Ruby on rails 带关系的标签系统

我为我们的文章实现了一个标签系统

 class Country < ActiveRecord::Base
    has_many :articles


end


 class Region < ActiveRecord::Base
    has_many :articles


end


class Article < ActiveRecord::Base

      belongs_to :region
      belongs_to :country

      def self.tagged_with(name)
        Tag.find_by_name!(name).articles
      end

    end

在我的索引页上，我只显示与正确的region

params（region\u id）

相关的文章，因此这很好。但是如何将地区和国家参数集成到“tagged_with”功能中

范例

/en/italy/umbria/articles/wines

>显示标有“wines”的文章，这些文章与umbria地区有关系

/en/italy/tuscany/articles/wines

>显示标记为“wines”且与托斯卡纳地区有关系的文章

---

/en/italy/articles/wines>显示标记为“wines”且与意大利国家有关系的文章

您有两种选择：嵌套资源和使用动态分段。护栏导轨：

基本上你可以这样说：

# routes.rb, You should put this just before defining root path. Also test how it works with routes scopes/namespaces
get ':country/:region/articles/:tag', to: "articles#tagged_and_regional"

控制器：

def index
    if params[:tag]
       @articles = Article.tagged_with(params[:tag])
      else
        @region = Region.find(params[:region_id])        
        @article_region = @region.articles
      end
  end

#articles_controller.rb
def tagged_and_regional
  Article.tagged_and_regional(params[:country], params[:region], params[:tag])
end

型号：

# I don't know Your data structure, so I am taking a guess
def self.tagged_and_regional(country, region, tag)
  joins(:region, :country, :tags)
    .where("counties.name = ? AND regions.name = ? AND tags.name = ?", country, region, name)
end