437 lines
14 KiB
Python
437 lines
14 KiB
Python
from django.contrib import auth
|
|
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.core.exceptions import PermissionDenied
|
|
from django.core.mail import send_mail
|
|
from django.db import models
|
|
from django.db.models.manager import EmptyManager
|
|
from django.utils import timezone
|
|
from django.utils.translation import gettext_lazy as _
|
|
|
|
from .validators import UnicodeUsernameValidator
|
|
|
|
|
|
def update_last_login(sender, user, **kwargs):
|
|
"""
|
|
A signal receiver which updates the last_login date for
|
|
the user logging in.
|
|
"""
|
|
user.last_login = timezone.now()
|
|
user.save(update_fields=['last_login'])
|
|
|
|
|
|
class PermissionManager(models.Manager):
|
|
use_in_migrations = True
|
|
|
|
def get_by_natural_key(self, codename, app_label, model):
|
|
return self.get(
|
|
codename=codename,
|
|
content_type=ContentType.objects.db_manager(self.db).get_by_natural_key(app_label, model),
|
|
)
|
|
|
|
|
|
class Permission(models.Model):
|
|
"""
|
|
The permissions system provides a way to assign permissions to specific
|
|
users and groups of users.
|
|
|
|
The permission system is used by the Django admin site, but may also be
|
|
useful in your own code. The Django admin site uses permissions as follows:
|
|
|
|
- The "add" permission limits the user's ability to view the "add" form
|
|
and add an object.
|
|
- The "change" permission limits a user's ability to view the change
|
|
list, view the "change" form and change an object.
|
|
- The "delete" permission limits the ability to delete an object.
|
|
|
|
Permissions are set globally per type of object, not per specific object
|
|
instance. It is possible to say "Mary may change news stories," but it's
|
|
not currently possible to say "Mary may change news stories, but only the
|
|
ones she created herself" or "Mary may only change news stories that have a
|
|
certain status or publication date."
|
|
|
|
Three basic permissions -- add, change and delete -- are automatically
|
|
created for each Django model.
|
|
"""
|
|
name = models.CharField(_('name'), max_length=255)
|
|
content_type = models.ForeignKey(
|
|
ContentType,
|
|
models.CASCADE,
|
|
verbose_name=_('content type'),
|
|
)
|
|
codename = models.CharField(_('codename'), max_length=100)
|
|
objects = PermissionManager()
|
|
|
|
class Meta:
|
|
verbose_name = _('permission')
|
|
verbose_name_plural = _('permissions')
|
|
unique_together = (('content_type', 'codename'),)
|
|
ordering = ('content_type__app_label', 'content_type__model',
|
|
'codename')
|
|
|
|
def __str__(self):
|
|
return "%s | %s | %s" % (
|
|
self.content_type.app_label,
|
|
self.content_type,
|
|
self.name,
|
|
)
|
|
|
|
def natural_key(self):
|
|
return (self.codename,) + self.content_type.natural_key()
|
|
natural_key.dependencies = ['contenttypes.contenttype']
|
|
|
|
|
|
class GroupManager(models.Manager):
|
|
"""
|
|
The manager for the auth's Group model.
|
|
"""
|
|
use_in_migrations = True
|
|
|
|
def get_by_natural_key(self, name):
|
|
return self.get(name=name)
|
|
|
|
|
|
class Group(models.Model):
|
|
"""
|
|
Groups are a generic way of categorizing users to apply permissions, or
|
|
some other label, to those users. A user can belong to any number of
|
|
groups.
|
|
|
|
A user in a group automatically has all the permissions granted to that
|
|
group. For example, if the group 'Site editors' has the permission
|
|
can_edit_home_page, any user in that group will have that permission.
|
|
|
|
Beyond permissions, groups are a convenient way to categorize users to
|
|
apply some label, or extended functionality, to them. For example, you
|
|
could create a group 'Special users', and you could write code that would
|
|
do special things to those users -- such as giving them access to a
|
|
members-only portion of your site, or sending them members-only email
|
|
messages.
|
|
"""
|
|
name = models.CharField(_('name'), max_length=80, unique=True)
|
|
permissions = models.ManyToManyField(
|
|
Permission,
|
|
verbose_name=_('permissions'),
|
|
blank=True,
|
|
)
|
|
|
|
objects = GroupManager()
|
|
|
|
class Meta:
|
|
verbose_name = _('group')
|
|
verbose_name_plural = _('groups')
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
def natural_key(self):
|
|
return (self.name,)
|
|
|
|
|
|
class UserManager(BaseUserManager):
|
|
use_in_migrations = True
|
|
|
|
def _create_user(self, username, email, password, **extra_fields):
|
|
"""
|
|
Create and save a user with the given username, email, and password.
|
|
"""
|
|
if not username:
|
|
raise ValueError('The given username must be set')
|
|
email = self.normalize_email(email)
|
|
username = self.model.normalize_username(username)
|
|
user = self.model(username=username, email=email, **extra_fields)
|
|
user.set_password(password)
|
|
user.save(using=self._db)
|
|
return user
|
|
|
|
def create_user(self, username, email=None, password=None, **extra_fields):
|
|
extra_fields.setdefault('is_staff', False)
|
|
extra_fields.setdefault('is_superuser', False)
|
|
return self._create_user(username, email, password, **extra_fields)
|
|
|
|
def create_superuser(self, username, email, password, **extra_fields):
|
|
extra_fields.setdefault('is_staff', True)
|
|
extra_fields.setdefault('is_superuser', True)
|
|
|
|
if extra_fields.get('is_staff') is not True:
|
|
raise ValueError('Superuser must have is_staff=True.')
|
|
if extra_fields.get('is_superuser') is not True:
|
|
raise ValueError('Superuser must have is_superuser=True.')
|
|
|
|
return self._create_user(username, email, password, **extra_fields)
|
|
|
|
|
|
# A few helper functions for common logic between User and AnonymousUser.
|
|
def _user_get_all_permissions(user, obj):
|
|
permissions = set()
|
|
for backend in auth.get_backends():
|
|
if hasattr(backend, "get_all_permissions"):
|
|
permissions.update(backend.get_all_permissions(user, obj))
|
|
return permissions
|
|
|
|
|
|
def _user_has_perm(user, perm, obj):
|
|
"""
|
|
A backend can raise `PermissionDenied` to short-circuit permission checking.
|
|
"""
|
|
for backend in auth.get_backends():
|
|
if not hasattr(backend, 'has_perm'):
|
|
continue
|
|
try:
|
|
if backend.has_perm(user, perm, obj):
|
|
return True
|
|
except PermissionDenied:
|
|
return False
|
|
return False
|
|
|
|
|
|
def _user_has_module_perms(user, app_label):
|
|
"""
|
|
A backend can raise `PermissionDenied` to short-circuit permission checking.
|
|
"""
|
|
for backend in auth.get_backends():
|
|
if not hasattr(backend, 'has_module_perms'):
|
|
continue
|
|
try:
|
|
if backend.has_module_perms(user, app_label):
|
|
return True
|
|
except PermissionDenied:
|
|
return False
|
|
return False
|
|
|
|
|
|
class PermissionsMixin(models.Model):
|
|
"""
|
|
Add the fields and methods necessary to support the Group and Permission
|
|
models using the ModelBackend.
|
|
"""
|
|
is_superuser = models.BooleanField(
|
|
_('superuser status'),
|
|
default=False,
|
|
help_text=_(
|
|
'Designates that this user has all permissions without '
|
|
'explicitly assigning them.'
|
|
),
|
|
)
|
|
groups = models.ManyToManyField(
|
|
Group,
|
|
verbose_name=_('groups'),
|
|
blank=True,
|
|
help_text=_(
|
|
'The groups this user belongs to. A user will get all permissions '
|
|
'granted to each of their groups.'
|
|
),
|
|
related_name="user_set",
|
|
related_query_name="user",
|
|
)
|
|
user_permissions = models.ManyToManyField(
|
|
Permission,
|
|
verbose_name=_('user permissions'),
|
|
blank=True,
|
|
help_text=_('Specific permissions for this user.'),
|
|
related_name="user_set",
|
|
related_query_name="user",
|
|
)
|
|
|
|
class Meta:
|
|
abstract = True
|
|
|
|
def get_group_permissions(self, obj=None):
|
|
"""
|
|
Return a list of permission strings that this user has through their
|
|
groups. Query all available auth backends. If an object is passed in,
|
|
return only permissions matching this object.
|
|
"""
|
|
permissions = set()
|
|
for backend in auth.get_backends():
|
|
if hasattr(backend, "get_group_permissions"):
|
|
permissions.update(backend.get_group_permissions(self, obj))
|
|
return permissions
|
|
|
|
def get_all_permissions(self, obj=None):
|
|
return _user_get_all_permissions(self, obj)
|
|
|
|
def has_perm(self, perm, obj=None):
|
|
"""
|
|
Return True if the user has the specified permission. Query all
|
|
available auth backends, but return immediately if any backend returns
|
|
True. Thus, a user who has permission from a single auth backend is
|
|
assumed to have permission in general. If an object is provided, check
|
|
permissions for that object.
|
|
"""
|
|
# Active superusers have all permissions.
|
|
if self.is_active and self.is_superuser:
|
|
return True
|
|
|
|
# Otherwise we need to check the backends.
|
|
return _user_has_perm(self, perm, obj)
|
|
|
|
def has_perms(self, perm_list, obj=None):
|
|
"""
|
|
Return True if the user has each of the specified permissions. If
|
|
object is passed, check if the user has all required perms for it.
|
|
"""
|
|
return all(self.has_perm(perm, obj) for perm in perm_list)
|
|
|
|
def has_module_perms(self, app_label):
|
|
"""
|
|
Return True if the user has any permissions in the given app label.
|
|
Use simlar logic as has_perm(), above.
|
|
"""
|
|
# Active superusers have all permissions.
|
|
if self.is_active and self.is_superuser:
|
|
return True
|
|
|
|
return _user_has_module_perms(self, app_label)
|
|
|
|
|
|
class AbstractUser(AbstractBaseUser, PermissionsMixin):
|
|
"""
|
|
An abstract base class implementing a fully featured User model with
|
|
admin-compliant permissions.
|
|
|
|
Username and password are required. Other fields are optional.
|
|
"""
|
|
username_validator = UnicodeUsernameValidator()
|
|
|
|
username = models.CharField(
|
|
_('username'),
|
|
max_length=150,
|
|
unique=True,
|
|
help_text=_('Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.'),
|
|
validators=[username_validator],
|
|
error_messages={
|
|
'unique': _("A user with that username already exists."),
|
|
},
|
|
)
|
|
first_name = models.CharField(_('first name'), max_length=30, blank=True)
|
|
last_name = models.CharField(_('last name'), max_length=150, blank=True)
|
|
email = models.EmailField(_('email address'), blank=True)
|
|
is_staff = models.BooleanField(
|
|
_('staff status'),
|
|
default=False,
|
|
help_text=_('Designates whether the user can log into this admin site.'),
|
|
)
|
|
is_active = models.BooleanField(
|
|
_('active'),
|
|
default=True,
|
|
help_text=_(
|
|
'Designates whether this user should be treated as active. '
|
|
'Unselect this instead of deleting accounts.'
|
|
),
|
|
)
|
|
date_joined = models.DateTimeField(_('date joined'), default=timezone.now)
|
|
|
|
objects = UserManager()
|
|
|
|
EMAIL_FIELD = 'email'
|
|
USERNAME_FIELD = 'username'
|
|
REQUIRED_FIELDS = ['email']
|
|
|
|
class Meta:
|
|
verbose_name = _('user')
|
|
verbose_name_plural = _('users')
|
|
abstract = True
|
|
|
|
def clean(self):
|
|
super().clean()
|
|
self.email = self.__class__.objects.normalize_email(self.email)
|
|
|
|
def get_full_name(self):
|
|
"""
|
|
Return the first_name plus the last_name, with a space in between.
|
|
"""
|
|
full_name = '%s %s' % (self.first_name, self.last_name)
|
|
return full_name.strip()
|
|
|
|
def get_short_name(self):
|
|
"""Return the short name for the user."""
|
|
return self.first_name
|
|
|
|
def email_user(self, subject, message, from_email=None, **kwargs):
|
|
"""Send an email to this user."""
|
|
send_mail(subject, message, from_email, [self.email], **kwargs)
|
|
|
|
|
|
class User(AbstractUser):
|
|
"""
|
|
Users within the Django authentication system are represented by this
|
|
model.
|
|
|
|
Username, password and email are required. Other fields are optional.
|
|
"""
|
|
class Meta(AbstractUser.Meta):
|
|
swappable = 'AUTH_USER_MODEL'
|
|
|
|
|
|
class AnonymousUser:
|
|
id = None
|
|
pk = None
|
|
username = ''
|
|
is_staff = False
|
|
is_active = False
|
|
is_superuser = False
|
|
_groups = EmptyManager(Group)
|
|
_user_permissions = EmptyManager(Permission)
|
|
|
|
def __init__(self):
|
|
pass
|
|
|
|
def __str__(self):
|
|
return 'AnonymousUser'
|
|
|
|
def __eq__(self, other):
|
|
return isinstance(other, self.__class__)
|
|
|
|
def __hash__(self):
|
|
return 1 # instances always return the same hash value
|
|
|
|
def save(self):
|
|
raise NotImplementedError("Django doesn't provide a DB representation for AnonymousUser.")
|
|
|
|
def delete(self):
|
|
raise NotImplementedError("Django doesn't provide a DB representation for AnonymousUser.")
|
|
|
|
def set_password(self, raw_password):
|
|
raise NotImplementedError("Django doesn't provide a DB representation for AnonymousUser.")
|
|
|
|
def check_password(self, raw_password):
|
|
raise NotImplementedError("Django doesn't provide a DB representation for AnonymousUser.")
|
|
|
|
@property
|
|
def groups(self):
|
|
return self._groups
|
|
|
|
@property
|
|
def user_permissions(self):
|
|
return self._user_permissions
|
|
|
|
def get_group_permissions(self, obj=None):
|
|
return set()
|
|
|
|
def get_all_permissions(self, obj=None):
|
|
return _user_get_all_permissions(self, obj=obj)
|
|
|
|
def has_perm(self, perm, obj=None):
|
|
return _user_has_perm(self, perm, obj=obj)
|
|
|
|
def has_perms(self, perm_list, obj=None):
|
|
for perm in perm_list:
|
|
if not self.has_perm(perm, obj):
|
|
return False
|
|
return True
|
|
|
|
def has_module_perms(self, module):
|
|
return _user_has_module_perms(self, module)
|
|
|
|
@property
|
|
def is_anonymous(self):
|
|
return True
|
|
|
|
@property
|
|
def is_authenticated(self):
|
|
return False
|
|
|
|
def get_username(self):
|
|
return self.username
|