static public void CreateData(FierceStukCloudDbContext context) { PlayLists = PlayListsFactory(); Authors = AuthorsFactory(); context.PlayLists.AddRange(PlayLists.AsEnumerable()); context.Authors.AddRange(Authors.AsEnumerable()); context.SaveChanges(); var s1 = new Song() { Id = Guid.NewGuid(), Title = "title0" }; s1.Authors.Add(Authors[0]); //s1.DbAuthors = new List<SongAuthor>() //{ // SongAuthorFactory(s1.Id, Authors[0].Id) //}; var s2 = new Song() { Id = Guid.NewGuid(), Title = "title2" }; s2.Authors.Add(Authors[0]); //s2.DbAuthors = new List<SongAuthor>() //{ // SongAuthorFactory(s2.Id, Authors[0].Id) //}; Songs = new List <Song>(); Songs.Add(s1); Songs.Add(s2); //PlayLists[0].DbSongs.Add(new SongPlayList() { Place = 0, PlayListId = PlayLists[0].Id, SongId = Songs[0].Id }); PlayLists[0].Songs.Add(Songs[0]); context.Songs.Add(s1); context.Songs.Add(s2); context.SaveChanges(); }