Chore: drop get_groups_with_only_permission

It worked around get_groups_with_perms lacking only_with_perms_in, which
django-guardian added in 3.1.0. The pinned version is newer.

src/documents/bulk_edit.py

@@ -34,6 +34,7 @@ from documents.models import DocumentType
 from documents.models import PaperlessTask
 from documents.models import StoragePath
 from documents.models import Tag
+from documents.permissions import PermissionsSpec
 from documents.permissions import set_permissions_for_objects
 from documents.plugins.helpers import DocumentsStatusManager
 from documents.tasks import bulk_update_documents
@@ -445,7 +446,7 @@ def reprocess(doc_ids: list[int], *, remote_ocr: bool = False) -> Literal["OK"]:
 
 def set_permissions(
     doc_ids: list[int],
-    set_permissions: dict,
+    set_permissions: PermissionsSpec,
     *,
     owner: User | None = None,
     merge: bool = False,

src/documents/consumer.py

@@ -38,7 +38,8 @@ from documents.models import StoragePath
 from documents.models import Tag
 from documents.models import WorkflowTrigger
 from documents.parsers import ParseError
-from documents.permissions import set_permissions_for_object
+from documents.permissions import PermissionsSpec
+from documents.permissions import set_permissions_for_objects
 from documents.plugins.base import AlwaysRunPluginMixin
 from documents.plugins.base import ConsumeTaskPlugin
 from documents.plugins.base import NoCleanupPluginMixin
@@ -948,7 +949,7 @@ class ConsumerPlugin(
             or self.metadata.change_users is not None
             or self.metadata.change_groups is not None
         ):
-            permissions = {
+            permissions: PermissionsSpec = {
                 "view": {
                     "users": self.metadata.view_users or [],
                     "groups": self.metadata.view_groups or [],
@@ -958,7 +959,7 @@ class ConsumerPlugin(
                     "groups": self.metadata.change_groups or [],
                 },
             }
-            set_permissions_for_object(permissions=permissions, object=document)
+            set_permissions_for_objects(permissions, Document, [document.pk])
 
         if self.metadata.custom_fields:
             for field in CustomField.objects.filter(

src/documents/permissions.py

@@ -1,4 +1,10 @@
+from collections.abc import Iterable
+from collections.abc import Mapping
 from typing import Any
+from typing import Final
+from typing import Literal
+from typing import TypeAlias
+from typing import TypedDict
 from typing import TypeVar
 
 from django.contrib.auth.models import Group
@@ -20,16 +26,29 @@ from django.db.models.functions import Coalesce
 from guardian.core import ObjectPermissionChecker
 from guardian.models import GroupObjectPermission
 from guardian.models import UserObjectPermission
-from guardian.shortcuts import assign_perm
 from guardian.shortcuts import get_objects_for_user
-from guardian.shortcuts import get_users_with_perms
-from guardian.shortcuts import remove_perm
 from rest_framework.permissions import BasePermission
 from rest_framework.permissions import DjangoObjectPermissions
 
 from documents.models import Document
 from documents.versioning import get_root_document
 
+PermissionAction = Literal["view", "change"]
+PERMISSION_ACTIONS: Final[tuple[PermissionAction, ...]] = ("view", "change")
+
+
+class PermissionGrantees(TypedDict, total=False):
+    """
+    The user and group ids to grant one permission action to. A missing key
+    leaves that kind of grant untouched.
+    """
+
+    users: Iterable[int]
+    groups: Iterable[int]
+
+
+PermissionsSpec: TypeAlias = Mapping[PermissionAction, PermissionGrantees]
+
 
 class PaperlessObjectPermissions(DjangoObjectPermissions):
     """
@@ -90,101 +109,10 @@ def has_system_status_permission(user: User | None) -> bool:
     )
 
 
-def get_groups_with_only_permission(obj, codename):
-    ctype = ContentType.objects.get_for_model(obj)
-    permission = Permission.objects.get(content_type=ctype, codename=codename)
-    group_object_perm_group_ids = (
-        GroupObjectPermission.objects.filter(
-            object_pk=obj.pk,
-            content_type=ctype,
-        )
-        .filter(permission=permission)
-        .values_list("group_id")
-    )
-    return Group.objects.filter(id__in=group_object_perm_group_ids).distinct()
-
-
-def set_permissions_for_object(
-    permissions: dict,
-    object,
-    *,
-    merge: bool = False,
-) -> None:
-    """
-    Set permissions for an object. The permissions are given as a mapping of actions
-    to a dict of user / group id lists, e.g.
-    {"view": {"users": [1], "groups": [2]}, "change": {"users": [], "groups": []}}.
-
-    If merge is True, the permissions are merged with the existing permissions and
-    no users or groups are removed. If False, the permissions are set to exactly
-    the given list of users and groups.
-    """
-
-    for action, entry in permissions.items():
-        permission = f"{action}_{object.__class__.__name__.lower()}"
-        if "users" in entry:
-            # users
-            users_to_add = User.objects.filter(id__in=entry["users"])
-            users_to_remove = (
-                get_users_with_perms(
-                    object,
-                    only_with_perms_in=[permission],
-                    with_group_users=False,
-                )
-                if not merge
-                else User.objects.none()
-            )
-            if users_to_add.exists() and users_to_remove.exists():
-                users_to_remove = users_to_remove.exclude(id__in=users_to_add)
-            if users_to_remove.exists():
-                for user in users_to_remove:
-                    remove_perm(permission, user, object)
-            if users_to_add.exists():
-                for user in users_to_add:
-                    assign_perm(permission, user, object)
-                    if action == "change":
-                        # change gives view too
-                        assign_perm(
-                            f"view_{object.__class__.__name__.lower()}",
-                            user,
-                            object,
-                        )
-        if "groups" in entry:
-            # groups
-            groups_to_add = Group.objects.filter(id__in=entry["groups"])
-            groups_to_remove = (
-                get_groups_with_only_permission(
-                    object,
-                    permission,
-                )
-                if not merge
-                else Group.objects.none()
-            )
-            if groups_to_add.exists() and groups_to_remove.exists():
-                groups_to_remove = groups_to_remove.exclude(id__in=groups_to_add)
-            if groups_to_remove.exists():
-                for group in groups_to_remove:
-                    remove_perm(permission, group, object)
-            if groups_to_add.exists():
-                for group in groups_to_add:
-                    assign_perm(permission, group, object)
-                    if action == "change":
-                        # change gives view too
-                        assign_perm(
-                            f"view_{object.__class__.__name__.lower()}",
-                            group,
-                            object,
-                        )
-
-
 def _resolve_permissions(codenames: set[str], ctype: ContentType) -> list[Permission]:
     """
-    Resolves `codenames` to Permission rows, raising like the single-object
+    Resolve ``codenames`` to Permission rows, raising for any that don't exist
-    assign_perm() this bulk path replaces does (via a `.get()` internally)
+    so a bad action name fails loudly instead of granting nothing.
-    if any codename doesn't exist. SetPermissionsSerializer rejects unknown
-    action names at the API, but a caller passing one directly would
-    otherwise get a plain `.filter()` that silently builds zero rows and
-    no-ops instead of reporting the bad input.
     """
     permission_objs = list(
         Permission.objects.filter(content_type=ctype, codename__in=codenames),
@@ -203,16 +131,13 @@ def _apply_bulk_permission_entry(
     perm_model: type[UserObjectPermission] | type[GroupObjectPermission],
     identity_model: type[User] | type[Group],
     identity_field: str,
-    ids: list[int],
+    ids: Iterable[int],
     codename: str,
     permission_objs: list[Permission],
     ctype: ContentType,
     object_pks: list[str],
     merge: bool,
 ) -> None:
-    # Only the ids are needed to build permission rows (via `<field>_id=`),
-    # so avoid fetching full User/Group rows for identities that may not
-    # even end up being granted anything new.
     add_ids = set(
         identity_model.objects.filter(id__in=ids).values_list("id", flat=True),
     )
@@ -250,45 +175,26 @@ def _apply_bulk_permission_entry(
         for pk in object_pks
         for identity_id in add_ids
     ]
-    # ignore_conflicts skips only rows that already exist as an exact
+    # ignore_conflicts skips grants that already exist (unique constraint).
-    # (identity, permission, object) match -- the same de-dup the
-    # underlying (user|group, permission, object_pk) unique constraint
-    # already enforces for the single-object assign_perm() this replaces,
-    # so it doesn't change what counts as "already granted". batch_size
-    # caps how many rows go into a single INSERT statement.
     perm_model.objects.bulk_create(rows, ignore_conflicts=True, batch_size=1000)
 
 
 def set_permissions_for_objects(
-    permissions: dict,
+    permissions: PermissionsSpec,
     model: type[Model],
     pks: QuerySet | list,
     *,
     merge: bool = False,
 ) -> None:
     """
-    Bulk equivalent of set_permissions_for_object: applies the same
+    Set the view/change grants for every object in ``pks``. With ``merge``,
-    permission changes to every object identified by `pks` at once.
+    the given users and groups are added; without it, each given action's
+    direct grants are replaced. Granting change also grants view, and an
+    action entry with neither key is left untouched.
 
-    Takes a model + pks (rather than model instances) deliberately -- the
+    guardian's bulk assign_perm is avoided because it skips the direct row
-    permission rows built below only ever need `pk`, `content_type`, and
+    for anyone who already has access through a group, so revoking the group
-    identity ids, so callers shouldn't have to fetch full rows (with every
+    later would silently remove access that was granted explicitly.
-    other field) just to hand them to this function.
-
-    Deliberately does not use guardian's queryset/list-aware assign_perm:
-    passing a list as the object routes to bulk_assign_perm, which skips
-    creating a direct permission row for anyone who already has the
-    permission via ANY group membership (it checks
-    ObjectPermissionChecker.has_perm, which is group-inheritance-aware) --
-    unlike the single-object assign_perm this replaces, which always
-    ensures a direct row via get_or_create regardless of group-derived
-    access. Losing that guarantee would mean a later revocation of the
-    group's grant silently strips access an admin explicitly asked to be
-    direct. Bulk-creating rows straight against the permission models
-    instead (see _apply_bulk_permission_entry) preserves the original
-    always-create-a-direct-row semantics while still batching every object
-    and every identity into one query per action, rather than one query per
-    (object, user) pair.
     """
     object_pks = [str(pk) for pk in pks]
     if not object_pks:  # pragma: no cover
@@ -297,12 +203,9 @@ def set_permissions_for_objects(
     model_name = model.__name__.lower()
     ctype = ContentType.objects.get_for_model(model)
 
-    # Every action is resolved up front, before anything is written, so an
+    # Resolve every action before writing, so a bad one can't leave the
-    # unrecognized action name (see _resolve_permissions) aborts the whole
+    # actions ahead of it applied.
-    # call instead of leaving the actions ahead of it already applied.
+    permissions_by_action: dict[PermissionAction, list[Permission]] = {}
-    # SetPermissionsSerializer rejects unknown actions at the API, so this
-    # guards any other caller.
-    permissions_by_action: dict[str, list[Permission]] = {}
     for action, entry in permissions.items():
         if "users" not in entry and "groups" not in entry:
             continue

src/documents/serialisers.py

@@ -39,6 +39,7 @@ from drf_spectacular.utils import extend_schema_field
 from drf_spectacular.utils import extend_schema_serializer
 from drf_writable_nested.serializers import NestedUpdateMixin
 from guardian.core import ObjectPermissionChecker
+from guardian.shortcuts import get_groups_with_perms
 from guardian.shortcuts import get_users_with_perms
 from guardian.utils import get_group_obj_perms_model
 from guardian.utils import get_user_obj_perms_model
@@ -78,12 +79,15 @@ from documents.models import WorkflowActionEmail
 from documents.models import WorkflowActionWebhook
 from documents.models import WorkflowTrigger
 from documents.parsers import is_mime_type_supported
+from documents.permissions import PERMISSION_ACTIONS
+from documents.permissions import PermissionAction
+from documents.permissions import PermissionGrantees
+from documents.permissions import PermissionsSpec
 from documents.permissions import get_document_count_filter_for_user
-from documents.permissions import get_groups_with_only_permission
 from documents.permissions import has_perms_owner_aware
 from documents.permissions import permitted_document_ids
 from documents.permissions import restrict_queryset_to_visible
-from documents.permissions import set_permissions_for_object
+from documents.permissions import set_permissions_for_objects
 from documents.regex import validate_regex_pattern
 from documents.templating.filepath import validate_filepath_template_and_render
 from documents.templating.utils import convert_format_str_to_template_format
@@ -211,9 +215,6 @@ class MatchingModelSerializer(serializers.ModelSerializer[Any]):
         return match
 
 
-PERMISSION_ACTIONS = ("view", "change")
-
-
 class SetPermissionsMixin:
     def _validate_user_ids(self, user_ids):
         users = User.objects.none()
@@ -235,8 +236,10 @@ class SetPermissionsMixin:
                 )
         return groups
 
-    def validate_set_permissions(self, set_permissions=None):
+    def validate_set_permissions(self, set_permissions=None) -> PermissionsSpec:
-        permissions_dict = {action: {} for action in PERMISSION_ACTIONS}
+        permissions_dict: dict[PermissionAction, PermissionGrantees] = {
+            action: {} for action in PERMISSION_ACTIONS
+        }
         if set_permissions is not None:
             for action in PERMISSION_ACTIONS:
                 if action in set_permissions:
@@ -244,18 +247,18 @@ class SetPermissionsMixin:
                         users = set_permissions[action]["users"]
                         permissions_dict[action]["users"] = self._validate_user_ids(
                             users,
-                        )
+                        ).values_list("id", flat=True)
                     if "groups" in set_permissions[action]:
                         groups = set_permissions[action]["groups"]
                         permissions_dict[action]["groups"] = self._validate_group_ids(
                             groups,
-                        )
+                        ).values_list("id", flat=True)
                 else:
                     del permissions_dict[action]
         return permissions_dict
 
-    def _set_permissions(self, permissions, object) -> None:
+    def _set_permissions(self, permissions: PermissionsSpec, object) -> None:
-        set_permissions_for_object(permissions, object)
+        set_permissions_for_objects(permissions, type(object), [object.pk])
 
 
 class SerializerWithPerms(serializers.Serializer[dict[str, Any]]):
@@ -334,9 +337,9 @@ class OwnedObjectSerializer(
             )
         else:  # groups
             return list(
-                get_groups_with_only_permission(
+                get_groups_with_perms(
                     obj,
-                    codename=f"{codename}_{obj.__class__.__name__.lower()}",
+                    only_with_perms_in=[f"{codename}_{obj.__class__.__name__.lower()}"],
                 ).values_list("id", flat=True),
             )
 
@@ -3086,7 +3089,7 @@ class BulkEditObjectsSerializer(SerializerWithPerms, SetPermissionsMixin):
             )
         return objects
 
-    def _validate_permissions(self, permissions) -> dict:
+    def _validate_permissions(self, permissions) -> PermissionsSpec:
         return self.validate_set_permissions(
             permissions,
         )

src/documents/tests/test_bulk_edit.py

@@ -23,6 +23,7 @@ from documents.models import Document
 from documents.models import DocumentType
 from documents.models import StoragePath
 from documents.models import Tag
+from documents.permissions import PermissionsSpec
 from documents.permissions import set_permissions_for_objects
 from paperless_testing.dirs import DirectoriesMixin
 from paperless_testing.factories import DocumentFactory
@@ -445,7 +446,7 @@ class TestBulkEdit(DirectoriesMixin, TestCase):
 
         grant_object(self.group1, self.doc1, "view_document")
 
-        permissions = {
+        permissions: PermissionsSpec = {
             "view": {
                 "users": [self.user1.id, self.user2.id],
                 "groups": [self.group2.id],
@@ -488,7 +489,7 @@ class TestBulkEdit(DirectoriesMixin, TestCase):
         grant_object(self.user1, self.doc1, "view_document")
         grant_object(self.group1, self.doc1, "view_document")
 
-        permissions = {
+        permissions: PermissionsSpec = {
             "view": {
                 "users": [self.user2.id],
                 "groups": [self.group2.id],
@@ -539,7 +540,7 @@ class TestBulkEdit(DirectoriesMixin, TestCase):
               batched call rather than one call per (document, identity)
               pair
         """
-        permissions = {
+        permissions: PermissionsSpec = {
             "view": {
                 "users": [self.user1.id, self.user2.id],
                 "groups": [self.group2.id],
@@ -646,7 +647,7 @@ class TestBulkEdit(DirectoriesMixin, TestCase):
         """
         with self.assertRaises(Permission.DoesNotExist):
             set_permissions_for_objects(
-                {"not_a_real_action": {"users": [self.user1.id], "groups": []}},
+                {"not_a_real_action": {"users": [self.user1.id], "groups": []}},  # type: ignore[bad-assignment]
                 Document,
                 [self.doc1.pk],
             )
@@ -674,7 +675,7 @@ class TestBulkEdit(DirectoriesMixin, TestCase):
             set_permissions_for_objects(
                 {
                     "view": {"users": [self.user1.id], "groups": []},
-                    "not_a_real_action": {"users": [self.user1.id], "groups": []},
+                    "not_a_real_action": {"users": [self.user1.id], "groups": []},  # type: ignore[bad-assignment]
                 },
                 Document,
                 [self.doc1.pk],

src/documents/tests/test_views.py

@@ -292,6 +292,33 @@ class TestViews(DirectoriesMixin, TestCase):
             else:
                 assert False, f"Unexpected tag found: {tag['name']}"
 
+    def test_retrieve_with_full_permissions(self) -> None:
+        """
+        GIVEN:
+            - A tag with view granted to two groups and change granted to only
+              one of them
+        WHEN:
+            - The single tag is requested with full permissions
+        THEN:
+            - Each action lists only the groups granted that action
+        """
+        view_only = Group.objects.create(name="view_only")
+        view_and_change = Group.objects.create(name="view_and_change")
+        tag = Tag.objects.create(name="invoice")
+        grant_object(view_only, tag, "view_tag")
+        grant_object(view_and_change, tag, "view_tag", "change_tag")
+        grant_global(self.user, "view_tag")
+
+        self.client.force_login(self.user)
+        response = self.client.get(f"/api/tags/{tag.pk}/?full_perms=true")
+
+        assert response.status_code == 200
+        permissions = response.json()["permissions"]
+        assert sorted(permissions["view"]["groups"]) == sorted(
+            [view_only.pk, view_and_change.pk],
+        )
+        assert permissions["change"]["groups"] == [view_and_change.pk]
+
     def test_list_no_n_plus_1_queries(self) -> None:
         """
         GIVEN:

src/documents/workflows/mutations.py

@@ -7,7 +7,8 @@ from documents.data_models import DocumentMetadataOverrides
 from documents.models import CustomFieldInstance
 from documents.models import Document
 from documents.models import WorkflowAction
-from documents.permissions import set_permissions_for_object
+from documents.permissions import PermissionsSpec
+from documents.permissions import set_permissions_for_objects
 from documents.templating.workflows import parse_w_workflow_placeholders
 
 logger = logging.getLogger("paperless.workflows.mutations")
@@ -73,7 +74,7 @@ def apply_assignment_to_document(
             action.has_assign_change_groups,
         ],
     ):
-        permissions = {
+        permissions: PermissionsSpec = {
             "view": {
                 "users": action.assign_view_users.values_list("id", flat=True),
                 "groups": action.assign_view_groups.values_list("id", flat=True),
@@ -83,9 +84,10 @@ def apply_assignment_to_document(
                 "groups": action.assign_change_groups.values_list("id", flat=True),
             },
         }
-        set_permissions_for_object(
+        set_permissions_for_objects(
-            permissions=permissions,
+            permissions,
-            object=document,
+            Document,
+            [document.pk],
             merge=True,
         )
 
@@ -243,13 +245,14 @@ def apply_removal_to_document(
         document.owner = None
 
     if action.remove_all_permissions:
-        permissions = {
+        permissions: PermissionsSpec = {
             "view": {"users": [], "groups": []},
             "change": {"users": [], "groups": []},
         }
-        set_permissions_for_object(
+        set_permissions_for_objects(
-            permissions=permissions,
+            permissions,
-            object=document,
+            Document,
+            [document.pk],
             merge=False,
         )