From 232421f40b84590e6d6fdecab4e43274aac37add Mon Sep 17 00:00:00 2001
From: Timothy Jaeryang Baek <tim@openwebui.com>
Date: Wed, 17 Jun 2026 00:25:35 +0200
Subject: [PATCH] refac

---
 backend/open_webui/models/chats.py    | 15 +++++++++++++++
 backend/open_webui/models/folders.py  | 19 +++++++++++++++++++
 backend/open_webui/routers/folders.py |  3 ++-
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/backend/open_webui/models/chats.py b/backend/open_webui/models/chats.py
index 13eebf46b1..a04eab8ad8 100644
--- a/backend/open_webui/models/chats.py
+++ b/backend/open_webui/models/chats.py
@@ -1571,6 +1571,21 @@ class ChatTable:
             log.info(f"Count of chats for folder '{folder_id}': {count}")
             return count
 
+    async def count_chats_by_folder_ids_and_user_id(
+        self, folder_ids: list[str], user_id: str, db: AsyncSession | None = None
+    ) -> int:
+        if not folder_ids:
+            return 0
+
+        async with get_async_db_context(db) as session:
+            result = await session.execute(
+                select(func.count(Chat.id)).filter(Chat.user_id == user_id, Chat.folder_id.in_(folder_ids))
+            )
+            count = result.scalar()
+
+            log.info(f"Count of chats for folders '{folder_ids}': {count}")
+            return count
+
     async def delete_tag_by_id_and_user_id_and_tag_name(
         self, id: str, user_id: str, tag_name: str, db: AsyncSession | None = None
     ) -> bool:
diff --git a/backend/open_webui/models/folders.py b/backend/open_webui/models/folders.py
index d4eb52e337..18f60a43f7 100644
--- a/backend/open_webui/models/folders.py
+++ b/backend/open_webui/models/folders.py
@@ -252,6 +252,25 @@ class FolderTable:
             result = await db.execute(select(Folder).filter_by(parent_id=parent_id, user_id=user_id))
             return [FolderModel.model_validate(folder) for folder in result.scalars().all()]
 
+    async def get_folder_ids_by_id_and_user_id_in_subtree(
+        self, id: str, user_id: str, db: Optional[AsyncSession] = None
+    ) -> list[str]:
+        async with get_async_db_context(db) as db:
+            result = await db.execute(select(Folder).filter_by(id=id, user_id=user_id))
+            folder = result.scalars().first()
+            if not folder:
+                return []
+
+            folder_ids = [folder.id]
+            folders = [FolderModel.model_validate(folder)]
+            while folders:
+                current_folder = folders.pop()
+                children = await self.get_folders_by_parent_id_and_user_id(current_folder.id, user_id, db=db)
+                folder_ids.extend(child.id for child in children)
+                folders.extend(children)
+
+            return folder_ids
+
     async def update_folder_parent_id_by_id_and_user_id(
         self,
         id: str,
diff --git a/backend/open_webui/routers/folders.py b/backend/open_webui/routers/folders.py
index 0adb068772..a53bbccd57 100644
--- a/backend/open_webui/routers/folders.py
+++ b/backend/open_webui/routers/folders.py
@@ -519,7 +519,8 @@ async def delete_folder_by_id(
 
     folder_owner_id = folder.user_id
 
-    if await Chats.count_chats_by_folder_id_and_user_id(id, folder_owner_id, db=db):
+    folder_ids = await Folders.get_folder_ids_by_id_and_user_id_in_subtree(id, folder_owner_id, db=db)
+    if await Chats.count_chats_by_folder_ids_and_user_id(folder_ids, folder_owner_id, db=db):
         chat_delete_permission = await has_permission(
             user.id, 'chat.delete', request.app.state.config.USER_PERMISSIONS, db=db
         )