Fix issue/PR numbers (go-gitea#22037) (go-gitea#22045)

Backport go-gitea#22037.

When deleting a closed issue, we should update both `NumIssues`and
`NumClosedIssues`, or `NumOpenIssues`(`= NumIssues -NumClosedIssues`)
will be wrong. It's the same for pull requests.

Releated to go-gitea#21557.

Alse fixed two harmless problems:

- The SQL to check issue/PR total numbers is wrong, that means it will
update the numbers even if they are correct.
- Replace legacy `num_issues = num_issues + 1` operations with
`UpdateRepoIssueNumbers`.

models/issues/issue.go

@@ -1007,12 +1007,7 @@ func NewIssueWithIndex(ctx context.Context, doer *user_model.User, opts NewIssue
 		}
 	}
 
-	if opts.IsPull {
-		_, err = e.Exec("UPDATE `repository` SET num_pulls = num_pulls + 1 WHERE id = ?", opts.Issue.RepoID)
-	} else {
-		_, err = e.Exec("UPDATE `repository` SET num_issues = num_issues + 1 WHERE id = ?", opts.Issue.RepoID)
-	}
-	if err != nil {
+	if err := repo_model.UpdateRepoIssueNumbers(ctx, opts.Issue.RepoID, opts.IsPull, false); err != nil {
 		return err
 	}
 

models/repo.go

@@ -602,7 +602,7 @@ func CheckRepoStats(ctx context.Context) error {
 		},
 		// Repository.NumIssues
 		{
-			statsQuery("SELECT repo.id FROM `repository` repo WHERE repo.num_issues!=(SELECT COUNT(*) FROM `issue` WHERE repo_id=repo.id AND is_closed=? AND is_pull=?)", false, false),
+			statsQuery("SELECT repo.id FROM `repository` repo WHERE repo.num_issues!=(SELECT COUNT(*) FROM `issue` WHERE repo_id=repo.id AND is_pull=?)", false),
 			repoStatsCorrectNumIssues,
 			"repository count 'num_issues'",
 		},
@@ -614,7 +614,7 @@ func CheckRepoStats(ctx context.Context) error {
 		},
 		// Repository.NumPulls
 		{
-			statsQuery("SELECT repo.id FROM `repository` repo WHERE repo.num_pulls!=(SELECT COUNT(*) FROM `issue` WHERE repo_id=repo.id AND is_closed=? AND is_pull=?)", false, true),
+			statsQuery("SELECT repo.id FROM `repository` repo WHERE repo.num_pulls!=(SELECT COUNT(*) FROM `issue` WHERE repo_id=repo.id AND is_pull=?)", true),
 			repoStatsCorrectNumPulls,
 			"repository count 'num_pulls'",
 		},

services/issue/issue.go

@@ -220,9 +220,16 @@ func deleteIssue(issue *issues_model.Issue) error {
 		return err
 	}
 
-	if err := repo_model.UpdateRepoIssueNumbers(ctx, issue.RepoID, issue.IsPull, issue.IsClosed); err != nil {
+	// update the total issue numbers
+	if err := repo_model.UpdateRepoIssueNumbers(ctx, issue.RepoID, issue.IsPull, false); err != nil {
 		return err
 	}
+	// if the issue is closed, update the closed issue numbers
+	if issue.IsClosed {
+		if err := repo_model.UpdateRepoIssueNumbers(ctx, issue.RepoID, issue.IsPull, true); err != nil {
+			return err
+		}
+	}
 
 	if err := issues_model.UpdateMilestoneCounters(ctx, issue.MilestoneID); err != nil {
 		return fmt.Errorf("error updating counters for milestone id %d: %w",