ruby-on-rails-3 - 在 has_many, :through 关系中获取兄弟姐妹记录

Question

鉴于这种has_many, :through情况：

文章.rb

class Article < ActiveRecord::Base
  attr_accessible :body, :issue, :name, :id, :brand_ids

  has_many :publications
  has_many :docs, :through => :publications
  has_many :silos
  has_many :brands, :through => :silos
end

品牌.rb

class Brand < ActiveRecord::Base
  attr_accessible :name, :logo1, :logo2, :colour1, :colour2

  has_many :users
  has_many :prices, :dependent => :destroy
  has_many :silos
  has_many :articles, :through => :silos
end

用户.rb

class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable
  attr_accessor :current_password
  attr_accessible :name, :password, :password_confirmation, :current_password, :email, :remember_me, :brand_id
  belongs_to :brand
end

我将如何编写范围、方法或助手来获取与当前用户Article共享的记录？Brand这些方面的东西：

class Article < ActiveRecord::Base
  scope :branded_articles, lambda { |user| where('brand_ids = ?', user.brand) }
end

编辑

这样的事情应该有效，对吧？我只是无法弄清楚语法。

Article.all.brands.find(1) #should find all articles available to a brand with an ID of 1

Answer 1

解决方案非常简单：

@articles = current_user.brand.articles

运气好的话可以帮助别人。