/usr/lib/python2.7/dist-packages/guardian/managers.py is in python-django-guardian 1.2.4+git20141127-0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from django.db import models
from django.contrib.contenttypes.models import ContentType
from guardian.exceptions import ObjectNotPersisted
from guardian.models import Permission
import warnings
# TODO: consolidate UserObjectPermissionManager and GroupObjectPermissionManager
class BaseObjectPermissionManager(models.Manager):
def is_generic(self):
try:
self.model._meta.get_field('object_pk')
return True
except models.fields.FieldDoesNotExist:
return False
class UserObjectPermissionManager(BaseObjectPermissionManager):
def assign_perm(self, perm, user, obj):
"""
Assigns permission with given ``perm`` for an instance ``obj`` and
``user``.
"""
if getattr(obj, 'pk', None) is None:
raise ObjectNotPersisted("Object %s needs to be persisted first"
% obj)
ctype = ContentType.objects.get_for_model(obj)
permission = Permission.objects.get(content_type=ctype, codename=perm)
kwargs = {'permission': permission, 'user': user}
if self.is_generic():
kwargs['content_type'] = ctype
kwargs['object_pk'] = obj.pk
else:
kwargs['content_object'] = obj
obj_perm, created = self.get_or_create(**kwargs)
return obj_perm
def assign(self, perm, user, obj):
""" Depreciated function name left in for compatibility"""
warnings.warn("UserObjectPermissionManager method 'assign' is being renamed to 'assign_perm'. Update your code accordingly as old name will be depreciated in 2.0 version.", DeprecationWarning)
return self.assign_perm(perm, user, obj)
def remove_perm(self, perm, user, obj):
"""
Removes permission ``perm`` for an instance ``obj`` and given ``user``.
Please note that we do NOT fetch object permission from database - we
use ``Queryset.delete`` method for removing it. Main implication of this
is that ``post_delete`` signals would NOT be fired.
"""
if getattr(obj, 'pk', None) is None:
raise ObjectNotPersisted("Object %s needs to be persisted first"
% obj)
filters = {
'permission__codename': perm,
'permission__content_type': ContentType.objects.get_for_model(obj),
'user': user,
}
if self.is_generic():
filters['object_pk'] = obj.pk
else:
filters['content_object__pk'] = obj.pk
self.filter(**filters).delete()
class GroupObjectPermissionManager(BaseObjectPermissionManager):
def assign_perm(self, perm, group, obj):
"""
Assigns permission with given ``perm`` for an instance ``obj`` and
``group``.
"""
if getattr(obj, 'pk', None) is None:
raise ObjectNotPersisted("Object %s needs to be persisted first"
% obj)
ctype = ContentType.objects.get_for_model(obj)
permission = Permission.objects.get(content_type=ctype, codename=perm)
kwargs = {'permission': permission, 'group': group}
if self.is_generic():
kwargs['content_type'] = ctype
kwargs['object_pk'] = obj.pk
else:
kwargs['content_object'] = obj
obj_perm, created = self.get_or_create(**kwargs)
return obj_perm
def assign(self, perm, user, obj):
""" Depreciated function name left in for compatibility"""
warnings.warn("UserObjectPermissionManager method 'assign' is being renamed to 'assign_perm'. Update your code accordingly as old name will be depreciated in 2.0 version.", DeprecationWarning)
return self.assign_perm(perm, user, obj)
def remove_perm(self, perm, group, obj):
"""
Removes permission ``perm`` for an instance ``obj`` and given ``group``.
"""
if getattr(obj, 'pk', None) is None:
raise ObjectNotPersisted("Object %s needs to be persisted first"
% obj)
filters = {
'permission__codename': perm,
'permission__content_type': ContentType.objects.get_for_model(obj),
'group': group,
}
if self.is_generic():
filters['object_pk'] = obj.pk
else:
filters['content_object__pk'] = obj.pk
self.filter(**filters).delete()
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