Ruby on rails构建关联范围

Question

如何根据爱好者的数量​​列出索引页面中的所有游戏？感谢

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

尝试这样的事情：

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