Ruby on rails RubyonRails–；具有多个多对多关联的模型

我目前正在RubyonRails 3.2.1中开发一个龙与地下城第四版角色表应用程序。我目前正处于一个阶段，我意识到我需要将角色种族（矮人、精灵等）与能力加成联系起来。（例如：矮人获得+2的体质加成和智慧加成作为种族特征。）

我目前有以下设置：

class Character < ActiveRecord::Base {
  has_many :attributions
  has_many :abilities, through: :attributions
}

class Attribution < ActiveRecord::Base {
  belongs_to :character
  belongs_to :ability

  # The "attributions" table also has the column "score,"
  # which is the character's ability score
}

class Ability < ActiveRecord::Base {
  has_many :attributions
  has_many :characters, through: :attributions
}

然而，即使这样做可行，我还是觉得对于不同的连接使用相同的连接模型（即使目的几乎相同）是一种丑陋的方法。当然，我可以创建一种不同类型的连接，如下所示：

class CharacterRace < ActiveRecord::Base {
  has_many :abilities, through: :attributions

  # These are for the racial bonus
  has_many :racial_ability_bonuses
  has_many :abilities, through: :racial_ability_bonuses
}

class RacialAbilityBonus < ActiveRecord::Base {
  belongs_to :character_race
  belongs_to :ability
}

class Ability < ActiveRecord::Base {
  has_many :attributions
  has_many :abilities, through: :attributions

  # These are for the racial bonus
  has_many :racial_ability_bonuses
  has_many :character_races, through: :racial_ability_bonuses
}

class CharacterRace

这可能会起作用，但有一个问题。不仅种族可以有这样的特征/奖金。一件魔法物品也可以获得能力加成。因此，一个

项目

模型也应该通过：：项目(能力)奖金关联获得一个

拥有_许多：能力。继续沿着上面解释的道路走下去，这将导致许多连接模型

因此，我想问你们是否知道处理这个问题的好方法。任何关于改进现有代码的建议都是受欢迎的

我非常感谢你所有认真的回答。：-）
 我想你只是需要。
我想你只是需要。
我记得以前读过这篇文章。谢谢您的回答，我会尽快查看。：-）我记得以前读过这篇文章。谢谢您的回答，我会尽快查看。：-）
class CharacterRace < ActiveRecord::Base {
  has_many :abilities, through: :attributions

  # These are for the racial bonus
  has_many :racial_ability_bonuses
  has_many :abilities, through: :racial_ability_bonuses
}

class RacialAbilityBonus < ActiveRecord::Base {
  belongs_to :character_race
  belongs_to :ability
}

class Ability < ActiveRecord::Base {
  has_many :attributions
  has_many :abilities, through: :attributions

  # These are for the racial bonus
  has_many :racial_ability_bonuses
  has_many :character_races, through: :racial_ability_bonuses
}