I have 3 models with a has_many through association:
class Recording
has_many :listenings
has_many :listeners, :through => :listenings, :source => :user
...
end
class User
has_many :listenings, :foreign_key => "listener_id"
has_many :listened_recordings, :foreign_key =>
"listener_id", :through => :listenings, :source => :recording
...
end
class Listening
belongs_to :recording
belongs_to :listener, :class_name => "User"
...
end
So I can get the recordings the user has listened to, easily with:
user.listened_recordings
How do create a find method that retrieves all of the recordings the
user has not listened to?
The way I have been doing it is:
Recording.all.reject { |r| listened_recordings.include?(r) }
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