fix: fix an issue where related fields could not be updated during a transaction. (#1239)

* chore(expect): regenerate `dal_test`

* fix(relation-tx): fix association bug(1070)

* Revert "fix(relation-tx): fix association bug(1070)"

This reverts commit 08cab39.

* style(*): fix format

Author: miya-masa

internal/template/struct.go

@@ -107,13 +107,16 @@ func ({{.S}} *{{.QueryStructName}}) updateTableName(table string) *{{.QueryStruc
 
 	cloneMethod = `
 func ({{.S}} {{.QueryStructName}}) clone(db *gorm.DB) {{.QueryStructName}} {
-	{{.S}}.{{.QueryStructName}}Do.ReplaceConnPool(db.Statement.ConnPool)
+	{{.S}}.{{.QueryStructName}}Do.ReplaceConnPool(db.Statement.ConnPool){{range .Fields }}{{if .IsRelation}}
+  {{$.S}}.{{.Relation.Name}}.db = db.Session(&gorm.Session{Initialized: true})
+  {{$.S}}.{{.Relation.Name}}.db.Statement.ConnPool = db.Statement.ConnPool{{end}}{{end}}
 	return {{.S}}
 }
 `
 	replaceMethod = `
 func ({{.S}} {{.QueryStructName}}) replaceDB(db *gorm.DB) {{.QueryStructName}} {
-	{{.S}}.{{.QueryStructName}}Do.ReplaceDB(db)
+	{{.S}}.{{.QueryStructName}}Do.ReplaceDB(db){{range .Fields}}{{if .IsRelation}}
+  {{$.S}}.{{.Relation.Name}}.db = db.Session(&gorm.Session{}){{end}}{{end}}
 	return {{.S}}
 }
 `