crud api

backend_fastapi/database.py

@@ -0,0 +1,29 @@
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase
+import os
+from dotenv import load_dotenv
+load_dotenv()
+class Model(DeclarativeBase):
+    pass
+
+async_engine = create_async_engine(
+    os.getenv("SQL_URL"),
+    connect_args={"check_same_thread": False}
+    )
+
+
+async_session = async_sessionmaker(
+        async_engine,
+        autoflush=True,
+        autocommit=False, 
+        expire_on_commit =False
+    )
+
+
+async def connect() -> None:
+    async with async_engine.begin() as conn:
+        await conn.run_sync(Model.metadata.create_all, checkfirst=True)
+
+async def disconnect() -> None:
+    if async_engine:
+        await async_engine.dispose()