
|
||
:meth:`User.check_password
|
||
<django.contrib.auth.models.User.check_password>`. If no ``username``
|
||
is provided, it tries to fetch a username from ``kwargs`` using the
|
||
key :attr:`CustomUser.USERNAME_FIELD
|
||
<django.contrib.auth.models.CustomUser.USERNAME_FIELD>`. Returns an
|
||
authenticated user or ``None``.
|
||
|
||
``request`` is an :class:`~django.http.HttpRequest` and may be ``None``
|
||
if it wasn't provided to :func:`~django.contrib.auth.authenticate`
|
||
(which passes it on to the backend).
|
||
|
||
.. method:: get_user_permissions(user_obj, obj=None)
|
||
|
||
Returns the set of permission strings the ``user_obj`` has from their
|
||
own user permissions. Returns an empty set if
|
||
:attr:`~django.contrib.auth.models.AbstractBaseUser.is_anonymous` or
|
||
:attr:`~django.contrib.auth.models.CustomUser.is_active` is ``False``.
|
||
|
||
.. method:: get_group_permissions(user_obj, obj=None)
|
||
|
||
Returns the set of permission strings the ``user_obj`` has from the
|
||
permissions of the groups they belong. Returns an empty set if
|
||
:attr:`~django.contrib.auth.models.AbstractBaseUser.is_anonymous` or
|
||
:attr:`~django.contrib.auth.models.CustomUser.is_active` is ``False``.
|
||
|
||
.. method:: get_all_permissions(user_obj, obj=None)
|
||
|
||
Returns the set of permission strings the ``user_obj`` has, including both
|
||
user permissions and group permissions. Returns an empty set if
|
||
:attr:`~django.contrib.auth.models.AbstractBaseUser.is_anonymous` or
|
||
:attr:`~django.contrib.auth.models.CustomUser.is_active` is ``False``.
|
||
|
||
.. method:: has_perm(user_obj, perm, obj=None)
|
||
|
||
Uses :meth:`get_all_permissions` to check if ``user_obj`` has the
|
||
permission string ``perm``. Returns ``False`` if the user is not
|
||
:attr:`~django.contrib.auth.models.CustomUser.is_active`.
|
||
|
||
.. method:: has_module_perms(user_obj, app_label)
|
||
|
||
Returns whether the ``user_obj`` has any permissions on the app
|
||
``app_label``.
|
||
|
||
.. method:: user_can_authenticate()
|
||
|
||
Returns whether the user is allowed to authenticate. To match the
|
||
behavior of :class:`~django.contrib.auth.forms.AuthenticationForm`
|
||
which :meth:`prohibits inactive users from logging in
|
||
<django.contrib.auth.forms.AuthenticationForm.confirm_login_allowed>`,
|
||
this method returns ``False`` for users with :attr:`is_active=False
|
||
<django.contrib.auth.models.User.is_active>`. Custom user models that
|
||
don't have an :attr:`~django.contrib.auth.models.CustomUser.is_active`
|
||
field are allowed.
|
||
|
||
.. method:: with_perm(perm, is_active=True, include_superusers=True, obj=None)
|
||
|
||
.. versionadded:: 3.0
|
||
|
||
Returns all active users who have the permission ``perm`` either in
|
||
the form of ``"<app label>.<permission codename>"`` or a
|
||
:class:`~django.contrib.auth.models.Permission` instance. Returns an
|
||
empty queryset if no users who have the ``perm`` found.
|
||
|
||
If ``is_active`` is ``True`` (default), returns only active users, or
|
||
if ``False``, returns only inactive users. Use ``None`` to return all
|
||
users irrespective of active state.
|
||
|
||
If ``include_superusers`` is ``True`` (default), the result will
|
||
include superusers.
|
||
|
||
.. class:: AllowAllUsersModelBackend
|
||
|
||
Same as :class:`ModelBackend` except that it doesn't reject inactive users
|
||
because :meth:`~ModelBackend.user_can_authenticate` always returns ``True``.
|
||
|
||
When using this backend, you'll likely want to customize the
|
||
:class:`~django.contrib.auth.forms.AuthenticationForm` used by the
|
||
:class:`~django.contrib.auth.views.LoginView` by overriding the
|
||
:meth:`~django.contrib.auth.forms.AuthenticationForm.confirm_login_allowed`
|
||
method as it rejects inactive users.
|
||
|
||
.. class:: RemoteUserBackend
|
||
|
||
Use this backend to take advantage of external-to-Django-handled
|
||
authentication. It authenticates using usernames passed in
|
||
:attr:`request.META['REMOTE_USER'] <django.http.HttpRequest.META>`. See
|
||
the :doc:`Authenticating against REMOTE_USER </howto/auth-remote-user>`
|
||
documentation.
|
||
|
||
If you need more control, you can create your own authentication backend
|
||
that inherits from this class and override these attributes or methods:
|
||
|
||
.. attribute:: create_unknown_user
|
||
|
||
``True`` or ``False``. Determines whether or not a user object is
|
||
created if not already in the database Defaults to ``True``.
|
||
|
||
.. method:: authenticate(request, remote_user)
|
||
|
||
The username passed as ``remote_user`` is considered trusted. This
|
||
method returns the user object with the given username, creating a new
|
||
user object if :attr:`~RemoteUserBackend.create_unknown_user` is
|
||
``True``.
|
||
|
||
Returns ``None`` if :attr:`~RemoteUserBackend.create_unknown_user` is
|
||
``False`` and a ``User`` object with the given username is not found in
|
||
the database.
|
||
|
||
``request`` is an :class:`~django.http.HttpRequest` and may be ``None``
|
||
if it wasn't provided to :func:`~django.contrib.auth.authenticate`
|
||
(which passes it on to the backend).
|
||
|
||
.. method:: clean_username(username)
|
||
|
||
Performs any cleaning on the ``username`` (e.g. stripping LDAP DN
|
||
information) prior to using it to get or create a user object. Returns
|
||
the cleaned username.
|
||
|
||
.. method:: configure_user(request, user)
|
||
|
||
Configures a newly created user. This method is called immediately
|
||
after a new user is created, and can be used to perform custom setup
|
||
actions, such as setting the user's groups based on attributes in an
|
||
LDAP directory. Returns the user object.
|
||
|
||
``request`` is an :class:`~django.http.HttpRequest` and may be ``None``
|
||
if it wasn't provided to :func:`~django.contrib.auth.authenticate`
|
||
(which passes it on to the backend).
|
||
|
||
.. versionchanged:: 2.2
|
||
|
||
The ``request`` argument was added. Support for method overrides
|
||
that don't accept it will be removed in Django 3.1.
|
||
|
||
.. method:: user_can_authenticate()
|
||
|
||
Returns whether the user is allowed to authenticate. This method
|
||
returns ``False`` for users with :attr:`is_active=False
|
||
<django.contrib.auth.models.User.is_active>`. Custom user models that
|
||
don't have an :attr:`~django.contrib.auth.models.CustomUser.is_active`
|
||
field are allowed.
|
||
|
||
.. class:: AllowAllUsersRemoteUserBackend
|
||
|
||
Same as :class:`RemoteUserBackend` except that it doesn't reject inactive
|
||
users because :attr:`~RemoteUserBackend.user_can_authenticate` always
|
||
returns ``True``.
|
||
|
||
Utility functions
|
||
=================
|
||
|
||
.. currentmodule:: django.contrib.auth
|
||
|
||
.. function:: get_user(request)
|
||
|
||
Returns the user model instance associated with the given ``request``’s
|
||
session.
|
||
|
||
It checks if the authentication backend stored in the session is present in
|
||
:setting:`AUTHENTICATION_BACKENDS`. If so, it uses the backend's
|
||
``get_user()`` method to retrieve the user model instance and then verifies
|
||
the session by calling the user model's
|
||
:meth:`~django.contrib.auth.models.AbstractBaseUser.get_session_auth_hash`
|
||
method.
|
||
|
||
Returns an instance of :class:`~django.contrib.auth.models.AnonymousUser`
|
||
if the authentication backend stored in the session is no longer in
|
||
:setting:`AUTHENTICATION_BACKENDS`, if a user isn't returned by the
|
||
backend's ``get_user()`` method, or if the session auth hash doesn't
|
||
validate.
|