update

backend/app/services/paper_trading_service.py

@@ -36,11 +36,28 @@ class PaperTradingService:
         logger.info(f"模拟交易服务初始化完成（自动平反向持仓: {'启用' if self.auto_close_opposite else '禁用'}，保本止损阈值: {self.breakeven_threshold}%）")
 
     def _ensure_table_exists(self):
-        """确保数据表已创建"""
+        """确保数据表已创建，并迁移新字段"""
         from app.models.paper_trading import PaperOrder
         from app.models.database import Base
+        from sqlalchemy import text
         Base.metadata.create_all(bind=db_service.engine)
 
+        # 检查并添加新字段 breakeven_triggered
+        db = db_service.get_session()
+        try:
+            # 尝试查询新字段，如果失败则添加
+            db.execute(text("SELECT breakeven_triggered FROM paper_orders LIMIT 1"))
+        except Exception:
+            try:
+                db.execute(text("ALTER TABLE paper_orders ADD COLUMN breakeven_triggered INTEGER DEFAULT 0"))
+                db.commit()
+                logger.info("数据库迁移: 添加 breakeven_triggered 字段")
+            except Exception as e:
+                logger.warning(f"添加 breakeven_triggered 字段失败（可能已存在）: {e}")
+                db.rollback()
+        finally:
+            db.close()
+
     def _load_active_orders(self):
         """从数据库加载活跃订单到内存"""
         db = db_service.get_session()