private async Task <bool> AddUrlToDb(URL url) { var urlInDb = await dataContext.Urls .FirstOrDefaultAsync(oldUrl => oldUrl.FullUrl == url.FullUrl); if (urlInDb != null) { return(false); } var hashids = new Hashids($"{url.FullUrl}"); var id = hashids.Encode(1, 2, 3, 4, 5); url.ShortUrl = "https://voronintask.ru/go?id=" + id; dataContext.Add(url); await dataContext.SaveChangesAsync(); return(true); }