public async Task <ActionResult <LikedSongs> > PostLikedSongs(LikedSongs likedSongs)
{
_context.LikedSongs.Add(likedSongs);
await _context.SaveChangesAsync();
return(CreatedAtAction("GetLikedSongs", new { id = likedSongs.Id }, likedSongs));
}
public IActionResult LikeSong(string trackId)
{
User currentUser = database.User.ToList().Find(u => u.Email == LoginController.UserEmail);
LikedSongs song = ItunesDAL.SaveLike(trackId);
currentUser.LikedSongs.Add(song);
var saved = false;
while (!saved)
{
try
{
// Attempt to save changes to the database
database.User.Update(currentUser).State = EntityState.Modified;
database.SaveChanges();
saved = true;
}
catch (DbUpdateConcurrencyException ex)
{
foreach (var entry in ex.Entries)
{
if (entry.Entity is User)
{
var proposedValues = entry.CurrentValues;
var databaseValues = entry.GetDatabaseValues();
foreach (var property in proposedValues.Properties)
{
var proposedValue = proposedValues[property];
var databaseValue = databaseValues[property];
// TODO: decide which value should be written to database
// proposedValues[property] = <value to be saved>;
}
// Refresh original values to bypass next concurrency check
entry.OriginalValues.SetValues(databaseValues);
}
else
{
throw new NotSupportedException(
"Don't know how to handle concurrency conflicts for "
+ entry.Metadata.Name);
}
}
}
}
return(RedirectToAction("HomePage"));
}
