fix: bug

crawler/db_writer.py

@@ -4,6 +4,7 @@ import sqlite3
 import hashlib
 import os
 from datetime import datetime, timezone
+from typing import Optional
 
 from config import DB_PATH
 
@@ -73,14 +74,29 @@ def touch_situation_updated_at(conn: sqlite3.Connection) -> None:
     conn.commit()
 
 
-def write_updates(updates: list[dict]) -> int:
+def touch_situation_updated_at_path(db_path: Optional[str] = None) -> bool:
+    """仅更新 situation.updated_at 为当前时间（每次爬虫运行都调用，便于前端显示「最后抓取时间」）。返回是否成功。"""
+    path = db_path or DB_PATH
+    if not os.path.exists(path):
+        return False
+    conn = sqlite3.connect(path, timeout=10)
+    try:
+        touch_situation_updated_at(conn)
+        return True
+    finally:
+        conn.close()
+
+
+def write_updates(updates: list[dict], db_path: Optional[str] = None) -> int:
     """
     updates: [{"title","summary","url","published","category","severity"}, ...]
+    db_path: 与 pipeline 一致，缺省用 config.DB_PATH
     返回新增条数。
     """
-    if not os.path.exists(DB_PATH):
+    path = db_path or DB_PATH
+    if not os.path.exists(path):
         return 0
-    conn = sqlite3.connect(DB_PATH, timeout=10)
+    conn = sqlite3.connect(path, timeout=10)
     try:
         count = 0
         for u in updates: