}

	var err error
	_ = DB.Migrator().DropTable(&RelationModel1{}, &RelationModel2{}, &RelationModel3{})

	tx := DB.Session(&gorm.Session{})
	tx.IgnoreRelationshipsWhenMigrating = true

	err = tx.AutoMigrate(&RelationModel3{})
	if err != nil {
		t.Errorf("AutoMigrate err:%v", err)
	}

	// RelationModel3 should be existed