Dont load Review if Comment is CommentTypeReviewRequest (#28551) (#29160)

Backport #28551

RequestReview get deleted on review.
So we don't have to try to load them on comments.

models/issues/comment.go

@@ -688,8 +688,15 @@ func (c *Comment) LoadReactions(ctx context.Context, repo *repo_model.Repository
 }
 
 func (c *Comment) loadReview(ctx context.Context) (err error) {
+	if c.ReviewID == 0 {
+		return nil
+	}
 	if c.Review == nil {
 		if c.Review, err = GetReviewByID(ctx, c.ReviewID); err != nil {
+			// review request which has been replaced by actual reviews doesn't exist in database anymore, so ignorem them.
+			if c.Type == CommentTypeReviewRequest {
+				return nil
+			}
 			return err
 		}
 	}

models/issues/comment_list.go

@@ -430,7 +430,8 @@ func (comments CommentList) loadReviews(ctx context.Context) error {
 	for _, comment := range comments {
 		comment.Review = reviews[comment.ReviewID]
 		if comment.Review == nil {
-			if comment.ReviewID > 0 {
+			// review request which has been replaced by actual reviews doesn't exist in database anymore, so don't log errors for them.
+			if comment.ReviewID > 0 && comment.Type != CommentTypeReviewRequest {
 				log.Error("comment with review id [%d] but has no review record", comment.ReviewID)
 			}
 			continue

models/issues/review.go

@@ -622,6 +622,9 @@ func AddReviewRequest(ctx context.Context, issue *Issue, reviewer, doer *user_mo
 		return nil, err
 	}
 
+	// func caller use the created comment to retrieve created review too.
+	comment.Review = review
+
 	return comment, committer.Commit()
 }