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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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