From 11c9772855faedb7f56f6756bd03f2511d2e0b6e Mon Sep 17 00:00:00 2001
From: Sanjay Santhanam <51058514+Sanjays2402@users.noreply.github.com>
Date: Wed, 15 Jul 2026 14:46:43 -0700
Subject: [PATCH] Fix BlackSheep cross-task database access

BlackSheep initializes the ORM in its lifespan task, but request tasks could not see that context because the global fallback was disabled. Enable the same fallback used by the other ASGI integrations and add a regression test for the startup configuration.
---
 tests/contrib/test_blacksheep.py        | 34 +++++++++++++++++++++++++
 tortoise/contrib/blacksheep/__init__.py |  8 +++++-
 2 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 tests/contrib/test_blacksheep.py

diff --git a/tests/contrib/test_blacksheep.py b/tests/contrib/test_blacksheep.py
new file mode 100644
index 000000000..2dab65fae
--- /dev/null
+++ b/tests/contrib/test_blacksheep.py
@@ -0,0 +1,34 @@
+from unittest.mock import AsyncMock, patch
+
+import pytest
+from blacksheep.server import Application
+
+from tortoise.contrib.blacksheep import register_tortoise
+
+
+@pytest.mark.asyncio
+async def test_register_tortoise_enables_global_fallback() -> None:
+    with (
+        patch("tortoise.contrib.blacksheep.Tortoise") as mocked_tortoise,
+        patch("tortoise.contrib.blacksheep.get_connections"),
+    ):
+        mocked_tortoise.init = AsyncMock()
+        mocked_tortoise.close_connections = AsyncMock()
+        app = Application()
+        register_tortoise(
+            app,
+            db_url="sqlite://:memory:",
+            modules={"models": ["__main__"]},
+        )
+
+        await app.start()
+        mocked_tortoise.init.assert_awaited_once_with(
+            config=None,
+            config_file=None,
+            db_url="sqlite://:memory:",
+            modules={"models": ["__main__"]},
+            _enable_global_fallback=True,
+        )
+
+        await app.stop()
+        mocked_tortoise.close_connections.assert_awaited_once()
diff --git a/tortoise/contrib/blacksheep/__init__.py b/tortoise/contrib/blacksheep/__init__.py
index 015ac1907..cda20acc3 100644
--- a/tortoise/contrib/blacksheep/__init__.py
+++ b/tortoise/contrib/blacksheep/__init__.py
@@ -89,7 +89,13 @@ def register_tortoise(
 
     @app.on_start
     async def init_orm(context) -> None:  # pylint: disable=W0612
-        await Tortoise.init(config=config, config_file=config_file, db_url=db_url, modules=modules)
+        await Tortoise.init(
+            config=config,
+            config_file=config_file,
+            db_url=db_url,
+            modules=modules,
+            _enable_global_fallback=True,
+        )
         logger.info("Tortoise-ORM started, %s, %s", get_connections()._get_storage(), Tortoise.apps)
         if generate_schemas:
             logger.info("Tortoise-ORM generating schema")