Performance improvements for pull request list page

models/issues/issue.go

@@ -193,20 +193,6 @@ func (issue *Issue) IsTimetrackerEnabled(ctx context.Context) bool {
 	return issue.Repo.IsTimetrackerEnabled(ctx)
 }
 
-// GetPullRequest returns the issue pull request
-func (issue *Issue) GetPullRequest(ctx context.Context) (pr *PullRequest, err error) {
-	if !issue.IsPull {
-		return nil, fmt.Errorf("Issue is not a pull request")
-	}
-
-	pr, err = GetPullRequestByIssueID(ctx, issue.ID)
-	if err != nil {
-		return nil, err
-	}
-	pr.Issue = issue
-	return pr, err
-}
-
 // LoadPoster loads poster
 func (issue *Issue) LoadPoster(ctx context.Context) (err error) {
 	if issue.Poster == nil && issue.PosterID != 0 {

models/issues/issue_list.go

@@ -370,6 +370,9 @@ func (issues IssueList) LoadPullRequests(ctx context.Context) error {
 
 	for _, issue := range issues {
 		issue.PullRequest = pullRequestMaps[issue.ID]
+		if issue.PullRequest != nil {
+			issue.PullRequest.Issue = issue
+		}
 	}
 	return nil
 }

routers/api/v1/repo/issue.go

@@ -872,10 +872,11 @@ func EditIssue(ctx *context.APIContext) {
 	}
 	if form.State != nil {
 		if issue.IsPull {
-			if pr, err := issue.GetPullRequest(ctx); err != nil {
+			if err := issue.LoadPullRequest(ctx); err != nil {
 				ctx.Error(http.StatusInternalServerError, "GetPullRequest", err)
 				return
-			} else if pr.HasMerged {
+			}
+			if issue.PullRequest.HasMerged {
 				ctx.Error(http.StatusPreconditionFailed, "MergedPRState", "cannot change state of this pull request, it was already merged")
 				return
 			}

routers/api/v1/repo/issue_pin.go

@@ -240,18 +240,12 @@ func ListPinnedPullRequests(ctx *context.APIContext) {
 	}
 
 	apiPrs := make([]*api.PullRequest, len(issues))
+	if err := issues.LoadPullRequests(ctx); err != nil {
+		ctx.Error(http.StatusInternalServerError, "LoadPullRequests", err)
+		return
+	}
 	for i, currentIssue := range issues {
-		pr, err := currentIssue.GetPullRequest(ctx)
-		if err != nil {
-			ctx.Error(http.StatusInternalServerError, "GetPullRequest", err)
-			return
-		}
-
-		if err = pr.LoadIssue(ctx); err != nil {
-			ctx.Error(http.StatusInternalServerError, "LoadIssue", err)
-			return
-		}
-
+		pr := currentIssue.PullRequest
 		if err = pr.LoadAttributes(ctx); err != nil {
 			ctx.Error(http.StatusInternalServerError, "LoadAttributes", err)
 			return

services/convert/notification.go

@@ -61,8 +61,9 @@ func ToNotificationThread(ctx context.Context, n *activities_model.Notification)
 				result.Subject.LatestCommentHTMLURL = comment.HTMLURL(ctx)
 			}
 
-			pr, _ := n.Issue.GetPullRequest(ctx)
-			if pr != nil && pr.HasMerged {
+			if err := n.Issue.LoadPullRequest(ctx); err == nil &&
+				n.Issue.PullRequest != nil &&
+				n.Issue.PullRequest.HasMerged {
 				result.Subject.State = "merged"
 			}
 		}

services/pull/review.go

@@ -268,11 +268,11 @@ func createCodeComment(ctx context.Context, doer *user_model.User, repo *repo_mo
 
 // SubmitReview creates a review out of the existing pending review or creates a new one if no pending review exist
 func SubmitReview(ctx context.Context, doer *user_model.User, gitRepo *git.Repository, issue *issues_model.Issue, reviewType issues_model.ReviewType, content, commitID string, attachmentUUIDs []string) (*issues_model.Review, *issues_model.Comment, error) {
-	pr, err := issue.GetPullRequest(ctx)
-	if err != nil {
+	if err := issue.LoadPullRequest(ctx); err != nil {
 		return nil, nil, err
 	}
 
+	pr := issue.PullRequest
 	var stale bool
 	if reviewType != issues_model.ReviewTypeApprove && reviewType != issues_model.ReviewTypeReject {
 		stale = false

templates/shared/issueicon.tmpl

@@ -1,15 +1,15 @@
 {{if .IsPull}}
 	{{if and .PullRequest .PullRequest.HasMerged}}
 		{{svg "octicon-git-merge" 16 "text purple"}}
-	{{else if and (.GetPullRequest ctx) (.GetPullRequest ctx).HasMerged}}
+	{{else if and (.PullRequest) (.PullRequest.HasMerged)}}
 		{{svg "octicon-git-merge" 16 "text purple"}}
 	{{else}}
 		{{if .IsClosed}}
 			{{svg "octicon-git-pull-request" 16 "text red"}}
 		{{else}}
 			{{if and .PullRequest (.PullRequest.IsWorkInProgress ctx)}}
 				{{svg "octicon-git-pull-request-draft" 16 "text grey"}}
-			{{else if and (.GetPullRequest ctx) ((.GetPullRequest ctx).IsWorkInProgress ctx)}}
+			{{else if and (.PullRequest) (.PullRequest.IsWorkInProgress ctx)}}
 				{{svg "octicon-git-pull-request-draft" 16 "text grey"}}
 			{{else}}
 				{{svg "octicon-git-pull-request" 16 "text green"}}