first commit

backend/app/database.py

@@ -0,0 +1,27 @@
+from collections.abc import AsyncIterator
+
+from pymongo import AsyncMongoClient
+from sqlalchemy.ext.asyncio import (
+    AsyncSession,
+    async_sessionmaker,
+    create_async_engine,
+)
+
+from app.config import get_settings
+
+settings = get_settings()
+
+engine = create_async_engine(settings.database_url, pool_pre_ping=True)
+SessionFactory = async_sessionmaker(engine, expire_on_commit=False)
+
+mongo_client: AsyncMongoClient = AsyncMongoClient(settings.mongo_url)
+mongo_db = mongo_client[settings.mongo_database]
+
+
+async def get_postgres_session() -> AsyncIterator[AsyncSession]:
+    async with SessionFactory() as session:
+        yield session
+
+
+def get_mongo_database():
+    return mongo_db