Lazy call registered scopes

callbacks.go

@@ -72,8 +72,10 @@ func (cs *callbacks) Raw() *processor {
 }
 
 func (p *processor) Execute(db *DB) {
-	curTime := time.Now()
-	stmt := db.Statement
+	var (
+		curTime = time.Now()
+		stmt    = db.Statement
+	)
 
 	if stmt.Model == nil {
 		stmt.Model = stmt.Dest
@@ -106,6 +108,12 @@ func (p *processor) Execute(db *DB) {
 		}
 	}
 
+	// call scopes
+	for _, scope := range stmt.scopes {
+		db = scope(db)
+	}
+	stmt.scopes = nil
+
 	for _, f := range p.fns {
 		f(db)
 	}

statement.go

@@ -43,6 +43,7 @@ type Statement struct {
 	CurDestIndex         int
 	attrs                []interface{}
 	assigns              []interface{}
+	scopes               []func(*DB) *DB
 }
 
 type join struct {
@@ -481,6 +482,10 @@ func (stmt *Statement) clone() *Statement {
 		copy(newStmt.Joins, stmt.Joins)
 	}
 
+	for _, scope := range stmt.scopes {
+		stmt.scopes = append(stmt.scopes, scope)
+	}
+
 	stmt.Settings.Range(func(k, v interface{}) bool {
 		newStmt.Settings.Store(k, v)
 		return true