Rails Model for Playlist that can contain tracks and albums using polymorphism
- by philk
I struggle to find a model how to store a playlist with different type of items on it in Rails.
Consider I have
class Track
end
class Album
has_many :tracks
end
class PlaylistItem
belongs_to :playable
belongs_to :playlist
end
class Playable
belongs_to :playable, :polymorph => true
end
class Playlist
has_many :playlist_items
end
I think I can use a polymorphic model "Playable" here since the Playlist can contain Tracks, Albums and maybe in the future also Movies.
Also I would like to use STI for Track and Albums since they share some common attributes like title and length but also have totally different attributes.
I modeled it like described here but it does not work.
Anybody any idea how to model a Playlist that can contain many items of different kind?
