在不同对象中存储不同对象 id_s 的多对多关系

Question

嗨，我想在 Rails 中创建关系。

我有战士模型、法师模型和阵营模型。

我想创建这样的关系：

warrior model can have_many factions 
mage model can have many factions. 
Faction model can have many warriors and mages

我如何创建战士和法师对象与派系对象之间的关系，这将存储属于特定 faction/factions 的战士和法师的 id_s？

所以当我打电话时：

 faction.warriors I get warriors of specific faction. 
 faction.mage I get mages of this faction
 warriors.faction I get the warrior faction.
 mage.faction I get the mage faction.

我在考虑多态关联。但它只有一个主人。

有线索吗？

Answer 1

How can I create relation between warriors and mages objects and faction object, that will store id_s of both warriors and mages that belong to specific faction/factions ?

有 has_and_belongs_to_many 关系

Warrior
  has_and_belongs_to_many :factions

Mage
  has_and_belongs_to_many :factions

Faction
  has_and_belongs_to_many :mages
  has_and_belongs_to_many :warriors

Answer 2

不太清楚你想要 many_to_many 还是 has_many 关系。

但是从你在这里写的内容来看：

faction.warriors I get warriors of specific faction. faction.mage I get mages of this faction warriors.faction I get the warrior faction. mage.faction I get the mage faction.

看来你只需要一个简单的关联。如果那是正确的，你的类应该是这样的：

class Warrior < ActiveRecord::Base
    belongs_to :faction
end

class Mage < ActiveRecord::Base
    belongs_to :faction
end

class Faction < ActiveRecord::Base
    has_many :warriors
    has_many :mages
end

干杯！

在不同对象中存储不同对象 id_s 的多对多关系

many to many relation that store different objects id_s in differen object

ruby-on-rails

relational-database