From 1aca53985b43403118c2ccef13a5be939efba2c3 Mon Sep 17 00:00:00 2001
From: Louis Brauer <louis.brauer@pixeltex.com>
Date: Thu, 7 Jun 2018 00:54:24 +0200
Subject: [PATCH] Adding json type for mssql dialect, similar to postgres.Jsonb

---
 dialects/mssql/mssql.go | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/dialects/mssql/mssql.go b/dialects/mssql/mssql.go
index a8d3c45a..b03f8c22 100644
--- a/dialects/mssql/mssql.go
+++ b/dialects/mssql/mssql.go
@@ -1,6 +1,9 @@
 package mssql
 
 import (
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -201,3 +204,25 @@ func currentDatabaseAndTable(dialect gorm.Dialect, tableName string) (string, st
 	}
 	return dialect.CurrentDatabase(), tableName
 }
+
+type Json struct {
+	json.RawMessage
+}
+
+// Value get value of Jsonb
+func (j Json) Value() (driver.Value, error) {
+	if len(j.RawMessage) == 0 {
+		return nil, nil
+	}
+	return j.MarshalJSON()
+}
+
+// Scan scan value into Json
+func (j *Json) Scan(value interface{}) error {
+	str, ok := value.(string)
+	if !ok {
+		return errors.New(fmt.Sprint("Failed to unmarshal JSONB value (strcast):", value))
+	}
+	bytes := []byte(str)
+	return json.Unmarshal(bytes, j)
+}