diff --git a/BBWYB.Server.Model/Db/PurchaseScheme/PurchaseScheme.cs b/BBWYB.Server.Model/Db/PurchaseScheme/PurchaseScheme.cs
index b9679e5..6e303e4 100644
--- a/BBWYB.Server.Model/Db/PurchaseScheme/PurchaseScheme.cs
+++ b/BBWYB.Server.Model/Db/PurchaseScheme/PurchaseScheme.cs
@@ -50,6 +50,7 @@ namespace BBWYB.Server.Model
         /// <summary>
         /// 最后采购时间
         /// </summary>
+        [Column(DbType = "datetime")]
         public DateTime? LastPurchaseTime { get; set; }
 
         /// <summary>
@@ -102,6 +103,7 @@ namespace BBWYB.Server.Model
         /// <summary>
         /// 最近议价日期
         /// </summary>
+        [Column(DbType = "datetime")]
         public DateTime? LastBargainingTime { get; set; }
     }
 
diff --git a/BBWYB.Server.Model/Db/PurchaseScheme/Purchaseschemeproductsku.cs b/BBWYB.Server.Model/Db/PurchaseScheme/Purchaseschemeproductsku.cs
index 001a729..f9347f0 100644
--- a/BBWYB.Server.Model/Db/PurchaseScheme/Purchaseschemeproductsku.cs
+++ b/BBWYB.Server.Model/Db/PurchaseScheme/Purchaseschemeproductsku.cs
@@ -60,6 +60,7 @@ namespace BBWYB.Server.Model.Db
         /// <summary>
         /// 最近议价日期
         /// </summary>
+        [Column(DbType = "datetime", IsNullable = true)]
         public DateTime? LastBargainingTime { get; set; }
 
         /// <summary>