diff --git a/buyer-api/src/main/java/cn/lili/controller/member/MemberSignBuyerController.java b/buyer-api/src/main/java/cn/lili/controller/member/MemberSignBuyerController.java
index 758f60cf..c645fd21 100644
--- a/buyer-api/src/main/java/cn/lili/controller/member/MemberSignBuyerController.java
+++ b/buyer-api/src/main/java/cn/lili/controller/member/MemberSignBuyerController.java
@@ -1,5 +1,6 @@
 package cn.lili.controller.member;
 
+import cn.lili.cache.limit.annotation.LimitPoint;
 import cn.lili.common.aop.annotation.PreventDuplicateSubmissions;
 import cn.lili.common.enums.ResultUtil;
 import cn.lili.common.vo.ResultMessage;
@@ -32,6 +33,7 @@ public class MemberSignBuyerController {
     @PreventDuplicateSubmissions
     @PostMapping
     @ApiOperation(value = "会员签到")
+    @LimitPoint(limit = 1)
     public ResultMessage<Boolean> memberSign() {
         return ResultUtil.data(memberSignService.memberSign());
     }
diff --git a/framework/src/main/java/cn/lili/mybatis/mybatisplus/MyMetaObjectHandler.java b/framework/src/main/java/cn/lili/mybatis/mybatisplus/MyMetaObjectHandler.java
index 691daacc..5451c8e1 100644
--- a/framework/src/main/java/cn/lili/mybatis/mybatisplus/MyMetaObjectHandler.java
+++ b/framework/src/main/java/cn/lili/mybatis/mybatisplus/MyMetaObjectHandler.java
@@ -22,11 +22,15 @@ public class MyMetaObjectHandler implements MetaObjectHandler {
         AuthUser authUser = UserContext.getCurrentUser();
         if (authUser != null) {
             this.setFieldValByName("createBy", authUser.getUsername(), metaObject);
-        }else{
+        } else {
 
             this.setFieldValByName("createBy", "SYSTEM", metaObject);
         }
-        this.setFieldValByName("createTime", new Date(), metaObject);
+        //有创建时间字段，切字段值为空
+        if (metaObject.hasGetter("createTime")
+                && metaObject.getValue("createTime") == null) {
+            this.setFieldValByName("createTime", new Date(), metaObject);
+        }
         //有值，则写入
         if (metaObject.hasGetter("deleteFlag")) {
             this.setFieldValByName("deleteFlag", false, metaObject);