public ActionResult Edit(int?id, PlaylistEditTrackDetails 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 update
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"));
}
else
{
// Show the details view, which will have the updated data
return(RedirectToAction("Details", new { id = newItem.PlaylistId }));
}
}
public PlaylistEditTrackDetails PlaylistEditTracks(PlaylistEditTrackDetails newItem)
{
var o = ds.Playlists.Include("Tracks").SingleOrDefault(p => p.PlaylistId == newItem.PlaylistId);
if (o == null)
{
// Problem - object was not found, so return
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);
}
// Save changes
ds.SaveChanges();
return(mapper.Map <Playlist, PlaylistEditTrackDetails>(o));
}
}
