From e85b73e5a5d9de181c12ce4d4ed14da79119cf8a Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Fri, 19 Mar 2021 13:44:25 +0800
Subject: [PATCH] Fix nested Scopes, close #4196

---
 callbacks.go | 10 ++++++----
 migrator.go  | 10 ++++++----
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/callbacks.go b/callbacks.go
index 3e6723a1..315eea17 100644
--- a/callbacks.go
+++ b/callbacks.go
@@ -109,10 +109,12 @@ func (p *processor) Execute(db *DB) {
 	}
 
 	// call scopes
-	scopes := stmt.scopes
-	stmt.scopes = nil
-	for _, scope := range scopes {
-		db = scope(db)
+	for len(stmt.scopes) > 0 {
+		scopes := stmt.scopes
+		stmt.scopes = nil
+		for _, scope := range scopes {
+			db = scope(db)
+		}
 	}
 
 	for _, f := range p.fns {
diff --git a/migrator.go b/migrator.go
index 40936ef9..f39dd9fd 100644
--- a/migrator.go
+++ b/migrator.go
@@ -8,10 +8,12 @@ import (
 // Migrator returns migrator
 func (db *DB) Migrator() Migrator {
 	// apply scopes to migrator
-	scopes := db.Statement.scopes
-	db.Statement.scopes = nil
-	for _, scope := range scopes {
-		db = scope(db)
+	for len(db.Statement.scopes) > 0 {
+		scopes := db.Statement.scopes
+		db.Statement.scopes = nil
+		for _, scope := range scopes {
+			db = scope(db)
+		}
 	}
 
 	return db.Dialector.Migrator(db.Session(&Session{}))