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- // Copyright 2020 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 migrations
-
- import (
- "xorm.io/xorm"
- )
-
- func fixRepoTopics(x *xorm.Engine) error {
- type Topic struct {
- ID int64 `xorm:"pk autoincr"`
- Name string `xorm:"UNIQUE VARCHAR(25)"`
- RepoCount int
- }
-
- type RepoTopic struct {
- RepoID int64 `xorm:"pk"`
- TopicID int64 `xorm:"pk"`
- }
-
- type Repository struct {
- ID int64 `xorm:"pk autoincr"`
- Topics []string `xorm:"TEXT JSON"`
- }
-
- const batchSize = 100
- sess := x.NewSession()
- defer sess.Close()
- repos := make([]*Repository, 0, batchSize)
- topics := make([]string, 0, batchSize)
- for start := 0; ; start += batchSize {
- repos = repos[:0]
-
- if err := sess.Begin(); err != nil {
- return err
- }
-
- if err := sess.Limit(batchSize, start).Find(&repos); err != nil {
- return err
- }
-
- if len(repos) == 0 {
- break
- }
-
- for _, repo := range repos {
- topics = topics[:0]
- if err := sess.Select("name").Table("topic").
- Join("INNER", "repo_topic", "repo_topic.topic_id = topic.id").
- Where("repo_topic.repo_id = ?", repo.ID).Desc("topic.repo_count").Find(&topics); err != nil {
- return err
- }
- repo.Topics = topics
- if _, err := sess.ID(repo.ID).Cols("topics").Update(repo); err != nil {
- return err
- }
- }
-
- if err := sess.Commit(); err != nil {
- return err
- }
- }
-
- return nil
- }
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