public ActionResult <string> getAuthorNews(int authorId) { List <NewsItemDetailDto> returnValue = new List <NewsItemDetailDto>(); // Find authors news List <NewsItemDetailDto> newsList = _relationService.getRelationsByAuthorId(authorId) .Select(item => _newsService.getNewsItemById(item.newsId)).ToList(); foreach (NewsItemDetailDto item in newsList) { returnValue.Add(referenceItem(item)); } return(Ok(returnValue)); }