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// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package db
import "xorm.io/builder"
// CountOrphanedObjects count subjects with have no existing refobject anymore
func CountOrphanedObjects(subject, refobject, joinCond string) (int64, error) {
return GetEngine(DefaultContext).Table("`"+subject+"`").
Join("LEFT", "`"+refobject+"`", joinCond).
Where(builder.IsNull{"`" + refobject + "`.id"}).
Select("COUNT(`" + subject + "`.`id`)").
Count()
}
// DeleteOrphanedObjects delete subjects with have no existing refobject anymore
func DeleteOrphanedObjects(subject, refobject, joinCond string) error {
subQuery := builder.Select("`"+subject+"`.id").
From("`"+subject+"`").
Join("LEFT", "`"+refobject+"`", joinCond).
Where(builder.IsNull{"`" + refobject + "`.id"})
b := builder.Delete(builder.In("id", subQuery)).From("`" + subject + "`")
_, err := GetEngine(DefaultContext).Exec(b)
return err
}
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