public static void DetachedEntities()
{
const int actorId = 1;
var name = MoviesContext.Instance.Actors.Where(a => a.ActorId == actorId).Select(a => $"{a.FirstName} {a.LastName}").First();
Console.WriteLine($"Original Name:\t{name}");
var actorModel = new ActorModel
{
ActorId = actorId,
FirstName = "Luke",
LastName = "Skywalker"
};
var actor = actorModel.Copy <ActorModel, Actor>();
MoviesContext.Instance.Actors.Attach(actor);
MoviesContext.Instance.Entry(actor).State = EntityState.Modified;
MoviesContext.Instance.SaveChanges();
name = MoviesContext.Instance.Actors.Where(a => a.ActorId == actorId).Select(a => $"{a.FirstName} {a.LastName}").First();
Console.WriteLine($"Updated Name:\t{name}");
actor.FirstName = "Mark";
actor.LastName = "Hammil";
MoviesContext.Instance.SaveChanges();
name = MoviesContext.Instance.Actors.Where(a => a.ActorId == actorId).Select(a => $"{a.FirstName} {a.LastName}").First();
Console.WriteLine($"Reverted Name:\t{name}");
Console.WriteLine();
const int filmId = 1;
var year = MoviesContext.Instance.Films.Where(f => f.FilmId == filmId).Select(f => f.ReleaseYear).First();
Console.WriteLine($"Original Release Year:\t{year}");
var model = new FilmUpdateModel
{
FilmId = filmId,
Description = "As Steve Rogers struggles to embrace his role in the modern world, he teams up with a fellow Avenger and S.H.I.E.L.D agent, Black Widow, to battle a new threat from history: an assassin known as the Winter Soldier.",
Title = "Captain America: The Winter Soldier",
RatingId = 3,
ReleaseYear = 2013
};
var film = model.Copy <FilmUpdateModel, Film>();
MoviesContext.Instance.Films.Attach(film);
MoviesContext.Instance.Entry(film).State = EntityState.Modified;
MoviesContext.Instance.SaveChanges();
year = MoviesContext.Instance.Films.Where(f => f.FilmId == filmId).Select(f => f.ReleaseYear).First();
Console.WriteLine($"Updated Release Year:\t{year}");
film.ReleaseYear = 2014;
MoviesContext.Instance.SaveChanges();
year = MoviesContext.Instance.Films.Where(f => f.FilmId == filmId).Select(f => f.ReleaseYear).First();
Console.WriteLine($"Reverted Release Year:\t{year}");
}
