Mixin to apply over the Django `User` or `AbstractUser` model, this will change the superuser checkbox to a datetime field that will expire.
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from datetime import timedelta | |
from django.db import models | |
from django.utils.timezone import now | |
class ExpiringSuperuserMixin: | |
_is_superuser = models.DateTimeField( | |
_('superuser until'), | |
blank=True, | |
null=True, | |
default=None, | |
help_text=_('Until when the user has special top-level permissions. Use with extra caution, ' | |
'this includes most destructive permissions. Only specify a very limited timeframe.'), | |
) | |
def save(self, *args, **kwargs): | |
"""Clear superuser field if expired. | |
""" | |
try: | |
if self._is_superuser < now(): | |
self._is_superuser = None | |
except TypeError: | |
pass | |
return super().save(*args, **kwargs) | |
@property | |
def is_superuser(self): | |
"""Evaluate if superuser datetime is not due or None. | |
If the datetime is due then reset the field to None. | |
""" | |
try: | |
is_within_window = self._is_superuser > now() | |
except TypeError: | |
return False | |
else: | |
if not is_within_window: | |
self._is_superuser = None | |
self.save(update_fields=['_is_superuser']) | |
return False | |
return True | |
@is_superuser.setter | |
def is_superuser(self, value): | |
"""Backwards compatibility: set a default time for superuser. | |
When using `manage.py createsuperuser`, this method will be called with `value=True`. | |
In that case we need to set a default time starting now. | |
""" | |
if isinstance(value, datetime): | |
self._is_superuser = value | |
elif value is True: | |
self._is_superuser = now() + timedelta(minutes=30) | |
else: | |
self._is_superuser = None | |
class Meta(AbstractUser.Meta): | |
permissions = [('can_assign_superuser', 'Can assign superuser')] # Creates permission on model creation |
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from django.contrib.auth.admin import UserAdmin as AuthUserAdmin | |
class UserAdmin(AuthUserAdmin): | |
fieldsets = ( | |
(None, {"fields": ("username", "password")}), | |
(_("Personal info"), {"fields": ("first_name", "last_name", "email")}), | |
( | |
_("Permissions"), | |
{ | |
"fields": ( | |
"is_active", | |
"is_staff", | |
"_is_superuser", # <-- | |
"groups", | |
"user_permissions", | |
), | |
}, | |
), | |
(_("Important dates"), {"fields": ("last_login", "date_joined")}), | |
) | |
list_filter = ("is_staff", "_is_superuser", "is_active", "groups") | |
def get_readonly_fields(self, request, obj=None): | |
"""Only allow editing superuser status when has can_assign_superuser perm. | |
The has_perm() check also triggers is_superuser() to reset it if needed. | |
""" | |
readonly_fields = super().get_readonly_fields(request, obj) | |
if not request.user.has_perm('profiles.can_assign_superuser'): | |
readonly_fields += ('_is_superuser',) | |
return readonly_fields |
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