public ActionResult Create(Movie movie, FormCollection MovieForm)
{
if (ModelState.IsValid) {
//how to add tags to this movie object? I am getting user selected tag ids posted back
//movie.Tags = new List<Tag>();
foreach (var tag in MovieForm["Tags"].Split(','))
{
var _tag = new Tag { tagID = Convert.ToInt32(tag)};
//movie.Tags is null
movie.Tags.Add(_tag);
}
movieRepository.InsertOrUpdate(movie);
movieRepository.Save();
return RedirectToAction("Index");
} else {
var m = new M2M.ViewModels.MovieCreateViewModel();
m.Tags = tagRepository.All.ToList<Tag>();
return View(m);
}
}
public void InsertOrUpdate(Movie movie)
{
if (movie.MovieID == default(int)) {
// New entity
//to add realtion between this new movie and all existed tags in db we need to set state of
//each tag to Unchanged otherwise it will insert new tags into db with auto genrated Ids and
//other colums set to null/empty
foreach (var tag in movie.Tags)
{
context.Entry(tag).State = EntityState.Unchanged;
}
context.Movies.Add(movie);
} else {
// Existing entity
context.Entry(movie).State = EntityState.Modified;
}
}
public ActionResult Edit(Movie movie)
{
if (ModelState.IsValid) {
movieRepository.InsertOrUpdate(movie);
movieRepository.Save();
return RedirectToAction("Index");
} else {
return View();
}
}