From 0ce9ae2c6a4b9a779e4a70b6d3d2c6efb3d0d4a3 Mon Sep 17 00:00:00 2001
From: liutianqi <zixizixi@vip.qq.com>
Date: Wed, 27 Dec 2023 18:20:15 +0800
Subject: [PATCH] test: ExplainSQL using consecutive pairs of escaper in SQL
 string represents an escaper

---
 main_test.go | 41 ++++++++++++++++++++++++++++++++++++++++-
 models.go    |  4 ++--
 2 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/main_test.go b/main_test.go
index 60a388f7..83ad4582 100644
--- a/main_test.go
+++ b/main_test.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"reflect"
 	"testing"
 )
 
@@ -9,8 +10,10 @@ import (
 // TEST_DRIVERS: sqlite, mysql, postgres, sqlserver
 
 func TestGORM(t *testing.T) {
-	user := User{Name: "jinzhu"}
+	user := User{Name: `"jin'zhu"`} // string values contain single or double quotes
 
+	// INSERT INTO `users` (`created_at`,`updated_at`,`deleted_at`,`name`,`age`,`birthday`,`company_id`,`manager_id`,`active`)
+	// VALUES ("2023-12-27 17:58:17.329","2023-12-27 17:58:17.329",NULL,"""jin'zhu""",0,NULL,NULL,NULL,false) RETURNING `id`
 	DB.Create(&user)
 
 	var result User
@@ -18,3 +21,39 @@ func TestGORM(t *testing.T) {
 		t.Errorf("Failed, got error: %v", err)
 	}
 }
+
+func TestExplain(t *testing.T) {
+	type args struct {
+		prepareSql string
+		values     []interface{}
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantSQL string
+	}{
+		{"mysql", args{"SELECT ? AS QUOTES_STR", []interface{}{"'"}}, `SELECT '''' AS QUOTES_STR`},
+		{"postgres", args{"SELECT $1 AS QUOTES_STR", []interface{}{"'"}}, `SELECT '''' AS QUOTES_STR`},
+		{"sqlserver", args{"SELECT @p1 AS QUOTES_STR", []interface{}{"'"}}, `SELECT '''' AS QUOTES_STR`},
+		{"sqlite", args{"SELECT ? AS QUOTES_STR", []interface{}{`"`}}, `SELECT """" AS QUOTES_STR`},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if name := DB.Dialector.Name(); name != tt.name {
+				t.Logf("%s skip %s...", name, tt.name)
+				return
+			}
+			gotSQL := DB.Dialector.Explain(tt.args.prepareSql, tt.args.values...)
+			if reflect.DeepEqual(gotSQL, tt.wantSQL) {
+				var result string
+				if err := DB.Raw(gotSQL).Row().Scan(&result); err == nil {
+					t.Logf("result = `%s`", result)
+				} else {
+					t.Errorf("exec `%s` got error: %v", gotSQL, err)
+				}
+			} else {
+				t.Errorf("Explain gotDb = %v, want %v", gotSQL, tt.wantSQL)
+			}
+		})
+	}
+}
diff --git a/models.go b/models.go
index 692a6842..7a2e7c5d 100644
--- a/models.go
+++ b/models.go
@@ -13,8 +13,8 @@ import (
 // His pet also has one Toy (has one - polymorphic)
 type User struct {
 	gorm.Model
-	Name      string
-	Age       uint
+	Name      string `gorm:"comment:double quotation marks \"\" are included in the comment!"`
+	Age       uint   `gorm:"comment:single quotation marks '' are included in the comment"`
 	Birthday  *time.Time
 	Account   Account
 	Pets      []*Pet