public ActionResult Edit(int?id, PlaylistEditTracks newItem)
{
// Validate the input
if (!ModelState.IsValid)
{
// Our "version 1" approach is to display the "edit form" again
return(RedirectToAction("edit", new { id = newItem.PlaylistId }));
}
if (id.GetValueOrDefault() != newItem.PlaylistId)
{
// This appears to be data tampering, so redirect the user away
return(RedirectToAction("index"));
}
// Attempt to do the upate
var editedItem = m.PlaylistEditTracks(newItem);
if (editedItem == null)
{
// There was a problem updating the object
// Our "version 1" approach is to display the "edit form" again
return(RedirectToAction("edit", new { id = newItem.PlaylistId }));
}
else
{
// Show the details view, which will have the updated data
return(RedirectToAction("details", new { id = newItem.PlaylistId }));
}
}
public PlaylistWithDetails PlaylistEditTracks(PlaylistEditTracks newItem)
{
// Playlist edit existing
// Attempt to fetch the object
var o = ds.Playlists
.Include("Tracks")
.SingleOrDefault(p => p.PlaylistId == newItem.PlaylistId);
if (o == null)
{
return(null);
}
else
{
// Update the object with the incoming values
// First, clear out the existing collection
o.Tracks.Clear();
// Then, go through the incoming items
// For each one, add to the fetched object's collection
foreach (var item in newItem.TrackIds)
{
var a = ds.Tracks.Find(item);
o.Tracks.Add(a);
}
ds.SaveChanges();
return(mapper.Map <PlaylistWithDetails>(o));
}
}
