From 4f4df30a37310f969b251f378232f773e2af488d Mon Sep 17 00:00:00 2001
From: aaron <>
Date: Thu, 19 Feb 2026 21:48:23 +0800
Subject: [PATCH] u

---
 .../app/services/signal_database_service.py   | 30 ++++++++-----------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/backend/app/services/signal_database_service.py b/backend/app/services/signal_database_service.py
index e2423f2..ae430fe 100644
--- a/backend/app/services/signal_database_service.py
+++ b/backend/app/services/signal_database_service.py
@@ -7,7 +7,7 @@ from sqlalchemy.orm import Session
 from sqlalchemy import desc, and_, or_
 
 from app.models.signal import TradingSignal
-from app.models.database import SessionLocal, engine, Base
+from app.services.db_service import DatabaseService
 from app.utils.logger import logger
 
 
@@ -16,28 +16,21 @@ class SignalDatabaseService:
 
     def __init__(self):
         """初始化服务"""
+        self.db_service = DatabaseService()
         self._ensure_tables()
 
     def _ensure_tables(self):
         """确保表已创建"""
         try:
+            from app.models.database import Base, engine
             Base.metadata.create_all(bind=engine)
             logger.info("交易信号表已创建")
         except Exception as e:
             logger.error(f"创建交易信号表失败: {e}")
 
-    def _get_db(self) -> Session:
-        """获取数据库会话"""
-        db = SessionLocal()
-        try:
-            return db
-        except Exception as e:
-            logger.error(f"获取数据库会话失败: {e}")
-            raise
-
     def add_signal(self, signal_data: Dict[str, Any]) -> Optional[TradingSignal]:
         """添加信号到数据库"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             # 创建信号对象
             signal = TradingSignal(
@@ -85,7 +78,7 @@ class SignalDatabaseService:
         days: int = 7
     ) -> List[Dict[str, Any]]:
         """获取加密货币信号"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -114,7 +107,7 @@ class SignalDatabaseService:
         days: int = 7
     ) -> List[Dict[str, Any]]:
         """获取美股信号"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -138,7 +131,7 @@ class SignalDatabaseService:
 
     def get_all_signals(self, limit: int = 100, days: int = 7) -> Dict[str, List[Dict[str, Any]]]:
         """获取所有信号"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -169,7 +162,7 @@ class SignalDatabaseService:
 
     def get_latest_signals(self, limit: int = 20, days: int = 7) -> List[Dict[str, Any]]:
         """获取最新信号（混合）"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -187,7 +180,7 @@ class SignalDatabaseService:
 
     def get_signal_stats(self, days: int = 7) -> Dict[str, Any]:
         """获取信号统计"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -241,7 +234,7 @@ class SignalDatabaseService:
 
     def get_latest_signal(self, signal_type: str, symbol: str) -> Optional[Dict[str, Any]]:
         """获取指定交易对的最新信号"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             signal = db.query(TradingSignal).filter(
                 TradingSignal.signal_type == signal_type,
@@ -260,7 +253,7 @@ class SignalDatabaseService:
 
     def clear_old_signals(self, days: int = 30):
         """清理旧信号"""
-        db = self._get_db()
+        db = self.db_service.get_session()
         try:
             cutoff_time = datetime.utcnow() - timedelta(days=days)
 
@@ -288,3 +281,4 @@ def get_signal_db_service() -> SignalDatabaseService:
     if _signal_db_service is None:
         _signal_db_service = SignalDatabaseService()
     return _signal_db_service
+