From 5163bb910730ac81da213fcf5770fc53f4058aed Mon Sep 17 00:00:00 2001
From: a631807682 <631807682@qq.com>
Date: Fri, 27 May 2022 15:42:55 +0800
Subject: [PATCH] fix: dup filed in inconsistent schema and database

---
 scan.go            | 16 +++++++++++-----
 tests/scan_test.go | 17 +++++++++++++++++
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/scan.go b/scan.go
index 21ca51a2..3a2d139d 100644
--- a/scan.go
+++ b/scan.go
@@ -193,15 +193,21 @@ func Scan(rows Rows, db *DB, mode ScanMode) {
 
 			// Not Pluck
 			if sch != nil {
+				schFiledCount := len(sch.Fields)
 				for idx, column := range columns {
 					if field := sch.LookUpField(column); field != nil && field.Readable {
 						if curIndex, ok := selectedColumnsMap[column]; ok {
 							fields[idx] = field // handle duplicate fields
-							for fieldIndex, selectField := range sch.Fields[curIndex+1:] {
-								if selectField.DBName == column && selectField.Readable {
-									selectedColumnsMap[column] = curIndex + fieldIndex + 1
-									fields[idx] = selectField
-									break
+							offset := curIndex + 1
+							// handle sch inconsistent with database
+							// like Raw(`...`).Scan
+							if schFiledCount > offset {
+								for fieldIndex, selectField := range sch.Fields[offset:] {
+									if selectField.DBName == column && selectField.Readable {
+										selectedColumnsMap[column] = curIndex + fieldIndex + 1
+										fields[idx] = selectField
+										break
+									}
 								}
 							}
 						} else {
diff --git a/tests/scan_test.go b/tests/scan_test.go
index 1824c088..b7bf9a5e 100644
--- a/tests/scan_test.go
+++ b/tests/scan_test.go
@@ -221,4 +221,21 @@ func TestScanToEmbedded(t *testing.T) {
 		t.Errorf("Failed to run join query, got error: %v", err)
 	}
 	AssertEqual(t, person1, personDupField)
+
+	user := User{
+		Name: "TestScanToEmbedded_1",
+		Manager: &User{Name: "TestScanToEmbedded_1_m1",
+			Manager: &User{Name: "TestScanToEmbedded_1_m1_m1"},
+		},
+	}
+	DB.Create(&user)
+
+	type UserScan struct {
+		ID        uint
+		Name      string
+		ManagerID *uint
+	}
+	var user2 UserScan
+	err := DB.Raw("SELECT * FROM users INNER JOIN users Manager ON users.manager_id = Manager.id WHERE users.id = ?", user.ID).Scan(&user2).Error
+	AssertEqual(t, err, nil)
 }