Squashed 'core/' content from commit 92ec910

git-subtree-dir: core
git-subtree-split: 92ec910a132e379a3a6e442a75bcb07cac0f0010

backend/app/core/database.py

@@ -0,0 +1,27 @@
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+from app.core.config import get_settings
+
+settings = get_settings()
+
+engine_kwargs = {"echo": settings.DEBUG}
+if not settings.is_sqlite:
+    engine_kwargs["pool_size"] = 20
+    engine_kwargs["max_overflow"] = 10
+
+engine = create_async_engine(settings.DATABASE_URL, **engine_kwargs)
+async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db():
+    async with async_session() as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise