Follow yp05327's suggestion

Author: lunny

models/issues/issue_list.go

@@ -312,6 +312,9 @@ func (issues IssueList) LoadAssignees(ctx context.Context) error {
 
 	for _, issue := range issues {
 		issue.Assignees = assignees[issue.ID]
+		if len(issue.Assignees) > 0 {
+			issue.Assignee = issue.Assignees[0]
+		}
 		issue.isAssigneeLoaded = true
 	}
 	return nil

models/issues/pull_list.go

@@ -174,7 +174,7 @@ func (prs PullRequestList) LoadRepositories(ctx context.Context) error {
 	if err := db.GetEngine(ctx).
 		In("id", repoIDs).
 		Find(&reposMap); err != nil {
-		return fmt.Errorf("find issues: %w", err)
+		return fmt.Errorf("find repos: %w", err)
 	}
 	for _, pr := range prs {
 		if pr.BaseRepo == nil {

routers/api/v1/repo/pull.go

@@ -118,7 +118,7 @@ func ListPullRequests(ctx *context.APIContext) {
 	apiPrs := make([]*api.PullRequest, len(prs))
 	// NOTE: load repository first, so that issue.Repo will be filled with pr.BaseRepo
 	if err := prs.LoadRepositories(ctx); err != nil {
-		ctx.Error(http.StatusInternalServerError, "LoadAttributes", err)
+		ctx.Error(http.StatusInternalServerError, "LoadRepositories", err)
 		return
 	}
 	issueList, err := prs.LoadIssues(ctx)