Fix BlackSheep cross-task database access

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()

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")