- has_many :all_comments, -> { left_joins(:author).order(:created_at) }, :class_name => "NoteComment", :foreign_key => :note_id
+ has_many :all_comments, -> { left_joins(:author).order(:created_at) }, :class_name => "NoteComment", :foreign_key => :note_id, :inverse_of => :note
+ has_many :subscriptions, :class_name => "NoteSubscription"
+ has_many :subscribers, :through => :subscriptions, :source => :user