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// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_23 //nolint
import (
"fmt"
"xorm.io/xorm"
"xorm.io/xorm/schemas"
)
// AddUniqueIndexForProjectIssue adds unique indexes for project issue table
func AddUniqueIndexForProjectIssue(x *xorm.Engine) error {
// remove possible duplicated records in table project_issue
type result struct {
IssueID int64
ProjectID int64
Cnt int
}
var results []result
if err := x.Select("issue_id, project_id, count(*) as cnt").
Table("project_issue").
GroupBy("issue_id, project_id").
Having("count(*) > 1").
Find(&results); err != nil {
return err
}
for _, r := range results {
if x.Dialect().URI().DBType == schemas.MSSQL {
if _, err := x.Exec(fmt.Sprintf("delete from project_issue where id in (SELECT top %d id FROM project_issue WHERE issue_id = ? and project_id = ?)", r.Cnt-1), r.IssueID, r.ProjectID); err != nil {
return err
}
} else {
var ids []int64
if err := x.SQL("SELECT id FROM project_issue WHERE issue_id = ? and project_id = ? limit ?", r.IssueID, r.ProjectID, r.Cnt-1).Find(&ids); err != nil {
return err
}
if _, err := x.Table("project_issue").In("id", ids).Delete(); err != nil {
return err
}
}
}
// add unique index for project_issue table
type ProjectIssue struct { //revive:disable-line:exported
ID int64 `xorm:"pk autoincr"`
IssueID int64 `xorm:"INDEX unique(s)"`
ProjectID int64 `xorm:"INDEX unique(s)"`
}
return x.Sync(new(ProjectIssue))
}
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