From d3558f1e777fe222fbe83a3084d6bd244f9d6e84 Mon Sep 17 00:00:00 2001
From: satorunooshie <satorunooshie@noreply.gitea.io>
Date: Mon, 6 Dec 2021 01:00:04 +0800
Subject: [PATCH] Fix insertMultipleStruct to insert null value under certain
 circumstances

---
 session_insert.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/session_insert.go b/session_insert.go
index 43a4118b..9c144b93 100644
--- a/session_insert.go
+++ b/session_insert.go
@@ -143,6 +143,13 @@ func (session *Session) insertMultipleStruct(rowsSlicePtr interface{}) (int64, e
 			if len(session.statement.ColumnMap) > 0 && !session.statement.ColumnMap.Contain(col.Name) {
 				continue
 			}
+			// !satorunooshie! set fieldValue as nil when column is nullable and zero-value
+			if _, ok := getFlagForColumn(session.statement.NullableMap, col); ok {
+				if col.Nullable && utils.IsValueZero(fieldValue) {
+					var nilValue *int
+					fieldValue = reflect.ValueOf(nilValue)
+				}
+			}
 			if (col.IsCreated || col.IsUpdated) && session.statement.UseAutoTime {
 				val, t, err := session.engine.nowTime(col)
 				if err != nil {