public IEnumerable <Article> GetByCategoryId(int categoryId)
{
List <Article> articles = new List <Article>();
articles.AddRange(_articleData.GetByCategoryId(categoryId));
foreach (Article article in articles)
{
article.ArticleRefs = _articleRefData.GetById(article.Id);
article.CategoryRefs = _categoryRefsData.GetById(article.Id);
}
return(articles);
}