Ruby on rails建立關聯範圍

Question

如何根據愛好者數量列出索引頁面中的所有遊戲？感謝

class Game < ActiveRecord::Base 
    has_many :reverse_relationships, :dependent => :destroy, :foreign_key => "game_id", :class_name => "Relationship" 
    has_many :lovers, :through => :reverse_relationships, :source => :user_id 
end 

Answer 1

嘗試是這樣的：

Game.all(:include => :lovers).sort{|a,b| b.lovers.size <=> a.lovers.size}