fix 离线数据异常处理

Src/Dlhis.Canteen/Order/Services/Implements/OrderService.cs

@@ -678,14 +678,16 @@ public class OrderService : IOrderService
     /// <returns></returns>
     private async Task<bool> ToCheckAbleOfflineConsumeAsync(string thirdNo)
     {
-        var order = await _dbContext.Queryable<CanteenOrderEntity>()
+        var orders = await _dbContext.Queryable<CanteenOrderEntity>()
             .Where(x => x.ThirdNo == thirdNo)
             .OrderBy(x => x.CreateTime, OrderByType.Desc)
-            .SingleAsync();
+            .ToListAsync();
 
-        if (order == null)
+        if (orders.IsEmpty())
             return true;
 
+        var order = orders.FirstOrDefault();
+
         //存在在线order数据,但是状态未成功
         return !order.IsOffline && order.OrderStatus != CanteenOrderStatusEnumType.Success;
     }