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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_14 //nolint
import (
"fmt"
"xorm.io/xorm"
)
// DeleteOrphanedIssueLabels looks through the database for issue_labels where the label no longer exists and deletes them.
func DeleteOrphanedIssueLabels(x *xorm.Engine) error {
type IssueLabel struct {
ID int64 `xorm:"pk autoincr"`
IssueID int64 `xorm:"UNIQUE(s)"`
LabelID int64 `xorm:"UNIQUE(s)"`
}
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
if err := sess.Sync(new(IssueLabel)); err != nil {
return fmt.Errorf("Sync: %w", err)
}
if _, err := sess.Exec(`DELETE FROM issue_label WHERE issue_label.id IN (
SELECT ill.id FROM (
SELECT il.id
FROM issue_label AS il
LEFT JOIN label ON il.label_id = label.id
WHERE
label.id IS NULL
) AS ill)`); err != nil {
return err
}
return sess.Commit()
}
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