Update issue_index to finish migration (#16685)

* update issue_index to finish migration

* One Func to RecalculateIssueIndexForRepo

Author: 6543

models/issue.go

@@ -982,6 +982,31 @@ func newIssue(e *xorm.Session, doer *User, opts NewIssueOptions) (err error) {
 	return opts.Issue.addCrossReferences(e, doer, false)
 }
 
+// RecalculateIssueIndexForRepo create issue_index for repo if not exist and
+// update it based on highest index of existing issues assigned to a repo
+func RecalculateIssueIndexForRepo(repoID int64) error {
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if err := upsertResourceIndex(sess, "issue_index", repoID); err != nil {
+		return err
+	}
+
+	var max int64
+	if _, err := sess.Select(" MAX(`index`)").Table("issue").Where("repo_id=?", repoID).Get(&max); err != nil {
+		return err
+	}
+
+	if _, err := sess.Exec("UPDATE `issue_index` SET max_index=? WHERE group_id=?", max, repoID); err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}
+
 // NewIssue creates new issue with labels for repository.
 func NewIssue(repo *Repository, issue *Issue, labelIDs []int64, uuids []string) (err error) {
 	idx, err := GetNextResourceIndex("issue_index", repo.ID)

modules/migrations/gitea_uploader.go

@@ -871,6 +871,11 @@ func (g *GiteaLocalUploader) Finish() error {
 		return ErrRepoNotCreated
 	}
 
+	// update issue_index
+	if err := models.RecalculateIssueIndexForRepo(g.repo.ID); err != nil {
+		return err
+	}
+
 	g.repo.Status = models.RepositoryReady
 	return models.UpdateRepositoryCols(g.repo, "status")
 }