Question

我有以下型号

Class User
  has_many :memberships

Class Membership
  belongs_to :user

会员资格表有两列，user_id和organization_id。但是organization_id也是用户ID。

我如何具体化关联以便：

@user.organizations返回该用户所属的组织（其他用户）列表。

Answer 1

我认为这样做的正确方法是创建三个模型如下：

#user.rb
class User < ActiveRecord::Base
  has_many :memberships
  has_one :organization
end

#organization.rb
class Organization < ActiveRecord::Base
  attr_accessible :user_id
  belongs_to :user
  has_many :memberships
end

#membership.rb
class Membership  < ActiveRecord::Base
  attr_accessible :user_id, :organization_id
  belongs_to :user
  belongs_to :organization
end

Answer 2

想出来：

class Membership < ActiveRecord::Base
  belongs_to :user
  belongs_to :organization, class_name: "User"
end

class User < ActiveRecord::Base
  has_many :memberships
  has_many :organizations, through: :memberships
end

Rails中的成员关联加入模型

2 个答案: