public ActionResult DeleteBySplitId(string splitName)
        {
            List <int> idsList = StaticHelpers.GetIdsBySplitName(splitName);

            IEnumerable <Article> articles = _articleContext.Articles
                                             .Include(m => m.Source)
                                             .Include(n => n.Informations)
                                             .OrderBy(x => x.Date) //najstarsze
                                             .Where(m => idsList.Contains(m.Id));

            if (articles == null)
            {
                return(NotFound());
            }

            _articleContext.RemoveRange(articles);
            _articleContext.SaveChanges();

            return(NoContent());
        }