提交

backend/app/data/sync_utils.py

@@ -68,6 +68,11 @@ def f_clean(v) -> float | None:
     return None if f != f else f  # NaN -> None
 
 
+def d8_iso(v) -> str | None:
+    """tushare YYYYMMDD -> 'YYYY-MM-DD'（字符串便于 JSON 缓存；pydantic 自动 coerce）。"""
+    return datetime.strptime(str(v), "%Y%m%d").date().isoformat() if v else None
+
+
 async def read_sync_state(session: AsyncSession, ts_code: str, kind: str) -> StockSyncState | None:
     return (await session.execute(
         select(StockSyncState).where(