From cd7b484fc2c6f7396f97735f8b21effe3df0a5de Mon Sep 17 00:00:00 2001
From: Gordon <1432970085@qq.com>
Date: Sat, 22 Oct 2022 17:53:15 +0800
Subject: [PATCH] message pull

---
 pkg/common/db/mongoModel.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/common/db/mongoModel.go b/pkg/common/db/mongoModel.go
index 1e4d7b01d..8695bca35 100644
--- a/pkg/common/db/mongoModel.go
+++ b/pkg/common/db/mongoModel.go
@@ -370,6 +370,9 @@ func (d *DataBases) GetMsgBySeqListMongo2(uid string, seqList []uint32, operatio
 			}
 		}
 	}
+	if len(hasSeqList) == 0 {
+		return nil, errors.New("pull message is null")
+	}
 	if len(hasSeqList) != len(seqList) {
 		var diff []uint32
 		diff = utils.Difference(hasSeqList, seqList)