From 7ec9d5c0a2056ef544e65ff00e1c8a70de1732ea Mon Sep 17 00:00:00 2001
From: donghao <donghao@gaodun.com>
Date: Sun, 27 Mar 2022 18:38:42 +0800
Subject: [PATCH] =?UTF-8?q?MySQL=20=E5=88=97=E5=B1=9E=E6=80=A7=E4=B8=BA=20?=
 =?UTF-8?q?JSON=20=E6=97=B6=EF=BC=8C=E8=8B=A5=E6=AD=A4=E5=88=97=E6=9C=AA?=
 =?UTF-8?q?=E8=AE=BE=E5=80=BC=EF=BC=8C=E5=88=99=E8=B7=B3=E8=BF=87=E6=8F=92?=
 =?UTF-8?q?=E5=85=A5=EF=BC=8C=E9=81=BF=E5=85=8D=E5=BC=95=E8=B5=B7=E9=94=99?=
 =?UTF-8?q?=E8=AF=AF=EF=BC=9AInvalid=20JSON=20text:=20"The=20document=20is?=
 =?UTF-8?q?=20empty."=20at=20position=200=20in=20value?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 dialects/mysql.go | 1 +
 session_insert.go | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/dialects/mysql.go b/dialects/mysql.go
index 1fad3fee..58499ea6 100644
--- a/dialects/mysql.go
+++ b/dialects/mysql.go
@@ -304,6 +304,7 @@ func (db *mysql) SQLType(c *schemas.Column) string {
 		c.Length = 40
 	case schemas.Json:
 		res = schemas.Text
+		c.IsJSON = true
 	case schemas.UnsignedInt:
 		res = schemas.Int
 		isUnsigned = true
diff --git a/session_insert.go b/session_insert.go
index fc025613..30b897e5 100644
--- a/session_insert.go
+++ b/session_insert.go
@@ -501,6 +501,10 @@ func (session *Session) genInsertColumns(bean interface{}) ([]string, []interfac
 			continue
 		}
 
+		if col.IsJSON && fieldValue.String() == "" {
+			continue
+		}
+
 		// !evalphobia! 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) {