Fields¶

class models.User

User objects have the following fields:

username¶

Required. 150 characters or fewer. Usernames may contain alphanumeric, _, @, +, . and - characters.

The max_length should be sufficient for many use cases. If you need a longer length, please use a custom user model. If you use MySQL with the utf8mb4 encoding (recommended for proper Unicode support), specify at most max_length=191 because MySQL can only create unique indexes with 191 characters in that case by default.

first_name¶

Optional (blank=True). 150 characters or fewer.

Changed in Django 3.1:

The max_length increased from 30 to 150 characters.

last_name¶

Optional (blank=True). 150 characters or fewer.

email¶

Optional (blank=True). Email address.

password¶

Required. A hash of, and metadata about, the password. (Django doesn’t store the raw password.) Raw passwords can be arbitrarily long and can contain any character. See the password documentation.

groups¶

Many-to-many relationship to Group

user_permissions¶

Many-to-many relationship to Permission

is_staff¶

Boolean. Designates whether this user can access the admin site.

is_active¶

Boolean. Designates whether this user account should be considered active. We recommend that you set this flag to False instead of deleting accounts; that way, if your applications have any foreign keys to users, the foreign keys won’t break.

This doesn’t necessarily control whether or not the user can log in. Authentication backends aren’t required to check for the is_active flag but the default backend (ModelBackend) and the RemoteUserBackend do. You can use AllowAllUsersModelBackend or AllowAllUsersRemoteUserBackend if you want to allow inactive users to login. In this case, you’ll also want to customize the AuthenticationForm used by the LoginView as it rejects inactive users. Be aware that the permission-checking methods such as has_perm() and the authentication in the Django admin all return False for inactive users.

is_superuser¶

Boolean. Designates that this user has all permissions without explicitly assigning them.

last_login¶

A datetime of the user’s last login.

date_joined¶

A datetime designating when the account was created. Is set to the current date/time by default when the account is created.

Attributes¶

class models.User

is_authenticated¶

Read-only attribute which is always True (as opposed to AnonymousUser.is_authenticated which is always False). This is a way to tell if the user has been authenticated. This does not imply any permissions and doesn’t check if the user is active or has a valid session. Even though normally you will check this attribute on request.user to find out whether it has been populated by the AuthenticationMiddleware (representing the currently logged-in user), you should know this attribute is True for any User instance.

is_anonymous¶

Read-only attribute which is always False. This is a way of differentiating User and AnonymousUser objects. Generally, you should prefer using is_authenticated to this attribute.

Methods¶

class models.User

get_username()¶

Returns the username for the user. Since the User model can be swapped out, you should use this method instead of referencing the username attribute directly.

get_full_name()¶

Returns the first_name plus the last_name, with a space in between.

get_short_name()¶

Returns the first_name.

set_password(raw_password)¶

Sets the user’s password to the given raw string, taking care of the password hashing. Doesn’t save the User object.

When the raw_password is None, the password will be set to an unusable password, as if set_unusable_password() were used.

check_password(raw_password)¶

Returns True if the given raw string is the correct password for the user. (This takes care of the password hashing in making the comparison.)

set_unusable_password()¶

Marks the user as having no password set. This isn’t the same as having a blank string for a password. check_password() for this user will never return True. Doesn’t save the User object.

You may need this if authentication for your application takes place against an existing external source such as an LDAP directory.

has_usable_password()¶

Returns False if set_unusable_password() has been called for this user.

get_user_permissions(obj=None)¶

Returns a set of permission strings that the user has directly.

If obj is passed in, only returns the user permissions for this specific object.

get_group_permissions(obj=None)¶

Returns a set of permission strings that the user has, through their groups.

If obj is passed in, only returns the group permissions for this specific object.

get_all_permissions(obj=None)¶

Returns a set of permission strings that the user has, both through group and user permissions.

If obj is passed in, only returns the permissions for this specific object.

has_perm(perm, obj=None)¶

Returns True if the user has the specified permission, where perm is in the format "<app label>.<permission codename>". (see documentation on permissions). If the user is inactive, this method will always return False. For an active superuser, this method will always return True.

If obj is passed in, this method won’t check for a permission for the model, but for this specific object.

has_perms(perm_list, obj=None)¶

Returns True if the user has each of the specified permissions, where each perm is in the format "<app label>.<permission codename>". If the user is inactive, this method will always return False. For an active superuser, this method will always return True.

If obj is passed in, this method won’t check for permissions for the model, but for the specific object.

has_module_perms(package_name)¶

Returns True if the user has any permissions in the given package (the Django app label). If the user is inactive, this method will always return False. For an active superuser, this method will always return True.

email_user(subject, message, from_email=None, **kwargs)¶

Sends an email to the user. If from_email is None, Django uses the DEFAULT_FROM_EMAIL. Any **kwargs are passed to the underlying send_mail() call.

Manager methods¶

class models.UserManager¶

The User model has a custom manager that has the following helper methods (in addition to the methods provided by BaseUserManager):

create_user(username, email=None, password=None, **extra_fields)¶

Creates, saves and returns a User.

The username and password are set as given. The domain portion of email is automatically converted to lowercase, and the returned User object will have is_active set to True.

If no password is provided, set_unusable_password() will be called.

The extra_fields keyword arguments are passed through to the User’s __init__ method to allow setting arbitrary fields on a custom user model.

See Creating users for example usage.

create_superuser(username, email=None, password=None, **extra_fields)¶

Same as create_user(), but sets is_staff and is_superuser to True.

with_perm(perm, is_active=True, include_superusers=True, backend=None, obj=None)¶

Returns users that have the given permission perm either in the "<app label>.<permission codename>" format or as a 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.

If backend is passed in and it’s defined in AUTHENTICATION_BACKENDS, then this method will use it. Otherwise, it will use the backend in AUTHENTICATION_BACKENDS, if there is only one, or raise an exception.

Fields¶

Permission objects have the following fields:

class models.Permission

name¶

Required. 255 characters or fewer. Example: 'Can vote'.

content_type¶

Required. A reference to the django_content_type database table, which contains a record for each installed model.

codename¶

Required. 100 characters or fewer. Example: 'can_vote'.

Methods¶

Permission objects have the standard data-access methods like any other Django model.

Fields¶

Group objects have the following fields:

class models.Group

name¶

Required. 150 characters or fewer. Any characters are permitted. Example: 'Awesome Users'.

permissions¶

Many-to-many field to Permission:

group.permissions.set([permission_list])
group.permissions.add(permission, permission, ...)
group.permissions.remove(permission, permission, ...)
group.permissions.clear()

Available authentication backends¶

The following backends are available in django.contrib.auth.backends:

class BaseBackend¶

A base class that provides default implementations for all required methods. By default, it will reject any user and provide no permissions.

get_user_permissions(user_obj, obj=None)¶

Returns an empty set.

get_group_permissions(user_obj, obj=None)¶

Returns an empty set.

get_all_permissions(user_obj, obj=None)¶

Uses get_user_permissions() and get_group_permissions() to get the set of permission strings the user_obj has.

has_perm(user_obj, perm, obj=None)¶

Uses 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 Customizing Users and authentication).

It also handles the default permissions model as defined for User and PermissionsMixin.

has_perm(), get_all_permissions(), get_user_permissions(), and 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.

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.

authenticate(request, username=None, password=None, **kwargs)¶

Tries to authenticate username with password by calling User.check_password. If no username is provided, it tries to fetch a username from kwargs using the key CustomUser.USERNAME_FIELD. Returns an authenticated user or None.

request is an HttpRequest and may be None if it wasn’t provided to authenticate() (which passes it on to the backend).

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 is_anonymous or is_active is False.

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 is_anonymous or is_active is False.

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 is_anonymous or is_active is False.

has_perm(user_obj, perm, obj=None)¶

Uses get_all_permissions() to check if user_obj has the permission string perm. Returns False if the user is not is_active.

has_module_perms(user_obj, app_label)¶

Returns whether the user_obj has any permissions on the app app_label.

user_can_authenticate()¶

Returns whether the user is allowed to authenticate. To match the behavior of AuthenticationForm which prohibits inactive users from logging in, this method returns False for users with is_active=False. Custom user models that don’t have an is_active field are allowed.

with_perm(perm, is_active=True, include_superusers=True, obj=None)¶

Returns all active users who have the permission perm either in the form of "<app label>.<permission codename>" or a 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 ModelBackend except that it doesn’t reject inactive users because user_can_authenticate() always returns True.

When using this backend, you’ll likely want to customize the AuthenticationForm used by the LoginView by overriding the 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 request.META['REMOTE_USER']. See the Authenticating against 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:

create_unknown_user¶

True or False. Determines whether or not a user object is created if not already in the database Defaults to True.

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 create_unknown_user is True.

Returns None if create_unknown_user is False and a User object with the given username is not found in the database.

request is an HttpRequest and may be None if it wasn’t provided to authenticate() (which passes it on to the backend).

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.

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 HttpRequest and may be None if it wasn’t provided to authenticate() (which passes it on to the backend).

user_can_authenticate()¶

Returns whether the user is allowed to authenticate. This method returns False for users with is_active=False. Custom user models that don’t have an is_active field are allowed.

class AllowAllUsersRemoteUserBackend¶

Same as RemoteUserBackend except that it doesn’t reject inactive users because user_can_authenticate always returns True.