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gitea/models/migrations/v1_22/v283.go

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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_22 //nolint
import (
"fmt"
"xorm.io/xorm"
"xorm.io/xorm/schemas"
)
func AddCombinedIndexToIssueUser(x *xorm.Engine) error {
type OldIssueUser struct {
IssueID int64
UID int64
Cnt int64
}
var duplicatedIssueUsers []OldIssueUser
if err := x.SQL("select * from (select issue_id, uid, count(1) as cnt from issue_user group by issue_id, uid) a where a.cnt > 1").
Find(&duplicatedIssueUsers); err != nil {
return err
}
for _, issueUser := range duplicatedIssueUsers {
if x.Dialect().URI().DBType == schemas.MSSQL {
if _, err := x.Exec(fmt.Sprintf("delete from issue_user where id in (SELECT top %d id FROM issue_user WHERE issue_id = ? and uid = ?)", issueUser.Cnt-1), issueUser.IssueID, issueUser.UID); err != nil {
return err
}
} else {
var ids []int64
if err := x.SQL("SELECT id FROM issue_user WHERE issue_id = ? and uid = ? limit ?", issueUser.IssueID, issueUser.UID, issueUser.Cnt-1).Find(&ids); err != nil {
return err
}
if _, err := x.Table("issue_user").In("id", ids).Delete(); err != nil {
return err
}
}
}
type IssueUser struct {
UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
}
return x.Sync(&IssueUser{})
}