def remove(self, user, **kwargs):
type = kwargs['type']
id = kwargs['id']
if not type or not id:
abort(400)
songs = user.song_query.filter(self.id_map[type]==id)
if not songs:
abort(404)
for song in songs:
user.remove_song(song)
try:
Session.commit()
except Exception, e:
Session.rollback()
raise
