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fff32e9469
Migrations should never use model structs directly, because the model structs can be different in different releases. e.g. if one migration uses "User" model, it works in the early releases, then one day, when the User model changes, the migration breaks because it will use the new (incorrect) User model, it should only use the old User model. The same to "modules/structs". --------- Signed-off-by: wxiaoguang <wxiaoguang@gmail.com> Co-authored-by: delvh <dev.lh@web.de>
43 lines
960 B
Go
43 lines
960 B
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package v1_14
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import (
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"fmt"
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"gitea.dev/modelmigration/base"
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)
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// DeleteOrphanedIssueLabels looks through the database for issue_labels where the label no longer exists and deletes them.
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func DeleteOrphanedIssueLabels(x base.EngineMigration) error {
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type IssueLabel struct {
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ID int64 `xorm:"pk autoincr"`
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IssueID int64 `xorm:"UNIQUE(s)"`
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LabelID int64 `xorm:"UNIQUE(s)"`
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}
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sess := x.NewSession()
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defer sess.Close()
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if err := sess.Begin(); err != nil {
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return err
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}
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if err := sess.Sync(new(IssueLabel)); err != nil {
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return fmt.Errorf("Sync: %w", err)
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}
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if _, err := sess.Exec(`DELETE FROM issue_label WHERE issue_label.id IN (
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SELECT ill.id FROM (
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SELECT il.id
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FROM issue_label AS il
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LEFT JOIN label ON il.label_id = label.id
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WHERE
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label.id IS NULL
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) AS ill)`); err != nil {
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return err
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}
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return sess.Commit()
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}
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