From 407bedae0a529f8512b44522b319aa8434249dee Mon Sep 17 00:00:00 2001
From: Cr <631807682@qq.com>
Date: Wed, 26 Apr 2023 22:19:32 +0800
Subject: [PATCH] fix: nested joins alias (#6265)

---
 callbacks/query.go  |  7 ++++++-
 tests/joins_test.go | 16 ++++++++++++++--
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/callbacks/query.go b/callbacks/query.go
index 95db1f0a..e89dd199 100644
--- a/callbacks/query.go
+++ b/callbacks/query.go
@@ -234,7 +234,12 @@ func BuildQuerySQL(db *gorm.DB) {
 								fromClause.Joins = append(fromClause.Joins, genJoinClause(join.JoinType, parentTableName, rel))
 								specifiedRelationsName[nestedAlias] = nil
 							}
-							parentTableName = rel.Name
+
+							if parentTableName != clause.CurrentTable {
+								parentTableName = utils.NestedRelationName(parentTableName, rel.Name)
+							} else {
+								parentTableName = rel.Name
+							}
 						}
 					} else {
 						fromClause.Joins = append(fromClause.Joins, clause.Join{
diff --git a/tests/joins_test.go b/tests/joins_test.go
index e6715bbe..786fc37e 100644
--- a/tests/joins_test.go
+++ b/tests/joins_test.go
@@ -329,8 +329,19 @@ func TestJoinArgsWithDB(t *testing.T) {
 func TestNestedJoins(t *testing.T) {
 	users := []User{
 		{
-			Name:     "nested-joins-1",
-			Manager:  GetUser("nested-joins-manager-1", Config{Company: true, NamedPet: true}),
+			Name: "nested-joins-1",
+			Manager: &User{
+				Name: "nested-joins-manager-1",
+				Company: Company{
+					Name: "nested-joins-manager-company-1",
+				},
+				NamedPet: &Pet{
+					Name: "nested-joins-manager-namepet-1",
+					Toy: Toy{
+						Name: "nested-joins-manager-namepet-toy-1",
+					},
+				},
+			},
 			NamedPet: &Pet{Name: "nested-joins-namepet-1", Toy: Toy{Name: "nested-joins-namepet-toy-1"}},
 		},
 		{
@@ -352,6 +363,7 @@ func TestNestedJoins(t *testing.T) {
 		Joins("Manager").
 		Joins("Manager.Company").
 		Joins("Manager.NamedPet").
+		Joins("Manager.NamedPet.Toy").
 		Joins("NamedPet").
 		Joins("NamedPet.Toy").
 		Find(&users2, "users.id IN ?", userIDs).Error; err != nil {