🐛(backend) allow creator to delete subpages

An editor who created a subpages should be allowed to delete it.
We change the abilities to be coherent between the creation and the
deletion.
Fixes #1193

Author: lunika

CHANGELOG.md

@@ -29,6 +29,7 @@ and this project adheres to
 
 - 🐛(makefile) Windows compatibility fix for Docker volume mounting #1264
 - 🐛(minio) fix user permission error with Minio and Windows #1264
+- 🐛(backend) allow editor to delete subpages #1296
 
 ## [3.5.0] - 2025-07-31
 

src/backend/core/api/viewsets.py

@@ -360,7 +360,7 @@ class DocumentViewSet(
     permission_classes = [
         permissions.DocumentPermission,
     ]
-    queryset = models.Document.objects.all()
+    queryset = models.Document.objects.select_related("creator").all()
     serializer_class = serializers.DocumentSerializer
     ai_translate_serializer_class = serializers.AITranslateSerializer
     children_serializer_class = serializers.ListDocumentSerializer
@@ -787,7 +787,11 @@ def children(self, request, *args, **kwargs):
             )
 
         # GET: List children
-        queryset = document.get_children().filter(ancestors_deleted_at__isnull=True)
+        queryset = (
+            document.get_children()
+            .select_related("creator")
+            .filter(ancestors_deleted_at__isnull=True)
+        )
         queryset = self.filter_queryset(queryset)
 
         filterset = DocumentFilter(request.GET, queryset=queryset)
@@ -841,7 +845,9 @@ def tree(self, request, pk, *args, **kwargs):
         user = self.request.user
 
         try:
-            current_document = self.queryset.only("depth", "path").get(pk=pk)
+            current_document = (
+                self.queryset.select_related(None).only("depth", "path").get(pk=pk)
+            )
         except models.Document.DoesNotExist as excpt:
             raise drf.exceptions.NotFound() from excpt
 
@@ -881,7 +887,12 @@ def tree(self, request, pk, *args, **kwargs):
 
         children = self.queryset.filter(children_clause, deleted_at__isnull=True)
 
-        queryset = ancestors.filter(depth__gte=highest_readable.depth) | children
+        queryset = (
+            ancestors.select_related("creator").filter(
+                depth__gte=highest_readable.depth
+            )
+            | children
+        )
         queryset = queryset.order_by("path")
         queryset = queryset.annotate_user_roles(user)
         queryset = queryset.annotate_is_favorite(user)
@@ -1283,7 +1294,8 @@ def media_auth(self, request, *args, **kwargs):
         )
 
         attachments_documents = (
-            self.queryset.filter(attachments__contains=[key])
+            self.queryset.select_related(None)
+            .filter(attachments__contains=[key])
             .only("path")
             .order_by("path")
         )

src/backend/core/models.py

@@ -762,6 +762,12 @@ def get_abilities(self, user):
         can_update = (
             is_owner_or_admin or role == RoleChoices.EDITOR
         ) and not is_deleted
+        can_create_children = can_update and user.is_authenticated
+        can_destroy = (
+            is_owner
+            if self.is_root()
+            else (is_owner_or_admin or (user.is_authenticated and self.creator == user))
+        )
 
         ai_allow_reach_from = settings.AI_ALLOW_REACH_FROM
         ai_access = any(
@@ -784,11 +790,11 @@ def get_abilities(self, user):
             "media_check": can_get,
             "can_edit": can_update,
             "children_list": can_get,
-            "children_create": can_update and user.is_authenticated,
+            "children_create": can_create_children,
             "collaboration_auth": can_get,
             "cors_proxy": can_get,
             "descendants": can_get,
-            "destroy": is_owner,
+            "destroy": can_destroy,
             "duplicate": can_get and user.is_authenticated,
             "favorite": can_get and user.is_authenticated,
             "link_configuration": is_owner_or_admin,

src/backend/core/tests/documents/test_api_documents_retrieve.py

@@ -494,7 +494,7 @@ def test_api_documents_retrieve_authenticated_related_parent():
             "collaboration_auth": True,
             "descendants": True,
             "cors_proxy": True,
-            "destroy": access.role == "owner",
+            "destroy": access.role != "reader",
             "duplicate": True,
             "favorite": True,
             "invite_owner": access.role == "owner",

src/backend/core/tests/test_models_documents.py

@@ -593,6 +593,86 @@ def test_models_documents_get_abilities_preset_role(django_assert_num_queries):
     }
 
 
+@pytest.mark.parametrize(
+    "is_authenticated, is_creator,role,link_reach,link_role,can_destroy",
+    [
+        (True, False, "owner", "restricted", "editor", True),
+        (True, True, "owner", "restricted", "editor", True),
+        (True, False, "owner", "restricted", "reader", True),
+        (True, True, "owner", "restricted", "reader", True),
+        (True, False, "owner", "authenticated", "editor", True),
+        (True, True, "owner", "authenticated", "editor", True),
+        (True, False, "owner", "authenticated", "reader", True),
+        (True, True, "owner", "authenticated", "reader", True),
+        (True, False, "owner", "public", "editor", True),
+        (True, True, "owner", "public", "editor", True),
+        (True, False, "owner", "public", "reader", True),
+        (True, True, "owner", "public", "reader", True),
+        (True, False, "administrator", "restricted", "editor", True),
+        (True, True, "administrator", "restricted", "editor", True),
+        (True, False, "administrator", "restricted", "reader", True),
+        (True, True, "administrator", "restricted", "reader", True),
+        (True, False, "administrator", "authenticated", "editor", True),
+        (True, True, "administrator", "authenticated", "editor", True),
+        (True, False, "administrator", "authenticated", "reader", True),
+        (True, True, "administrator", "authenticated", "reader", True),
+        (True, False, "administrator", "public", "editor", True),
+        (True, True, "administrator", "public", "editor", True),
+        (True, False, "administrator", "public", "reader", True),
+        (True, True, "administrator", "public", "reader", True),
+        (True, False, "editor", "restricted", "editor", False),
+        (True, True, "editor", "restricted", "editor", True),
+        (True, False, "editor", "restricted", "reader", False),
+        (True, True, "editor", "restricted", "reader", True),
+        (True, False, "editor", "authenticated", "editor", False),
+        (True, True, "editor", "authenticated", "editor", True),
+        (True, False, "editor", "authenticated", "reader", False),
+        (True, True, "editor", "authenticated", "reader", True),
+        (True, False, "editor", "public", "editor", False),
+        (True, True, "editor", "public", "editor", True),
+        (True, False, "editor", "public", "reader", False),
+        (True, True, "editor", "public", "reader", True),
+        (True, False, "reader", "restricted", "editor", False),
+        (True, False, "reader", "restricted", "reader", False),
+        (True, False, "reader", "authenticated", "editor", False),
+        (True, True, "reader", "authenticated", "editor", True),
+        (True, False, "reader", "authenticated", "reader", False),
+        (True, False, "reader", "public", "editor", False),
+        (True, True, "reader", "public", "editor", True),
+        (True, False, "reader", "public", "reader", False),
+        (False, False, None, "restricted", "editor", False),
+        (False, False, None, "restricted", "reader", False),
+        (False, False, None, "authenticated", "editor", False),
+        (False, False, None, "authenticated", "reader", False),
+        (False, False, None, "public", "editor", False),
+        (False, False, None, "public", "reader", False),
+    ],
+)
+# pylint: disable=too-many-arguments, too-many-positional-arguments
+def test_models_documents_get_abilities_children_destroy(  # noqa: PLR0913
+    is_authenticated,
+    is_creator,
+    role,
+    link_reach,
+    link_role,
+    can_destroy,
+):
+    """For a sub document, if a user can create children, he can destroy it."""
+    user = factories.UserFactory() if is_authenticated else AnonymousUser()
+    parent = factories.DocumentFactory(link_reach=link_reach, link_role=link_role)
+    document = factories.DocumentFactory(
+        link_reach=link_reach,
+        link_role=link_role,
+        parent=parent,
+        creator=user if is_creator else None,
+    )
+    if is_authenticated:
+        factories.UserDocumentAccessFactory(document=parent, user=user, role=role)
+
+    abilities = document.get_abilities(user)
+    assert abilities["destroy"] is can_destroy
+
+
 @override_settings(AI_ALLOW_REACH_FROM="public")
 @pytest.mark.parametrize(
     "is_authenticated,reach",