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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package db
import (
"context"
"xorm.io/builder"
)
// CountOrphanedObjects count subjects with have no existing refobject anymore
func CountOrphanedObjects(ctx context.Context, subject, refobject, joinCond string) (int64, error) {
return GetEngine(ctx).
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(ctx context.Context, 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(ctx).Exec(b)
return err
}
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