Initial commit: svg backend

backend/app/db/base.py

@@ -0,0 +1,5 @@
+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase):
+    pass

backend/app/db/session.py

@@ -0,0 +1,22 @@
+from sqlalchemy import text
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.core.config import settings
+
+engine = create_async_engine(
+    settings.database_url,
+    pool_pre_ping=True,
+)
+
+AsyncSessionLocal = async_sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+)
+
+
+async def db_ping() -> dict:
+    async with AsyncSessionLocal() as session:
+        result = await session.execute(text("select 1 as ok"))
+        row = result.mappings().first()
+        return {"ok": row["ok"] if row else None}